diff --git a/src/main/java/org/cotato/csquiz/api/attendance/controller/AttendanceAdminController.java b/src/main/java/org/cotato/csquiz/api/attendance/controller/AttendanceAdminController.java
deleted file mode 100644
index f3286ae9..00000000
--- a/src/main/java/org/cotato/csquiz/api/attendance/controller/AttendanceAdminController.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package org.cotato.csquiz.api.attendance.controller;
-
-import io.swagger.v3.oas.annotations.Operation;
-import jakarta.validation.Valid;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.cotato.csquiz.api.attendance.dto.UpdateAttendanceRequest;
-import org.cotato.csquiz.domain.attendance.service.AttendanceAdminService;
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.PatchMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@Slf4j
-@RestController
-@RequiredArgsConstructor
-@RequestMapping("/v2/api/attendances/admin")
-public class AttendanceAdminController {
-
-    private final AttendanceAdminService attendanceAdminService;
-
-    @Operation(summary = "출석 정보 변경 API")
-    @PatchMapping
-    public ResponseEntity<Void> updateAttendance(@RequestBody @Valid UpdateAttendanceRequest request) {
-        attendanceAdminService.updateAttendance(request);
-        return ResponseEntity.noContent().build();
-    }
-}
diff --git a/src/main/java/org/cotato/csquiz/api/attendance/controller/AttendanceController.java b/src/main/java/org/cotato/csquiz/api/attendance/controller/AttendanceController.java
index 71ae9e5a..cae6a823 100644
--- a/src/main/java/org/cotato/csquiz/api/attendance/controller/AttendanceController.java
+++ b/src/main/java/org/cotato/csquiz/api/attendance/controller/AttendanceController.java
@@ -46,7 +46,7 @@ public class AttendanceController {
     @Operation(summary = "출석 정보 변경 API")
     @PatchMapping
     public ResponseEntity<Void> updateAttendance(@RequestBody @Valid UpdateAttendanceRequest request) {
-        attendanceAdminService.updateAttendance(request);
+        attendanceAdminService.updateAttendanceByAttendanceId(request);
         return ResponseEntity.noContent().build();
     }
 
@@ -117,7 +117,7 @@ public ResponseEntity<AttendResponse> submitOnlineAttendanceRecord(@RequestBody
 
     @Operation(summary = "부원의 기수별 출결 기록 반환 API")
     @GetMapping("/records/members")
-    public ResponseEntity<MemberAttendanceRecordsResponse> findAllRecordsByGeneration(@RequestParam("generation-id") Long generationId ,
+    public ResponseEntity<MemberAttendanceRecordsResponse> findAllRecordsByGeneration(@RequestParam("generationId") Long generationId ,
                                                                                       @AuthenticationPrincipal Long memberId) {
         return ResponseEntity.ok().body(attendanceRecordService.findAllRecordsBy(generationId, memberId));
     }
diff --git a/src/main/java/org/cotato/csquiz/api/attendance/dto/AttendanceDeadLineDto.java b/src/main/java/org/cotato/csquiz/api/attendance/dto/AttendanceDeadLineDto.java
index 04940473..2753beb7 100644
--- a/src/main/java/org/cotato/csquiz/api/attendance/dto/AttendanceDeadLineDto.java
+++ b/src/main/java/org/cotato/csquiz/api/attendance/dto/AttendanceDeadLineDto.java
@@ -1,14 +1,17 @@
 package org.cotato.csquiz.api.attendance.dto;
 
 import com.fasterxml.jackson.annotation.JsonFormat;
+import io.swagger.v3.oas.annotations.media.Schema;
 import java.time.LocalTime;
 import java.util.Objects;
 import lombok.Builder;
 import org.cotato.csquiz.domain.attendance.enums.DeadLine;
 
 public record AttendanceDeadLineDto(
+        @Schema(example = "19:05:00")
         @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "HH:mm:ss")
         LocalTime attendanceDeadLine,
+        @Schema(example = "19:20:00")
         @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "HH:mm:ss")
         LocalTime lateDeadLine
 ) {
diff --git a/src/main/java/org/cotato/csquiz/api/attendance/dto/UpdateAttendanceRequest.java b/src/main/java/org/cotato/csquiz/api/attendance/dto/UpdateAttendanceRequest.java
index 6c2c498f..95d615cf 100644
--- a/src/main/java/org/cotato/csquiz/api/attendance/dto/UpdateAttendanceRequest.java
+++ b/src/main/java/org/cotato/csquiz/api/attendance/dto/UpdateAttendanceRequest.java
@@ -20,4 +20,8 @@ public record UpdateAttendanceRequest(
                     DEFAULT_LATE_DEADLINE.getTime());
         }
     }
+
+    public static UpdateAttendanceRequest of(Long attendanceId, Location location, AttendanceDeadLineDto attendTime) {
+        return new UpdateAttendanceRequest(attendanceId, location, attendTime);
+    }
 }
diff --git a/src/main/java/org/cotato/csquiz/api/event/controller/EventController.java b/src/main/java/org/cotato/csquiz/api/event/controller/EventController.java
new file mode 100644
index 00000000..4a7db551
--- /dev/null
+++ b/src/main/java/org/cotato/csquiz/api/event/controller/EventController.java
@@ -0,0 +1,28 @@
+package org.cotato.csquiz.api.event.controller;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.RequiredArgsConstructor;
+import org.cotato.csquiz.common.sse.SseService;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
+
+@Tag(name = "서버에서 발생할 이벤트 구독 요청 API")
+@RestController
+@RequestMapping("/v2/api/events")
+@RequiredArgsConstructor
+public class EventController {
+
+    private final SseService sseService;
+
+    @Operation(summary = "최초 로그인 시 출결 알림 구독 API")
+    @GetMapping(value = "/attendances", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
+    public ResponseEntity<SseEmitter> subscribeAttendance(@AuthenticationPrincipal Long memberId) {
+        return ResponseEntity.ok().body(sseService.subscribeAttendance(memberId));
+    }
+}
diff --git a/src/main/java/org/cotato/csquiz/api/event/dto/AttendanceStatusInfo.java b/src/main/java/org/cotato/csquiz/api/event/dto/AttendanceStatusInfo.java
new file mode 100644
index 00000000..69ad4484
--- /dev/null
+++ b/src/main/java/org/cotato/csquiz/api/event/dto/AttendanceStatusInfo.java
@@ -0,0 +1,14 @@
+package org.cotato.csquiz.api.event.dto;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Builder;
+import org.cotato.csquiz.domain.attendance.enums.AttendanceOpenStatus;
+
+@Builder
+public record AttendanceStatusInfo(
+        @Schema(description = "출결 PK", nullable = true)
+        Long attendanceId,
+        @Schema(description = "오픈 상태: 존재하면 OPEN, 없으면 CLOSED")
+        AttendanceOpenStatus openStatus
+) {
+}
diff --git a/src/main/java/org/cotato/csquiz/api/session/controller/SessionController.java b/src/main/java/org/cotato/csquiz/api/session/controller/SessionController.java
index 778ffa26..da0b4001 100644
--- a/src/main/java/org/cotato/csquiz/api/session/controller/SessionController.java
+++ b/src/main/java/org/cotato/csquiz/api/session/controller/SessionController.java
@@ -1,6 +1,7 @@
 package org.cotato.csquiz.api.session.controller;
 
 import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.Valid;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
@@ -31,6 +32,7 @@
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
+@Tag(name = "세션 정보", description = "세션 관련 API 입니다.")
 @RequestMapping("/v1/api/session")
 @RequiredArgsConstructor
 @Slf4j
@@ -39,56 +41,60 @@ public class SessionController {
     private final SessionService sessionService;
     private final SessionImageService sessionImageService;
 
-    @Operation(summary = "Session 리스트 정보 얻기", description = "Get Session Infos")
+    @Operation(summary = "세션 목록 반환 API")
     @GetMapping("")
     public ResponseEntity<List<SessionListResponse>> findSessionsByGenerationId(@RequestParam Long generationId) {
         return ResponseEntity.status(HttpStatus.OK).body(sessionService.findSessionsByGenerationId(generationId));
     }
 
-    @Operation(summary = "Session 추가하기", description = "세션 추가하기")
+
+    @Operation(summary = "CS ON인 세션 목록 반환 API")
+    @GetMapping("/cs-on")
+    public ResponseEntity<List<CsEducationOnSessionNumberResponse>> findAllCsOnSessionsByGenerationId(
+            @RequestParam Long generationId) {
+        return ResponseEntity.status(HttpStatus.OK)
+                .body(sessionService.findAllNotLinkedCsOnSessionsByGenerationId(generationId));
+    }
+
+    @Operation(summary = "Session 추가 API")
     @PostMapping(value = "/add", consumes = "multipart/form-data")
     public ResponseEntity<AddSessionResponse> addSession(@ModelAttribute @Valid AddSessionRequest request)
             throws ImageException {
         return ResponseEntity.status(HttpStatus.CREATED).body(sessionService.addSession(request));
     }
 
+    @Operation(summary = "세션 수정 API")
     @PatchMapping(value = "/update")
     public ResponseEntity<Void> updateSession(@RequestBody @Valid UpdateSessionRequest request) {
         sessionService.updateSession(request);
         return ResponseEntity.noContent().build();
     }
 
+    @Operation(summary = "세션 숫자 변경 API")
     @PatchMapping("/number")
     public ResponseEntity<Void> updateSessionNumber(@RequestBody @Valid UpdateSessionNumberRequest request) {
         sessionService.updateSessionNumber(request);
         return ResponseEntity.noContent().build();
     }
 
-    @Operation(summary = "Session 수정 - 사진 순서", description = "세션 사진 순서 바꾸기")
+    @Operation(summary = "세션 사진 순서 변경 API")
     @PatchMapping("/image/order")
     public ResponseEntity<Void> updateSessionImageOrder(@RequestBody UpdateSessionImageOrderRequest request) {
         sessionImageService.updateSessionImageOrder(request);
         return ResponseEntity.noContent().build();
     }
 
-    @Operation(summary = "Session 수정 - 사진 추가하기", description = "세션 수정 시 사진 추가하기, photoId 반환")
+    @Operation(summary = "세션 사진 추가 API")
     @PostMapping(value = "/image", consumes = "multipart/form-data")
     public ResponseEntity<AddSessionImageResponse> additionalSessionImage(@ModelAttribute @Valid AddSessionImageRequest request)
             throws ImageException {
         return ResponseEntity.status(HttpStatus.CREATED).body(sessionImageService.additionalSessionImage(request));
     }
 
-    @Operation(summary = "Session 수정 - 사진 삭제하기", description = "사진 삭제하기")
+    @Operation(summary = "세션 사진 삭제 API")
     @DeleteMapping(value = "/image")
     public ResponseEntity<Void> deleteSessionImage(@RequestBody DeleteSessionImageRequest request) {
         sessionImageService.deleteSessionImage(request);
         return ResponseEntity.noContent().build();
     }
-
-    @GetMapping("/cs-on")
-    public ResponseEntity<List<CsEducationOnSessionNumberResponse>> findAllCsOnSessionsByGenerationId(
-            @RequestParam Long generationId) {
-        return ResponseEntity.status(HttpStatus.OK)
-                .body(sessionService.findAllNotLinkedCsOnSessionsByGenerationId(generationId));
-    }
 }
diff --git a/src/main/java/org/cotato/csquiz/api/session/dto/AddSessionRequest.java b/src/main/java/org/cotato/csquiz/api/session/dto/AddSessionRequest.java
index 054ac9dd..3b119d59 100644
--- a/src/main/java/org/cotato/csquiz/api/session/dto/AddSessionRequest.java
+++ b/src/main/java/org/cotato/csquiz/api/session/dto/AddSessionRequest.java
@@ -26,11 +26,11 @@ public record AddSessionRequest(
         @NotNull
         LocalDate sessionDate,
 
-        @Schema(example = "17:00:00")
+        @Schema(example = "19:05:00")
         @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "HH:mm:ss")
         LocalTime attendanceDeadLine,
 
-        @Schema(example = "17:00:00")
+        @Schema(example = "19:20:00")
         @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "HH:mm:ss")
         LocalTime lateDeadLine,
 
diff --git a/src/main/java/org/cotato/csquiz/api/session/dto/UpdateSessionRequest.java b/src/main/java/org/cotato/csquiz/api/session/dto/UpdateSessionRequest.java
index 995566ec..bde86c08 100644
--- a/src/main/java/org/cotato/csquiz/api/session/dto/UpdateSessionRequest.java
+++ b/src/main/java/org/cotato/csquiz/api/session/dto/UpdateSessionRequest.java
@@ -1,5 +1,8 @@
 package org.cotato.csquiz.api.session.dto;
 
+import java.time.LocalDate;
+import org.cotato.csquiz.api.attendance.dto.AttendanceDeadLineDto;
+import org.cotato.csquiz.domain.attendance.embedded.Location;
 import org.cotato.csquiz.domain.generation.enums.CSEducation;
 import org.cotato.csquiz.domain.generation.enums.DevTalk;
 import org.cotato.csquiz.domain.generation.enums.ItIssue;
@@ -12,6 +15,11 @@ public record UpdateSessionRequest(
         String title,
         String description,
         @NotNull
+        LocalDate sessionDate,
+        String placeName,
+        Location location,
+        AttendanceDeadLineDto attendTime,
+        @NotNull
         ItIssue itIssue,
         @NotNull
         Networking networking,
diff --git a/src/main/java/org/cotato/csquiz/common/config/SchedulerConfig.java b/src/main/java/org/cotato/csquiz/common/config/SchedulerConfig.java
new file mode 100644
index 00000000..f52d9774
--- /dev/null
+++ b/src/main/java/org/cotato/csquiz/common/config/SchedulerConfig.java
@@ -0,0 +1,19 @@
+package org.cotato.csquiz.common.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.TaskScheduler;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
+
+@Configuration
+public class SchedulerConfig {
+
+    @Bean
+    public TaskScheduler taskScheduler() {
+        ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
+        scheduler.setPoolSize(10);
+        scheduler.setThreadNamePrefix("scheduled-task-");
+        scheduler.initialize();
+        return scheduler;
+    }
+}
diff --git a/src/main/java/org/cotato/csquiz/common/config/SecurityConfig.java b/src/main/java/org/cotato/csquiz/common/config/SecurityConfig.java
index 8a248f06..1e2793d9 100644
--- a/src/main/java/org/cotato/csquiz/common/config/SecurityConfig.java
+++ b/src/main/java/org/cotato/csquiz/common/config/SecurityConfig.java
@@ -1,11 +1,12 @@
 package org.cotato.csquiz.common.config;
 
+import lombok.RequiredArgsConstructor;
 import org.cotato.csquiz.common.config.filter.JwtAuthenticationFilter;
 import org.cotato.csquiz.common.config.filter.JwtAuthorizationFilter;
 import org.cotato.csquiz.common.config.filter.JwtExceptionFilter;
 import org.cotato.csquiz.common.config.jwt.JwtTokenProvider;
 import org.cotato.csquiz.common.config.jwt.RefreshTokenRepository;
-import lombok.RequiredArgsConstructor;
+import org.cotato.csquiz.common.error.handler.CustomAccessDeniedHandler;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.security.authentication.AuthenticationManager;
@@ -38,6 +39,7 @@ public class SecurityConfig {
     private final RefreshTokenRepository refreshTokenRepository;
     private final CorsFilter corsFilter;
     private final JwtAuthorizationFilter jwtAuthorizationFilter;
+    private final CustomAccessDeniedHandler customAccessDeniedHandler;
 
     @Bean
     public AuthenticationManager authenticationManager(HttpSecurity httpSecurity) throws Exception {
@@ -51,9 +53,11 @@ public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
         AuthenticationManagerBuilder sharedObject = http.getSharedObject(AuthenticationManagerBuilder.class);
         AuthenticationManager authenticationManager = sharedObject.build();
         http.authenticationManager(authenticationManager);
+
         http.cors();
+        http.exceptionHandling(exception ->
+                        exception.accessDeniedHandler(customAccessDeniedHandler));
         http.csrf().disable()
-                .cors().disable()
                 .formLogin().disable()
                 .addFilter(new JwtAuthenticationFilter(authenticationManager, jwtTokenProvider, refreshTokenRepository))
                 .addFilterBefore(jwtAuthorizationFilter, UsernamePasswordAuthenticationFilter.class)
@@ -83,6 +87,7 @@ public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
                         .requestMatchers("/v2/api/attendance").hasAnyRole("ADMIN")
                         .requestMatchers(new AntPathRequestMatcher("/v1/api/socket/token", "POST"))
                         .hasAnyRole("MEMBER", "EDUCATION", "ADMIN")
+                        .requestMatchers("/v2/api/events/attendances").hasAnyRole("MEMBER", "ADMIN", "EDUCATION")
                         .requestMatchers("/v1/api/socket/**").hasAnyRole("EDUCATION", "ADMIN")
                         .anyRequest().authenticated()
                 );
diff --git a/src/main/java/org/cotato/csquiz/common/error/ErrorCode.java b/src/main/java/org/cotato/csquiz/common/error/ErrorCode.java
index 50f28e69..11fc980e 100644
--- a/src/main/java/org/cotato/csquiz/common/error/ErrorCode.java
+++ b/src/main/java/org/cotato/csquiz/common/error/ErrorCode.java
@@ -92,6 +92,7 @@ public enum ErrorCode {
     ENUM_NOT_RESOLVED(HttpStatus.BAD_REQUEST, "S-005", "입력한 Enum이 존재하지 않습니다."),
     SCORER_LOCK_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "S-006", "득점자 락 획득 과정에서 에러 발생"),
     IMAGE_CONVERT_FAIL(HttpStatus.INTERNAL_SERVER_ERROR, "S-007", "로컬 이미지 변환에 실패했습니다"),
+    SSE_SEND_FAIL(HttpStatus.INTERNAL_SERVER_ERROR, "S-008", "서버 이벤트 전송간 오류 발생"),
     ;
 
     private final HttpStatus httpStatus;
diff --git a/src/main/java/org/cotato/csquiz/common/error/handler/CustomAccessDeniedHandler.java b/src/main/java/org/cotato/csquiz/common/error/handler/CustomAccessDeniedHandler.java
new file mode 100644
index 00000000..976e7cf4
--- /dev/null
+++ b/src/main/java/org/cotato/csquiz/common/error/handler/CustomAccessDeniedHandler.java
@@ -0,0 +1,21 @@
+package org.cotato.csquiz.common.error.handler;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.web.access.AccessDeniedHandler;
+import org.springframework.stereotype.Component;
+
+@Slf4j
+@Component
+public class CustomAccessDeniedHandler implements AccessDeniedHandler {
+
+    @Override
+    public void handle(HttpServletRequest request, HttpServletResponse response,
+                       AccessDeniedException accessDeniedException) throws IOException {
+        log.error("Access Denied Exception 발생");
+        response.sendError(HttpServletResponse.SC_FORBIDDEN, accessDeniedException.getMessage());
+    }
+}
diff --git a/src/main/java/org/cotato/csquiz/common/error/handler/GlobalExceptionHandler.java b/src/main/java/org/cotato/csquiz/common/error/handler/GlobalExceptionHandler.java
index 03e321fd..0afecac0 100644
--- a/src/main/java/org/cotato/csquiz/common/error/handler/GlobalExceptionHandler.java
+++ b/src/main/java/org/cotato/csquiz/common/error/handler/GlobalExceptionHandler.java
@@ -1,17 +1,17 @@
 package org.cotato.csquiz.common.error.handler;
 
 import com.amazonaws.services.s3.model.AmazonS3Exception;
-import org.cotato.csquiz.common.error.exception.AppException;
-import org.cotato.csquiz.common.error.exception.ImageException;
-import org.cotato.csquiz.common.error.response.ErrorResponse;
-import org.cotato.csquiz.common.error.response.MethodArgumentErrorResponse;
-import org.cotato.csquiz.common.error.response.MethodArgumentErrorResponse.FieldErrorResponse;
 import jakarta.persistence.EntityNotFoundException;
 import jakarta.servlet.http.HttpServletRequest;
 import java.sql.SQLException;
 import java.util.List;
 import lombok.extern.slf4j.Slf4j;
 import org.cotato.csquiz.common.error.ErrorCode;
+import org.cotato.csquiz.common.error.exception.AppException;
+import org.cotato.csquiz.common.error.exception.ImageException;
+import org.cotato.csquiz.common.error.response.ErrorResponse;
+import org.cotato.csquiz.common.error.response.MethodArgumentErrorResponse;
+import org.cotato.csquiz.common.error.response.MethodArgumentErrorResponse.FieldErrorResponse;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.HttpStatusCode;
@@ -94,4 +94,3 @@ public ResponseEntity<ErrorResponse> handleAmazonS3Exception(AmazonS3Exception e
         return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorResponse);
     }
 }
-
diff --git a/src/main/java/org/cotato/csquiz/common/idempotency/CustomServletWrappingFilter.java b/src/main/java/org/cotato/csquiz/common/idempotency/CustomServletWrappingFilter.java
index 6f285d8f..74b197a3 100644
--- a/src/main/java/org/cotato/csquiz/common/idempotency/CustomServletWrappingFilter.java
+++ b/src/main/java/org/cotato/csquiz/common/idempotency/CustomServletWrappingFilter.java
@@ -11,6 +11,9 @@
 
 @Component
 public class CustomServletWrappingFilter extends OncePerRequestFilter {
+
+    private static final String EVENT_PATH = "/v2/api/events";
+
     @Override
     protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
             throws ServletException, IOException {
@@ -20,4 +23,9 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
 
         responseWrapper.copyBodyToResponse();
     }
+
+    @Override
+    protected boolean shouldNotFilter(HttpServletRequest request) {
+        return request.getRequestURI().startsWith(EVENT_PATH);
+    }
 }
diff --git a/src/main/java/org/cotato/csquiz/common/S3/S3Config.java b/src/main/java/org/cotato/csquiz/common/s3/S3Config.java
similarity index 96%
rename from src/main/java/org/cotato/csquiz/common/S3/S3Config.java
rename to src/main/java/org/cotato/csquiz/common/s3/S3Config.java
index 3aa0815d..e49cc838 100644
--- a/src/main/java/org/cotato/csquiz/common/S3/S3Config.java
+++ b/src/main/java/org/cotato/csquiz/common/s3/S3Config.java
@@ -1,4 +1,4 @@
-package org.cotato.csquiz.common.S3;
+package org.cotato.csquiz.common.s3;
 
 import com.amazonaws.auth.AWSStaticCredentialsProvider;
 import com.amazonaws.auth.BasicAWSCredentials;
diff --git a/src/main/java/org/cotato/csquiz/common/S3/S3Uploader.java b/src/main/java/org/cotato/csquiz/common/s3/S3Uploader.java
similarity index 98%
rename from src/main/java/org/cotato/csquiz/common/S3/S3Uploader.java
rename to src/main/java/org/cotato/csquiz/common/s3/S3Uploader.java
index ab63883a..117f94f7 100644
--- a/src/main/java/org/cotato/csquiz/common/S3/S3Uploader.java
+++ b/src/main/java/org/cotato/csquiz/common/s3/S3Uploader.java
@@ -1,4 +1,4 @@
-package org.cotato.csquiz.common.S3;
+package org.cotato.csquiz.common.s3;
 
 import static org.cotato.csquiz.common.util.FileUtil.extractFileExtension;
 import static org.cotato.csquiz.common.util.FileUtil.isImageFileExtension;
diff --git a/src/main/java/org/cotato/csquiz/common/SchedulerService.java b/src/main/java/org/cotato/csquiz/common/schedule/SchedulerService.java
similarity index 65%
rename from src/main/java/org/cotato/csquiz/common/SchedulerService.java
rename to src/main/java/org/cotato/csquiz/common/schedule/SchedulerService.java
index ddf97bf6..e16d978e 100644
--- a/src/main/java/org/cotato/csquiz/common/SchedulerService.java
+++ b/src/main/java/org/cotato/csquiz/common/schedule/SchedulerService.java
@@ -1,16 +1,21 @@
-package org.cotato.csquiz.common;
+package org.cotato.csquiz.common.schedule;
 
+import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.util.Date;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.cotato.csquiz.common.sse.SseSender;
+import org.cotato.csquiz.domain.attendance.enums.DeadLine;
 import org.cotato.csquiz.domain.auth.entity.RefusedMember;
-import org.cotato.csquiz.domain.education.service.EducationService;
-import org.cotato.csquiz.domain.education.service.QuizService;
-import org.cotato.csquiz.domain.education.service.SocketService;
 import org.cotato.csquiz.domain.auth.enums.MemberRole;
 import org.cotato.csquiz.domain.auth.repository.MemberRepository;
 import org.cotato.csquiz.domain.auth.repository.RefusedMemberRepository;
+import org.cotato.csquiz.domain.education.service.EducationService;
+import org.springframework.scheduling.TaskScheduler;
 import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -24,6 +29,8 @@ public class SchedulerService {
     private final RefusedMemberRepository refusedMemberRepository;
     private final MemberRepository memberRepository;
     private final EducationService educationService;
+    private final SseSender sseSender;
+    private final TaskScheduler taskScheduler;
 
     @Transactional
     @Scheduled(cron = "0 0 0 * * *")
@@ -47,4 +54,13 @@ public void closeAllCsQuiz() {
         educationService.closeAllFlags();
         log.info("[ CS 퀴즈 모두 닫기 Scheduler 완료 ]");
     }
+
+    // sessionDate 18시 50분에 출결을 구독 중인 부원들에게 출결 입력 시작 알림을 전송하는 스케줄러
+    public void scheduleSessionNotification(LocalDate sessionDate) {
+        LocalDateTime notificationTime = LocalDateTime.of(sessionDate, DeadLine.ATTENDANCE_START_TIME.getTime());
+
+        ZonedDateTime zonedDateTime = notificationTime.atZone(ZoneId.of("Asia/Seoul"));
+
+        taskScheduler.schedule(() -> sseSender.sendNotification(notificationTime), zonedDateTime.toInstant());
+    }
 }
diff --git a/src/main/java/org/cotato/csquiz/common/sse/SseAttendanceRepository.java b/src/main/java/org/cotato/csquiz/common/sse/SseAttendanceRepository.java
new file mode 100644
index 00000000..ba25d205
--- /dev/null
+++ b/src/main/java/org/cotato/csquiz/common/sse/SseAttendanceRepository.java
@@ -0,0 +1,33 @@
+package org.cotato.csquiz.common.sse;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
+
+@Repository
+@RequiredArgsConstructor
+public class SseAttendanceRepository {
+
+    private final Map<Long, SseEmitter> attendances = new ConcurrentHashMap<>();
+
+    public Optional<SseEmitter> findById(final Long memberId) {
+        return Optional.ofNullable(attendances.get(memberId));
+    }
+
+    public void save(Long memberId, SseEmitter sseEmitter) {
+        attendances.put(memberId, sseEmitter);
+    }
+
+    public void deleteById(Long memberId) {
+        attendances.remove(memberId);
+    }
+
+    public List<SseEmitter> findAll() {
+        return attendances.values().stream()
+                .toList();
+    }
+}
diff --git a/src/main/java/org/cotato/csquiz/common/sse/SseSender.java b/src/main/java/org/cotato/csquiz/common/sse/SseSender.java
new file mode 100644
index 00000000..b98fe1a3
--- /dev/null
+++ b/src/main/java/org/cotato/csquiz/common/sse/SseSender.java
@@ -0,0 +1,77 @@
+package org.cotato.csquiz.common.sse;
+
+import jakarta.persistence.EntityNotFoundException;
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
+import lombok.RequiredArgsConstructor;
+import org.cotato.csquiz.api.event.dto.AttendanceStatusInfo;
+import org.cotato.csquiz.common.error.ErrorCode;
+import org.cotato.csquiz.common.error.exception.AppException;
+import org.cotato.csquiz.domain.attendance.entity.Attendance;
+import org.cotato.csquiz.domain.attendance.enums.AttendanceOpenStatus;
+import org.cotato.csquiz.domain.attendance.repository.AttendanceRepository;
+import org.cotato.csquiz.domain.attendance.util.AttendanceUtil;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.DataWithMediaType;
+import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
+
+@Component
+@RequiredArgsConstructor
+public class SseSender {
+
+    private static final String ATTENDANCE_STATUS = "AttendanceStatus";
+    private final SseAttendanceRepository sseAttendanceRepository;
+
+    private final AttendanceRepository attendanceRepository;
+
+    public void sendInitialAttendanceStatus(SseEmitter sseEmitter) {
+        Optional<Attendance> maybeAttendance = attendanceRepository.findByAttendanceDeadLineDate(LocalDateTime.now());
+
+        if (maybeAttendance.isEmpty()) {
+            send(sseEmitter, SseEmitter.event()
+                    .name(ATTENDANCE_STATUS)
+                    .data(AttendanceStatusInfo.builder()
+                            .openStatus(AttendanceOpenStatus.CLOSED)
+                            .build())
+                    .build());
+            return;
+        }
+
+        send(sseEmitter, SseEmitter.event()
+                .name(ATTENDANCE_STATUS)
+                .data(AttendanceStatusInfo.builder()
+                        .attendanceId(maybeAttendance.get().getId())
+                        .openStatus(AttendanceUtil.getAttendanceOpenStatus(maybeAttendance.get(), LocalDateTime.now()))
+                        .build())
+                .build());
+    }
+
+    // sessionDate 6시 50분에 출결을 구독 중인 부원들에게 출결 입력 시작 알림을 전송한다.
+    public void sendNotification(LocalDateTime notificationDate) {
+        Attendance attendance = attendanceRepository.findByAttendanceDeadLineDate(notificationDate)
+                .orElseThrow(() -> new EntityNotFoundException("해당 날짜에 진행하는 출석이 없습니다."));
+
+        Set<DataWithMediaType> data = SseEmitter.event()
+                .name(ATTENDANCE_STATUS)
+                .data(AttendanceStatusInfo.builder()
+                        .attendanceId(attendance.getId())
+                        .openStatus(AttendanceOpenStatus.OPEN)
+                        .build())
+                .build();
+
+        List<SseEmitter> sseEmitters = sseAttendanceRepository.findAll();
+        for (SseEmitter sseEmitter : sseEmitters) {
+            send(sseEmitter, data);
+        }
+    }
+
+    private void send(SseEmitter sseEmitter, Set<DataWithMediaType> data) {
+        try {
+            sseEmitter.send(data);
+        } catch (Exception e) {
+            throw new AppException(ErrorCode.SSE_SEND_FAIL);
+        }
+    }
+}
diff --git a/src/main/java/org/cotato/csquiz/common/sse/SseService.java b/src/main/java/org/cotato/csquiz/common/sse/SseService.java
new file mode 100644
index 00000000..daad3b45
--- /dev/null
+++ b/src/main/java/org/cotato/csquiz/common/sse/SseService.java
@@ -0,0 +1,40 @@
+package org.cotato.csquiz.common.sse;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class SseService {
+
+    private static final Long DEFAULT_TIMEOUT = 60 * 1000 * 60L;
+
+    private final SseAttendanceRepository sseAttendanceRepository;
+    private final SseSender sseSender;
+
+    public SseEmitter subscribeAttendance(final Long memberId) {
+        SseEmitter sseEmitter = new SseEmitter(DEFAULT_TIMEOUT);
+
+        setBaseEmitterConfiguration(memberId, sseEmitter);
+        sseAttendanceRepository.save(memberId, sseEmitter);
+
+        sseSender.sendInitialAttendanceStatus(sseEmitter);
+
+        return sseEmitter;
+    }
+
+    private void setBaseEmitterConfiguration(Long memberId, SseEmitter sseEmitter) {
+        sseEmitter.onCompletion(() -> {
+            log.info("---- [memberId]: {} on completion callback ----", memberId);
+            sseAttendanceRepository.deleteById(memberId);
+        });
+
+        sseEmitter.onTimeout(() -> {
+            log.info("---- [memberId]: {} on timeout callback ----", memberId);
+            sseEmitter.complete();
+        });
+    }
+}
diff --git a/src/main/java/org/cotato/csquiz/domain/attendance/entity/Attendance.java b/src/main/java/org/cotato/csquiz/domain/attendance/entity/Attendance.java
index df8a0315..b04b7368 100644
--- a/src/main/java/org/cotato/csquiz/domain/attendance/entity/Attendance.java
+++ b/src/main/java/org/cotato/csquiz/domain/attendance/entity/Attendance.java
@@ -5,6 +5,7 @@
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import java.time.LocalDate;
 import java.time.LocalDateTime;
 import lombok.AccessLevel;
 import lombok.Builder;
@@ -36,7 +37,8 @@ public class Attendance extends BaseTimeEntity {
     private Long sessionId;
 
     @Builder
-    public Attendance(LocalDateTime attendanceDeadLine, LocalDateTime lateDeadLine, Location location, Session session) {
+    public Attendance(LocalDateTime attendanceDeadLine, LocalDateTime lateDeadLine, Location location,
+                      Session session) {
         this.attendanceDeadLine = attendanceDeadLine;
         this.lateDeadLine = lateDeadLine;
         this.location = location;
diff --git a/src/main/java/org/cotato/csquiz/domain/attendance/enums/DeadLine.java b/src/main/java/org/cotato/csquiz/domain/attendance/enums/DeadLine.java
index 63fa5464..e1a5b28d 100644
--- a/src/main/java/org/cotato/csquiz/domain/attendance/enums/DeadLine.java
+++ b/src/main/java/org/cotato/csquiz/domain/attendance/enums/DeadLine.java
@@ -11,8 +11,8 @@
 public enum DeadLine {
 
     ATTENDANCE_START_TIME(LocalTime.of(18, 50, 0), "고정 출석 시작 시간"),
-    DEFAULT_ATTENDANCE_DEADLINE(LocalTime.of(19, 5, 59), "기본 출석 마감 시간"),
-    DEFAULT_LATE_DEADLINE(LocalTime.of(19,20,59),"기본 지각 마감 시간"),
+    DEFAULT_ATTENDANCE_DEADLINE(LocalTime.of(19, 5, 0), "기본 출석 마감 시간"),
+    DEFAULT_LATE_DEADLINE(LocalTime.of(19,20,0),"기본 지각 마감 시간"),
     ATTENDANCE_END_TIME(LocalTime.of(20, 0,0), "고정 세션 종료 시간")
     ;
 
diff --git a/src/main/java/org/cotato/csquiz/domain/attendance/repository/AttendanceRepository.java b/src/main/java/org/cotato/csquiz/domain/attendance/repository/AttendanceRepository.java
index 63882a31..25c0b9b1 100644
--- a/src/main/java/org/cotato/csquiz/domain/attendance/repository/AttendanceRepository.java
+++ b/src/main/java/org/cotato/csquiz/domain/attendance/repository/AttendanceRepository.java
@@ -1,6 +1,8 @@
 package org.cotato.csquiz.domain.attendance.repository;
 
+import java.time.LocalDateTime;
 import java.util.List;
+import java.util.Optional;
 import org.cotato.csquiz.domain.attendance.entity.Attendance;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
@@ -9,4 +11,9 @@
 public interface AttendanceRepository extends JpaRepository<Attendance, Long> {
     @Query("select a from Attendance a where a.sessionId in :sessionIds")
     List<Attendance> findAllBySessionIdsInQuery(@Param("sessionIds") List<Long> sessionIds);
+
+    @Query("SELECT a FROM Attendance a WHERE DATE(a.attendanceDeadLine) = DATE(:time)")
+    Optional<Attendance> findByAttendanceDeadLineDate(@Param("time") LocalDateTime time);
+
+    Optional<Attendance> findBySessionId(Long sessionId);
 }
diff --git a/src/main/java/org/cotato/csquiz/domain/attendance/service/AttendanceAdminService.java b/src/main/java/org/cotato/csquiz/domain/attendance/service/AttendanceAdminService.java
index a11e87fc..324fd891 100644
--- a/src/main/java/org/cotato/csquiz/domain/attendance/service/AttendanceAdminService.java
+++ b/src/main/java/org/cotato/csquiz/domain/attendance/service/AttendanceAdminService.java
@@ -33,7 +33,8 @@ public class AttendanceAdminService {
 
     @Transactional
     public void addAttendance(Session session, Location location, AttendanceDeadLineDto attendanceDeadLine) {
-        AttendanceUtil.validateAttendanceTime(attendanceDeadLine.attendanceDeadLine(), attendanceDeadLine.lateDeadLine());
+        AttendanceUtil.validateAttendanceTime(attendanceDeadLine.attendanceDeadLine(),
+                attendanceDeadLine.lateDeadLine());
 
         Attendance attendance = Attendance.builder()
                 .session(session)
@@ -47,26 +48,33 @@ public void addAttendance(Session session, Location location, AttendanceDeadLine
         attendanceRepository.save(attendance);
     }
 
-
     @Transactional
-    public void updateAttendance(UpdateAttendanceRequest request) {
+    public void updateAttendanceByAttendanceId(UpdateAttendanceRequest request) {
         Attendance attendance = attendanceRepository.findById(request.attendanceId())
                 .orElseThrow(() -> new EntityNotFoundException("해당 출석 정보가 존재하지 않습니다"));
         Session attendanceSession = sessionRepository.findById(attendance.getSessionId())
                 .orElseThrow(() -> new EntityNotFoundException("출석과 연결된 세션을 찾을 수 없습니다"));
 
-        AttendanceUtil.validateAttendanceTime(request.attendTime().attendanceDeadLine(), request.attendTime().lateDeadLine());
+        updateAttendance(attendanceSession, attendance, request
+                .attendTime(), request.location());
+    }
+
+    @Transactional
+    public void updateAttendance(Session attendanceSession, Attendance attendance,
+                                 AttendanceDeadLineDto attendanceDeadLine, Location location) {
+        AttendanceUtil.validateAttendanceTime(attendanceDeadLine.attendanceDeadLine(),
+                attendanceDeadLine.lateDeadLine());
 
         if (attendanceSession.getSessionDate() == null) {
             throw new AppException(ErrorCode.SESSION_DATE_NOT_FOUND);
         }
 
         attendance.updateDeadLine(
-                LocalDateTime.of(attendanceSession.getSessionDate(), request.attendTime().attendanceDeadLine())
+                LocalDateTime.of(attendanceSession.getSessionDate(), attendanceDeadLine.attendanceDeadLine())
                         .plusSeconds(DEFAULT_ATTEND_SECOND),
-                LocalDateTime.of(attendanceSession.getSessionDate(), request.attendTime()
-                        .lateDeadLine()).plusSeconds(DEFAULT_ATTEND_SECOND));
-        attendance.updateLocation(request.location());
+                LocalDateTime.of(attendanceSession.getSessionDate(), attendanceDeadLine.lateDeadLine())
+                        .plusSeconds(DEFAULT_ATTEND_SECOND));
+        attendance.updateLocation(location);
 
         attendanceRecordService.updateAttendanceStatus(attendance);
     }
diff --git a/src/main/java/org/cotato/csquiz/domain/auth/service/MemberService.java b/src/main/java/org/cotato/csquiz/domain/auth/service/MemberService.java
index 4da47ec1..92a94400 100644
--- a/src/main/java/org/cotato/csquiz/domain/auth/service/MemberService.java
+++ b/src/main/java/org/cotato/csquiz/domain/auth/service/MemberService.java
@@ -7,7 +7,7 @@
 import org.cotato.csquiz.api.admin.dto.MemberInfoResponse;
 import org.cotato.csquiz.api.member.dto.MemberInfo;
 import org.cotato.csquiz.api.member.dto.MemberMyPageInfoResponse;
-import org.cotato.csquiz.common.S3.S3Uploader;
+import org.cotato.csquiz.common.s3.S3Uploader;
 import org.cotato.csquiz.api.member.dto.UpdatePhoneNumberRequest;
 import org.cotato.csquiz.common.config.jwt.JwtTokenProvider;
 import org.cotato.csquiz.common.entity.S3Info;
diff --git a/src/main/java/org/cotato/csquiz/domain/education/service/QuizService.java b/src/main/java/org/cotato/csquiz/domain/education/service/QuizService.java
index fbfc2a06..fa15a422 100644
--- a/src/main/java/org/cotato/csquiz/domain/education/service/QuizService.java
+++ b/src/main/java/org/cotato/csquiz/domain/education/service/QuizService.java
@@ -47,7 +47,7 @@
 import org.cotato.csquiz.common.error.exception.AppException;
 import org.cotato.csquiz.common.error.ErrorCode;
 import org.cotato.csquiz.common.error.exception.ImageException;
-import org.cotato.csquiz.common.S3.S3Uploader;
+import org.cotato.csquiz.common.s3.S3Uploader;
 import org.cotato.csquiz.domain.auth.service.MemberService;
 import org.cotato.csquiz.domain.education.util.AnswerUtil;
 import org.springframework.stereotype.Service;
diff --git a/src/main/java/org/cotato/csquiz/domain/generation/entity/Session.java b/src/main/java/org/cotato/csquiz/domain/generation/entity/Session.java
index a463f8a6..b6525dda 100644
--- a/src/main/java/org/cotato/csquiz/domain/generation/entity/Session.java
+++ b/src/main/java/org/cotato/csquiz/domain/generation/entity/Session.java
@@ -89,4 +89,12 @@ public void updateSessionContents(SessionContents sessionContents) {
     public void updateSessionTitle(String title) {
         this.title = title;
     }
+
+    public void updateSessionDate(LocalDate sessionDate) {
+        this.sessionDate = sessionDate;
+    }
+
+    public void updateSessionPlace(String placeName) {
+        this.placeName = placeName;
+    }
 }
diff --git a/src/main/java/org/cotato/csquiz/domain/generation/service/SessionImageService.java b/src/main/java/org/cotato/csquiz/domain/generation/service/SessionImageService.java
index 86890a50..2318caeb 100644
--- a/src/main/java/org/cotato/csquiz/domain/generation/service/SessionImageService.java
+++ b/src/main/java/org/cotato/csquiz/domain/generation/service/SessionImageService.java
@@ -16,7 +16,7 @@
 import org.cotato.csquiz.api.session.dto.DeleteSessionImageRequest;
 import org.cotato.csquiz.api.session.dto.UpdateSessionImageOrderInfoRequest;
 import org.cotato.csquiz.api.session.dto.UpdateSessionImageOrderRequest;
-import org.cotato.csquiz.common.S3.S3Uploader;
+import org.cotato.csquiz.common.s3.S3Uploader;
 import org.cotato.csquiz.common.entity.S3Info;
 import org.cotato.csquiz.common.error.ErrorCode;
 import org.cotato.csquiz.common.error.exception.AppException;
diff --git a/src/main/java/org/cotato/csquiz/domain/generation/service/SessionService.java b/src/main/java/org/cotato/csquiz/domain/generation/service/SessionService.java
index dff5ebbb..18dacacd 100644
--- a/src/main/java/org/cotato/csquiz/domain/generation/service/SessionService.java
+++ b/src/main/java/org/cotato/csquiz/domain/generation/service/SessionService.java
@@ -1,6 +1,8 @@
 package org.cotato.csquiz.domain.generation.service;
 
 import jakarta.persistence.EntityNotFoundException;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
@@ -14,8 +16,12 @@
 import org.cotato.csquiz.api.session.dto.UpdateSessionNumberRequest;
 import org.cotato.csquiz.api.session.dto.UpdateSessionRequest;
 import org.cotato.csquiz.common.error.exception.ImageException;
+import org.cotato.csquiz.common.schedule.SchedulerService;
 import org.cotato.csquiz.domain.attendance.embedded.Location;
+import org.cotato.csquiz.domain.attendance.entity.Attendance;
+import org.cotato.csquiz.domain.attendance.repository.AttendanceRepository;
 import org.cotato.csquiz.domain.attendance.service.AttendanceAdminService;
+import org.cotato.csquiz.domain.attendance.service.AttendanceRecordService;
 import org.cotato.csquiz.domain.education.entity.Education;
 import org.cotato.csquiz.domain.education.service.EducationService;
 import org.cotato.csquiz.domain.generation.embedded.SessionContents;
@@ -41,6 +47,9 @@ public class SessionService {
     private final AttendanceAdminService attendanceAdminService;
     private final EducationService educationService;
     private final SessionImageService sessionImageService;
+    private final SchedulerService schedulerService;
+    private final AttendanceRepository attendanceRepository;
+    private final AttendanceRecordService attendanceRecordService;
 
     @Transactional
     public AddSessionResponse addSession(AddSessionRequest request) throws ImageException {
@@ -82,6 +91,7 @@ public AddSessionResponse addSession(AddSessionRequest request) throws ImageExce
                 .build();
 
         attendanceAdminService.addAttendance(session, location, attendanceDeadLine);
+        schedulerService.scheduleSessionNotification(savedSession.getSessionDate());
 
         return AddSessionResponse.from(savedSession);
     }
@@ -104,6 +114,8 @@ public void updateSession(UpdateSessionRequest request) {
 
         session.updateDescription(request.description());
         session.updateSessionTitle(request.title());
+        session.updateSessionPlace(request.placeName());
+
         session.updateSessionContents(SessionContents.builder()
                 .csEducation(request.csEducation())
                 .devTalk(request.devTalk())
@@ -111,9 +123,29 @@ public void updateSession(UpdateSessionRequest request) {
                 .networking(request.networking())
                 .build());
 
+        updateSessionDate(session, request.sessionDate(), request.attendTime());
         sessionRepository.save(session);
     }
 
+    public void updateSessionDate(Session session, LocalDate newDate, AttendanceDeadLineDto newDeadline) {
+        Attendance findAttendance = attendanceRepository.findBySessionId(session.getId())
+                .orElseThrow(() -> new EntityNotFoundException("해당 세션의 출석이 존재하지 않습니다"));
+
+        // 날짜가 바뀌지 않았고, 출결 시간이 모두 동일한 경우
+        if (newDate.equals(session.getSessionDate()) &&
+                findAttendance.getAttendanceDeadLine().toLocalTime().equals(newDeadline.attendanceDeadLine()) &&
+                findAttendance.getLateDeadLine().toLocalTime().equals(newDeadline.lateDeadLine())) {
+            return;
+        }
+        session.updateSessionDate(newDate);
+
+        LocalDateTime newAttendanceDeadline = LocalDateTime.of(newDate, newDeadline.attendanceDeadLine());
+        LocalDateTime newLateDeadline = LocalDateTime.of(newDate, newDeadline.attendanceDeadLine());
+        findAttendance.updateDeadLine(newAttendanceDeadline, newLateDeadline);
+
+        attendanceRecordService.updateAttendanceStatus(findAttendance);
+    }
+
     public List<SessionListResponse> findSessionsByGenerationId(Long generationId) {
         Generation generation = generationRepository.findById(generationId)
                 .orElseThrow(() -> new EntityNotFoundException("해당 기수를 찾을 수 없습니다."));
diff --git a/src/main/resources/application-local.yml b/src/main/resources/application-local.yml
index 953cb6f8..fada2f74 100644
--- a/src/main/resources/application-local.yml
+++ b/src/main/resources/application-local.yml
@@ -22,3 +22,7 @@ spring:
 springdoc:
   swagger-ui:
     enabled: true
+
+logging:
+  level:
+    org.springframework.security: DEBUG
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index a747069e..b609b164 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -4,6 +4,9 @@ spring:
 
 # 로컬, 개발, 운영 환경의 공통된 설정
 
+  jpa:
+    open-in-view: false
+
   data:
     redis:
       host: localhost