diff --git a/src/main/java/com/example/egobook_be/domain/diary/dto/DiaryCalendarResDto.java b/src/main/java/com/example/egobook_be/domain/diary/dto/DiaryCalendarResDto.java
index 5e55ef0..c01dc4d 100644
--- a/src/main/java/com/example/egobook_be/domain/diary/dto/DiaryCalendarResDto.java
+++ b/src/main/java/com/example/egobook_be/domain/diary/dto/DiaryCalendarResDto.java
@@ -1,5 +1,6 @@
 package com.example.egobook_be.domain.diary.dto;
 
+import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Builder;
 
 import java.time.LocalDate;
@@ -8,11 +9,13 @@
 
 @Builder
 public record DiaryCalendarResDto (
+        @JsonFormat(pattern = "yyyy-MM")
         YearMonth month,
         List<DailyTopEmotionResDto> days
 ) {
     @Builder
     public record DailyTopEmotionResDto (
+            @JsonFormat(pattern = "yyyy-MM-dd")
             LocalDate date,
             Integer emotionLevel
     ) {}