fix dates

src/components/upload-zone.tsx

@@ -75,9 +75,9 @@ export function UploadZone() {
       // Remove the redirect flag after restoring
       sessionStorage.removeItem("schedulesync_oauth_redirect");
     }
-    // eslint-disable-next-line react-hooks/exhaustive-deps
     // Intentionally only depend on isSignedIn. We check preview/fileName/events for null
     // to determine if restoration is needed, but don't want to re-run when they change.
+    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [isSignedIn]);
 
   // Save state to sessionStorage before OAuth redirect
@@ -324,7 +324,7 @@ export function UploadZone() {
           {analyzeSchedule.isPending ? (
             <>
               <Loader2 className="size-5 animate-spin" />
-              Analyzing schedule...
+              Analyzing schedule... Don&apos;t close the page.
             </>
           ) : (
             <>

src/server/api/routers/schedule.ts

@@ -82,15 +82,17 @@ export const scheduleRouter = createTRPCRouter({
         }
 
         // Create a new calendar
+        const timezone = input.timezone ?? "UTC";
         const calendarId = await createCalendar(
           accessToken,
           input.calendarName,
+          timezone,
         );
 
         // Add events to the calendar
         await addEventsToCalendar(accessToken, calendarId, input.events, {
           repeatWeeks: input.repeatWeeks,
-          timezone: input.timezone ?? "UTC",
+          timezone,
           startDate: input.startDate,
         });
 

src/server/services/google-calendar.ts

@@ -2,12 +2,27 @@ import { google } from "googleapis";
 import type { ScheduleEvent } from "./schedule-analyzer";
 import { parse, addWeeks } from "date-fns";
 
+/**
+ * Formats a Date as a local datetime string without timezone suffix.
+ * Google Calendar will interpret this time using the provided timeZone parameter.
+ */
+function formatDateTimeLocal(date: Date): string {
+  const year = date.getFullYear();
+  const month = String(date.getMonth() + 1).padStart(2, "0");
+  const day = String(date.getDate()).padStart(2, "0");
+  const hours = String(date.getHours()).padStart(2, "0");
+  const minutes = String(date.getMinutes()).padStart(2, "0");
+  const seconds = String(date.getSeconds()).padStart(2, "0");
+  return `${year}-${month}-${day}T${hours}:${minutes}:${seconds}`;
+}
+
 /**
  * Creates a new Google Calendar
  */
 export async function createCalendar(
   accessToken: string,
   calendarName: string,
+  timezone = "UTC",
 ): Promise<string> {
   const calendar = google.calendar({ version: "v3" });
 
@@ -18,7 +33,7 @@ export async function createCalendar(
     auth,
     requestBody: {
       summary: calendarName,
-      timeZone: Intl.DateTimeFormat().resolvedOptions().timeZone,
+      timeZone: timezone,
     },
   });
 
@@ -95,11 +110,11 @@ async function createOneTimeEvent(
       location: event.location,
       description: buildEventDescription(event),
       start: {
-        dateTime: startDateTime.toISOString(),
+        dateTime: formatDateTimeLocal(startDateTime),
         timeZone: timezone,
       },
       end: {
-        dateTime: endDateTime.toISOString(),
+        dateTime: formatDateTimeLocal(endDateTime),
         timeZone: timezone,
       },
     },
@@ -162,11 +177,11 @@ async function createRecurringEvent(
       location: event.location,
       description: buildEventDescription(event),
       start: {
-        dateTime: startDateTime.toISOString(),
+        dateTime: formatDateTimeLocal(startDateTime),
         timeZone: timezone,
       },
       end: {
-        dateTime: endDateTime.toISOString(),
+        dateTime: formatDateTimeLocal(endDateTime),
         timeZone: timezone,
       },
       recurrence: [rrule],