mARTin-B78/My-Weekly-ToDo-List
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fix: Outlook event timezone offset on create/update responses

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Outlook Graph API returns datetimes in the user's timezone without Z suffix
by default. The sync path already requested UTC and appended Z, but
create/update responses did not. This caused the optimistic UI update to
show events 1 hour off until the next sync corrected it.

Fix: add Prefer: outlook.timezone="UTC" header to create/update calls
and normalize response datetimes with Z suffix.

v1.71.3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
mARTin 2026-03-25 00:03:17 +01:00
parent 92593cf616
commit 131f92bd72
2 changed files with 21 additions and 8 deletions
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2
package.json
View File

@ -1,6 +1,6 @@
{
"name": "my-weekly-todo-list",
"version": "1.71.2",
"version": "1.71.3",
"description": "A web-based weekly task management application that organizes to-dos and calendar events in a single, intuitive weekly view",
"main": "index.js",
"scripts": {

27
src/lib/outlook-calendar.ts
View File

@ -272,6 +272,17 @@ const ensureTimeZone = (dateTimeObj: any) => {
/**
* Create Outlook Event
*/
// Normalize Outlook response dateTime: ensure UTC dates have Z suffix
const normalizeOutlookDateTime = (dtObj: any) => {
if (!dtObj?.dateTime) return dtObj;
let dt = dtObj.dateTime;
// Outlook returns UTC datetimes without Z suffix — append it
if (dt && typeof dt === 'string' && dtObj.timeZone === 'UTC' && !dt.endsWith('Z')) {
dt = dt + 'Z';
}
return { dateTime: dt, timeZone: dtObj.timeZone };
};
export const createEvent = async (
accessToken: string,
calendarId: string,
@ -281,7 +292,8 @@ export const createEvent = async (
method: 'POST',
headers: {
'Authorization': `Bearer ${accessToken}`,
'Content-Type': 'application/json'
'Content-Type': 'application/json',
'Prefer': 'outlook.timezone="UTC"'
},
body: JSON.stringify({
subject: event.summary,
@ -325,8 +337,8 @@ export const createEvent = async (
id: created.id,
summary: created.subject,
description: created.bodyPreview,
start: created.start,
end: created.end,
start: normalizeOutlookDateTime(created.start),
end: normalizeOutlookDateTime(created.end),
location: created.location?.displayName,
allDay: created.isAllDay
};
@ -372,9 +384,10 @@ export const updateEvent = async (
} : {}),
});
const patchHeaders = {
const patchHeaders: Record<string, string> = {
'Authorization': `Bearer ${accessToken}`,
'Content-Type': 'application/json'
'Content-Type': 'application/json',
'Prefer': 'outlook.timezone="UTC"'
};
const encodedEventId = encodeURIComponent(eventId);
@ -402,8 +415,8 @@ export const updateEvent = async (
id: updated.id,
summary: updated.subject,
description: updated.bodyPreview,
start: updated.start,
end: updated.end,
start: normalizeOutlookDateTime(updated.start),
end: normalizeOutlookDateTime(updated.end),
location: updated.location?.displayName,
allDay: updated.isAllDay
};