How do i know if an event is an all day meeting? (Google Calendar)

Question

In the event documentation here it says that the start.date field will be poplulated if an event is an all-day event. But when i create an all-day meeting and then query it with the https://www.googleapis.com/calendar/v3/calendars/{calendar}/events/{event} url the start and end responses dont have a date field, they come back as:

 "start": {
  "dateTime": "2022-08-25T00:00:00+01:00",
  "timeZone": "Europe/London"
 },
 "end": {
  "dateTime": "2022-08-26T00:00:00+01:00",
  "timeZone": "Europe/London"
 },

Picture from the documentation below

Update:

I'm creating a meeting on my calendar, selecting all day then adding a room.

I'm then querying this event using the https://developers.google.com/calendar/api/v3/reference/events/ page. Here i'm putting in my calendar (my email) and the event id. The correct event is returned but the start and end dates come back as this:

Answer 1

This might be a bug:

All-day events containing a room don't include start.date and end.date fields, even though these should be populated in all-day events, according to the docs:

start.date: The date, in the format "yyyy-mm-dd", if this is an all-day event.

Issue Tracker:

I went ahead and filed an issue in Issue Tracker:

• All-day events containing a room don't include date field

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