Google Calendar API日历中的错误时间

Question

我正在使用Google Calendar API v3（C＃）将事件插入用户日历。我正在发送这样的事件。

{
   "AnyoneCanAddSelf":null,
   "Attendees":null,
   "AttendeesOmitted":null,
   "ColorId":null,
   "CreatedRaw":null,
   "Created":null,
   "Creator":null,
   "Description":"Electrolysis 1",
   "End":{
      "Date":null,
      "DateTimeRaw":"2020-09-16T11:15:00.000Z",
      "DateTime":"2020-09-16T11:15:00.0000000+00:00",
      "TimeZone":"Europe/London",
      "ETag":null,
      "_typeTag":"EventDateTime"
   },
   "EndTimeUnspecified":null,
   "ETag":null,
   "ExtendedProperties":null,
   "Gadget":null,
   "GuestsCanInviteOthers":null,
   "GuestsCanModify":null,
   "GuestsCanSeeOtherGuests":null,
   "HangoutLink":null,
   "HtmlLink":null,
   "ICalUID":null,
   "Id":null,
   "Kind":null,
   "Location":null,
   "Locked":null,
   "Organizer":null,
   "OriginalStartTime":null,
   "PrivateCopy":null,
   "Recurrence":null,
   "RecurringEventId":null,
   "Reminders":null,
   "Sequence":null,
   "Source":null,
   "Start":{
      "Date":null,
      "DateTimeRaw":"2020-09-16T11:00:00.000Z",
      "DateTime":"2020-09-16T11:00:00.0000000+00:00",
      "TimeZone":"Europe/London",
      "ETag":null,
      "_typeTag":"EventDateTime"
   },
   "Status":null,
   "Summary":"Ann Smith",
   "Transparency":null,
   "UpdatedRaw":null,
   "Updated":null,
   "Visibility":null
}

当该事件显示在Google日历中时，它显示在中午12点，而不是预期的上午11点。我假设它与时区有关，但日历时区与我所经过的时区相同。

以下是Google日历中设置的时区的屏幕截图。