Daylight saving time
In a REST-API response, the 'user date time' fields are shown in the ISO 8601 format where the time zone of the message's account is shown as an offset with respect to UTC.
UTC does not know daylight saving time. For a time zone that does know daylight saving time, the offset will be different for a date/time during summer time or during winter time.
Example
For a user in the Amsterdam time zone who requests a value during summer time, the date/time 'July 1st 2024 16:12 is shown as 2024-07-01T16:12:00+02:00.
In winter time, January 1st 2024 16:12 is shown as 2024-01-01T16:12:00+01:00