Timezone for time_tracking fields

Hello, everyone!

I’m writing a script to collect timetracking data for team members. Our timezone is UTC-3

Is there any documentation about this topic (the timezone of the time_tracking columns)? When the data is requested, some datetime fields seems to be corrected (UTC-3), but others are in UTC.

AFAIK all date-time data is stored internally in UTC. When reteievd through the UI it is converted to the user TZ. Do you retrieve the data through the UI or the API?