The time zone of the application is UTC (Universal Coordinated Time) and automatically converts to local time. This means you will see all the calls in your local time zone. At the database level, all times are stored in the UTC time zone.
For example, if a call is made at 14:00 UTC and you are in San Francisco (USA), you will see the time of the call at 08:00 as PST (Pacific Standard Time) is UTC-8. If you are in Romania (ROU) you will see the call at 16:00, as Romania is UTC+2.