NOOR Hello.
Your tracker should be configured to timezone 0 (UTC) no matter what your current location is. You can do it for example by sending a particular SMS-command according to instructions for your tracker and your mobile operator rules or via Setbox (Unit menu – Tools – Setbox) if there is such a command for your device there.
In Setbox you should press the Send button (with a blue plane above) and after that there will appear 2 tabs: PENDING which means that the command was sent but not received yet, and CURRENT which shows set current conditions. It’s important after the command has been sent via Setbox not to give commands to reset your tracker and its settings because after that all the settings will be reset.