To change the SAP system’s time zone, we should maintenance the SAP table TTZCU via tcode SM30 to do this follow the steps below…

1 – Logon to the related SAP system and start transaction code SM30

2 – Enter the table name TTZCU and press the maintain button

3 – Continue the next popup screen with YES button

4 – Next screen will help you to change the “Time Zone” settings

5 – Select the time zone which is suitable for you

6 – SAVE and Restart your SAP system.

Now you can check the result via SAPGUI –> System –> Status