The Account time zone is used for displaying monthly usage, as well as message scheduling and reporting send-time references. It also comes into play when you use the socially aware sending option to restrict your message sending to a window of sociable hours.
How to Change the Account Time Zone
1. In the menu, click on the icon, then select Account:
2. Select the General tab.
3. Find where it says Account time zone, and click on the Edit icon.
4. Use the dropdown menu to locate the required time zone.
5. Now Save and you're done: