Org-Wide Time Zone Setup
From the home screen, click on the gear icon in the top right corner and click Setup.
Under "Company Settings" click Business Hours. Click Edit, select the correct time zone, and click Save.
User Time Zone Setup
Individual users can change their time zone settings independent of the organization default.
From the Home screen, click on the Profile Icon in the top right corner and click Settings.
Click on Language & Time Zone under the “My Personal Information” tab.
Select the correct Time Zone and click Save.