How to update your time zone settings in Salesforce
1. Click Setup
2. In Personal Setup, click My Personal Information > Personal Information
3. Click Edit
4. Scroll down to Locale Settings and use the drop-down menu to select a new Time Zone.
5. Click Save
How to update your time zone settings in Google
1. Open Google Calendar. In the list of Calendars on the left, click on the drop down arrow next to the appropriate calendar and select Calendar Settings.
2. Choose a country from the drop-down menu in order to select another time zone and then click Save.