The process of changing your time zone setting manually in Gmail is a little awkward. If you’re using Chrome or an official Gmail app then Gmail will use the clock on your device – phone, tablet or PC – to set its own clock. In other words, you can’t manually change it within the Gmail service itself. Instead, you’ll need to adjust the clock on your device instead.
In Windows, to change your timezone, simply right-click on the clock in the taskbar and select “Adjust date/time” near the top of the list.
Once in the Windows settings app, select your time zone from the “Time zone” drop-down box.
Once this setting is applied to your operating system refresh Gmail and the time-stamps of your emails will respect your new time zone settings. Refresh it again if it doesn’t work – it may take a minute or two to pick up on the new setting.
If you want to change your time zone in your mobile device, you can do so through the Time&Date settings option in your device – the exact steps will depend on the make and model of the device.
An alternative option:
Although we could not get this to work for us, other users have reported success in changing their Gmail timezone through their Google Calendar.
The instructions to do this are as follows:
First, open your Google Calendar and click on the gear symbol at the top right. Select Settings from the drop-down and find the ‘Time Zone’ option.
Select the one you want to use as your primary and click on it – it saves automatically, then return to Gmail and refresh it. For us, the time zone setting of the computer overrode that of Google Calendar, but some users have reported success with this method!