Correct time cannot be set on my Fitbit
I don't know how to change the time on my Fitbit Zip
You have to change your settings on Fitbit's website:
-Log in to your fitbit.com dashboard and click the gear icon in the top right corner.
-Scroll to the bottom of the Personal Info page and modify your timezone.
-After saving your changes, force sync your tracker: Click the Fitbit Connect icon located near the date and time on your computer. Click Sync Now.
Hope that helps!