If you want it to "zero out," within the forum Control Panel, set the Guest Timezone to "UTC+00:00." This will give you absolute ZERO time adjustments for guest users.
If you want to change the display just for your own account, you can update your own account settings in the Display Preferences page, under "Your Timezone." This will only affect your account, since this is your account's Display Settings.
EDIT: Remember though, all times are stored within the database as UTC+00:00.
Last edited by isaac; 09/16/17 05:21 PM.