How to adjust the timezone from the iOS app
As opposed to having an account wide timezone, you're able to configure the timezone for each of your connected social accounts. To adjust the timezone for one of your accounts from the iOS app, please follow the steps below.
Begin by opening the Buffer app on your mobile device and tapping round avatar icon at the top left of your screen.
Select the social account you wish to adjust the timezone for.
Tap the Schedule button at the bottom of your screen.
From there, tap the current timezone and adjust it by typing in the city you'd like to set it to.