Adjusting your timezone
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, click the Settings button and choose "Posting Schedule" from the dropdown. Next, click inside the "Schedule Timezone" box and type in the city you'd like to set the timezone to.
To repeat this process for each timezone, click through each account on the left hand side of your Buffer dashboard to set that up.