No, You cannot change the time zone on a Facebook ad account once it's been set.
Meta locks the time zone (and currency) when the ad account is created. So if your client accidentally set it to Alaskan time, the entire budget pacing, reporting, and scheduling will run on that time, not Texas (Central Time).
Why it matters:
Yes, it can absolutely affect performance. If Facebook thinks “midday” is 3 hours later than when your actual audience is online, your ads might miss prime engagement windows, especially if you’re using dayparting (scheduling ads only during specific hours).
So what can you do?
Option 1: Create a new ad account with the correct time zone
This is the only real fix. Make sure to:
Create it inside the Business Manager
Double-check that time zone = Central Time (Texas)
Move any active campaigns over
Reconnect your pixel, custom conversions, and audiences
Pro tip: If your client has access to the wrong-time-zone account, they’ll need to create the new one from within Business Manager, not from their personal profile — otherwise, you’ll run into ownership issues.
Option 2: Adjust your ad scheduling manually
If you can’t switch accounts yet:
When setting up ad scheduling (under budget settings), mentally shift your desired hours to match Alaskan time.
Just remember, this adds an extra layer of complexity in managing and analyzing performance.
Where to see the time zone (but not edit it):
Go to Ad Account Settings
Scroll to Business Info section
You’ll see the Time Zone and Currency, but no option to change them