What city does it say it’s set to when you have the time set to automatic? Is that city in your time zone?
If not, the iPad probably thinks you are in a different time zone.
Go to Settings > Privacy. Scroll all the way to the bottom till you see the System Services. Open it and make sure you have Setting Time Zone turned on.
If your iPad is wi-fi only, the location service provided may not be as accurate. It will depends on what wi-fi networks the iPad can see, and whether Apple’s database is correct. As a last resort, the iPad may end up using the IP address of your internet provider, which may be located outside your timezone. VPNs can also affect your location.
The only recourse if your wi-fi only iPad can’t find it’s location based on Apple’s database is to turn off automatic and set your time zone manually. A cellular iPad should find it’s location as long as it isn’t deep in a building or other location where a GPS signal can’t reach. It will do this even if you don’t have a cellular plan, so long as location services are turned on.