What time does it start?

You go to a church and there's a sign that tells you what time it starts. But it doesn't tell the truth. Family Life says it starts at 10:30, but really it starts at 10:25. Our church says it starts at nine but really it starts at 9:09. Our church in Austin started at 10, but most people arrived at 10:15.

How can you tell? You just have to go.