Answer the question based on the dialogue below.

Hans: Hello, Mega. Do you know the time we practice playing tak kadal lobang game in the school field today?

Mega: Yes, I do. We play it after school time is over at a half past three.

Hans: Oh, I see. How long do we play it?

Mega: We need an hour to play.

Hans: I think that's too long. How about playing only for thirty minutes?

Mega: Yeah, that's cool. We can finish the game at four o'clock in the afternoon.

Hans: Okay. See you later.

Mega: See you.

When do they finish tak kadal lobang game?