When do Thai hotels usually calculate the price for one day?

The check-in time of hotels at home and abroad is almost the same, and they usually check out before 0/2 o'clock the next day, but the check-in time is slightly different. Some hotels require to check in after the first day 12 o'clock to the next day 12 o'clock, and some hotels require to check in at any time from the first day to the second day 12 o'clock.