Which is more accurate, the perpetual calendar or the yellow calendar?

Both the perpetual calendar and the yellow calendar are accurate, but the functions of these two calendars are different. The perpetual calendar is mainly used to query the date, that is, to query the specific year, month, day and time. The yellow calendar is used to select an auspicious day, that is, to select an auspicious day, and the perpetual calendar is used to check the date. Both calendars are accurate, but they have different uses.