Which is more accurate, the purple calendar or the old calendar?

Both the old calendar and the Wei Zi calendar are accurate, but these two calendars have different functions. The old almanac is mainly used to query the date, that is, to query the specific date and time. Ziwei calendar is used to choose auspicious days, that is, to choose auspicious days, and the old calendar is used to check dates. Both calendars are accurate, but they have different uses.