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Is there anything special about leap month?
Leaping month is a way of calendar leap. The position of the lunar leap month is completely artificial from ancient times to the present, and the position of the leap month is different in different calendars of past dynasties. When ancient astronomers compiled the lunar calendar, in order to make any day in a month contain the meaning of the moon phase, that is, the first day is a moonless night and the fifteenth day is a full moon, so the first day is mainly the first month. At the same time, considering the seasons and seasons, they adopted the method of seven leaps in nineteen years: there are twelve ordinary years in the nineteenth year of the lunar calendar, and one ordinary year has twelve months; There are seven leap years and each leap year has thirteen months.
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