According to the date on the ID card, it is a constellation. ...

Constellations are calculated according to the Gregorian calendar (Gregorian calendar), and the date on the ID card is not necessarily Gregorian calendar. Many people's ID cards are dated according to the lunar calendar, which is related to the requirements of registered permanent residence. For example, in big cities now, parents are required to show their babies' birth certificates, which are all issued by hospitals, and big hospitals use the Gregorian calendar; But if it is in the countryside or something, it is based on local habits and the habits of the elders.

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