Is the birthday a solar calendar or a lunar calendar?

Birthdays are generally better and more accurate than the lunar calendar.

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Generally, birthdays are mainly based on the lunar calendar, because the tradition of China people is that birthdays are calculated according to the lunar calendar, and two birthdays can be celebrated according to the lunar calendar and the solar calendar. There is a difference between flat leap years in the solar calendar. If birthdays are calculated according to the solar calendar, people born on February 29 in leap years can only have their birthdays once every four years. Besides, people in China can use the zodiac, so the lunar calendar is the best birthday.

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Because the solar calendar is calculated according to the revolution of the earth, there is a difference between a flat year and a leap year. Although there is a clear stipulation in the solar calendar, if a person born on February 29th of a leap year celebrates his birthday according to the solar calendar, then this person can only celebrate his birthday once every four years, so it is better to celebrate his birthday according to the lunar calendar.

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In addition, many Chinese zodiac signs and zodiac signs in China are mainly based on the lunar calendar. If one year happens to be the year when the lunar calendar meets the solar calendar, then people born here will have two completely different zodiac signs. So in order to avoid this situation, it is best to use the lunar calendar algorithm for birthdays.