How to calculate a birthday?

Well, if you always celebrate your birthday in the lunar calendar, that is, the third day of the first month, then you can also celebrate your birthday in the lunar calendar, that is, the third day of the first month every year. If you celebrate the solar calendar, that is, 65438+1October 29th, you can celebrate it every year. Different habits. If the lunar calendar is always celebrated, it doesn't mean that the solar calendar is 65438+1October 29 every year.