How to celebrate the birthday of leap month?

Because the birthday of leap month is rather sad, so in order to let people born in leap month celebrate their birthdays, the ancients let people born in leap month celebrate their birthdays in the same month of the year without leap month, that is, just on the normal birth date. For example, people born on the first day of leap July can celebrate their birthdays on the first day of July in years without leap months.

In addition, early birthday is also a common method for many people. Although it is not their real date of birth, it is also an affirmation that they came to this world, so it is also a good choice to celebrate their birthdays in years without leap months.

For modern people, they prefer to celebrate their birthdays in the solar calendar. Many people don't remember their birthdays in the lunar calendar, so it's not a big problem that many young people are sad to celebrate their birthdays in leap months now. It will take decades to celebrate your birthday, and it is almost gone. It's just that many elders are still used to celebrating their birthdays in the lunar calendar, so it's very suitable for parents to celebrate their birthdays in leap months according to the above methods.

The reason of leap month

The lunar calendar is based on the rise and fall of the moon. The process from this new moon to the next (or, from this time to the next) is that the moon revolves around the earth once. This period is called the first month, and this period is also a month in the lunar calendar.

The period of the first lunar month is 29.5366 days, which is 29 days 12 hours, 44 minutes and 3 seconds. So the lunar calendar also produced a big moon and a small moon. The big moon has 30 days and the small moon has 29 days. Because the first day of each month in the lunar calendar must be a new moon, its big moon and small moon can only be determined by strict calculation. Sometimes there may be two big months or two small months in a row. The first month of the lunar calendar is longer than 29 and a half days, so every 100 calendar month of the lunar calendar, there are about 53 big months and 47 small months.

The lunar year is basically 12 months, but the total time of 12 lunar months is 354.3667 days, and the total time of the tropical year (the earth revolves around the sun) is 365.2422 days, with a difference of about 1 1 day. This adds up to 33 days every three years. In order to eliminate the extra days, one month is added every three years, which is the leap month of the lunar calendar. Therefore, in the leap year of the lunar calendar, there is a strange phenomenon of one year 13 months.