Is there a New Year's Eve every year? Is there a New Year's Eve every year?

New Year’s Eve is one of the traditional festivals of the Chinese Spring Festival. Every family gets together on this festival. However, in some years, New Year’s Eve is very special, with only the 29th and not the 30th. So is New Year’s Eve there every year? Is there a 31st day in Chinese New Year?

Does New Year's Eve happen every year?

New Year's Eve does not happen every year, and it is actually quite normal for a lunar month to not have 30 days;

my country currently uses two calendars. One is the Gregorian calendar commonly used in the West, with a long month of 31 days and a short month of 30 days. The other is the lunar calendar or the agricultural calendar, which was arranged in ancient my country according to the cycle of the moon's waxing and waning, and is called the "synodic month." When the moon is full, it is called "wang" or the fifteenth day. When the moon is not visible, it is called "shuo" or the first day.

However, the average length of a synodic month is about 29.5 days, which is not an integer, and the number of days in a month must be expressed as an integer, so sometimes it is a short month with 29 days; sometimes it is a long month with 30 days. It’s normal not to have “New Year’s Eve”.

And it doesn’t matter whether there is a “30th” in Chinese New Year or not. "People often think of 'New Year's Eve' and 'New Year's Eve' as the same day, but in fact the correct meaning of New Year's Eve is the last day of the lunar year. From the perspective of the astronomical calendar, New Year's Eve can be either the 29th or the 30th day of the twelfth lunar month.

Is there a thirty-first day in the lunar year?

There is no 31st on New Year's Eve, because the lunar calendar has only 30 days at most, so New Year's Eve is usually on the 30th, and the next day is New Year's Day, but sometimes New Year's Eve is on the 29th. In some years, the twelfth lunar month does not have 30 days.

The month in the lunar calendar is based on the new moon and full moon, and a month is the cycle of the waxing and waning of the moon. The average synodic month = 29.530588 days = 29 days, 12 hours, 44 minutes and 2.8 seconds (the length varies between 29.27 and 29.83 days. So January has 29 or 30 days. However, the moon is moving away from the earth at a speed of 38mm per year, and the synodic month only needs to be extended by 0.2 days. According to calculations, it will take about 140 million years for us to have the opportunity to welcome the first twelfth lunar month in history.