How often does it happen that the 29th day of the lunar year is New Year's Eve and there is no New Year's Eve on the 30th?

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 special, with only the 29th and no 30th. So, in the years when the 29th is New Year's Eve, how many years does it take for New Year's Eve to not have the 30th?

The twenty-ninth day of the lunar year is the New Year's Eve.

Years when the twenty-ninth day of the lunar year is New Year's Eve: 1999, 2003, 2012 and 2022;

There are many years when New Year's Eve falls on the 29th day of the twelfth lunar month. It is not uncommon. As long as the twelfth lunar month is a "short month", the 29th day of the twelfth lunar month is New Year's Eve, such as 1999, 2003, and 2012. In 2022, there will be no New Year's Eve, and the 29th day will be New Year's Eve.

This happens because the Chinese lunar calendar uses the "synodic month cycle" to calculate the number of days in a month. The "synodic month cycle" can be long or short, so the lunar year is divided into a long month of 30 days and a short month of 29 days. At the same time, in order to ensure that the first day of each lunar month must be a new moon, the arrangement of long and short months is not fixed, which needs to be determined through observation and scientific calculation. The "Shuo" (first day) of the twelfth lunar month and the "Shuo" (first day) of the first lunar month coincide with a short month, so New Year's Eve is omitted.

How often does it happen that there is no New Year's Eve on the 30th?

There is actually no regulation on New Year's Eve without the 30th. After all, according to previous years, the number of days in the twelfth lunar month in China is uncertain. Some years have 29 days, and some years have 30 days. Therefore, in some years there is no 30th day of the twelfth lunar month, and the 29th day of the twelfth lunar month is New Year's Eve. The years when New Year's Eve falls on the 29th are not fixed, and we cannot infer it based on the rules.

There is New Year’s Eve every year, the only difference is between the 29th and the 30th. This year’s New Year’s Eve is on the 29th. New Year's Eve is the last night of the year. The last day of the year is called "New Year's Eve", which means that the old year ends here and the new year begins. "Chu" means to remove; "xi" refers to night. "New Year's Eve" means New Year's Eve, also known as New Year's Eve, New Year's Eve, New Year's Eve, etc. It is the last night of the year.