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No more Chinese New Year's Eve

author:Drowsy van

Today, the 2022 Spring Festival has begun, and the footsteps of the Year of the Tiger are getting closer and closer. A careful look at the calendar can be found that this year's Chinese New Year's Eve is the twenty-ninth day of the Waxing Moon, and there is no "Chinese New Year's Eve". In fact, this phenomenon is not uncommon, and there has been no Chinese New Year's Eve for 5 consecutive years from 2025 to 2029. Why? Where did Chinese New Year's Eve go?

No more Chinese New Year's Eve

This is related to the lunar calendar algorithm unique to the mainland. Originally, a month in the Gregorian calendar has 30 days, some have 31 days, and February has only 28-29 days. The lunar calendar also has a large and small month, with 30 days in the big month and 29 days in the small month. This is because the lunar calendar is calculated according to the change of the moon's circle and is called "synodic moon" in astronomy.

According to the "Compilation and Promulgation of the Lunar Calendar" drafted by the Purple Mountain Observatory of the Chinese Academy of Sciences, "Shuo Day is the first lunar day of the lunar month", that is, the first day of each lunar month is the Shuo Day. From "Shuo" to "Wang" to the next "Shuo", a cycle is about 29.53 days, so the calculated number of lunar month days is either 29 days of the small month or 30 days of the big month. This year's Waxing Moon coincides with a small month, only 29 days, so there is no Chinese New Year's Eve.

In fact, there are not many times when the waxing moon meets the small moon, and the probability of Chinese New Year's Eve not being seen is not too low.

It is reported that after entering 2000, there were no Chinese New Year's Eve in 2000, 2001, 2003, 2006, 2012, 2013 and 2016. Days without Chinese New Year's Eve are not uncommon, and sometimes they appear in succession. From 2025 until 2029, there will be no Chinese New Year's Eve for five consecutive years.

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