Due to different local customs and habits, there are differences in off-year time between the north and the south. The off-year in the north generally refers to the 23rd of the twelfth lunar month, and the off-year in the south generally refers to the 24th of the twelfth lunar month. According to this time, the reasoning is as follows:

1. The northern off-year is 202 1. February 4th is New Year's Eve, that is, the 23rd of the twelfth lunar month.

2. In the south, the off-year time is 202 1. February 5th is New Year's Eve, that is, the 24th of the twelfth lunar month.

3. The off-year time in Taiwan Province Province is the day before New Year's Eve.

The off-year in Nanjing is the 15th day of the first month, which is the Lantern Festival.

Off-year, not just a day, is called "off-year" because of local customs. During the off-year period, the main folk activities include sweeping dust and offering sacrifices to stoves. The traditional off-year (dust-sweeping day) is the 24th day of the twelfth lunar month. In most parts of the south, the ancient tradition of celebrating the New Year on the 24th of the twelfth lunar month is still maintained. Since the middle and late Qing Dynasty, the emperor's family held a ceremony to worship heaven on the 23rd of the twelfth lunar month. In order to "save money", they also worshipped the kitchen god, so people in the northern region followed suit and celebrated the New Year on the 23rd of the twelfth lunar month one day earlier.