The fifteenth day of the first month in 2023 is the first day of the first month in Guimao and the sixth week of February 5 in the solar calendar.

The fifteenth day of the first month in 2024 is the fifth day of the third lunar month of Chen Jianian and the eighth week of February 24th of the solar calendar.

The fifteenth day of the first month in 2025 is Renzi Day in the second year of Wuyin, and the seventh week is the solar calendar1February Wednesday.

The fifteenth day of the first lunar month is the Lantern Festival, also known as Shangyuan Festival and Yuanxiao. It is the first full moon night of the New Year, so it is called "Lantern Festival". This festival has the custom of watching lanterns in past dynasties, so it is also called Lantern Festival. There are folk activities such as going out to enjoy the moon, burning lamps and setting fires, enjoying riddles and eating Yuanxiao, as well as social fire performances such as dragon dancing and walking on stilts.