Why is the first day of the first month the Spring Festival?

The first day of the first month is the first day of the new year, so it is the Spring Festival.

The first day of the first lunar month is the beginning of the year, month and day of the lunar calendar, which is the first day of the first lunar month; Because it is the first Shuori, it is also called "Yuanshuo". This day heralds the beginning of a new year, so it is called the New Year, that is, the Spring Festival. In the traditional sense, the Spring Festival refers to the most solemn day of the Spring Festival, from the twelfth lunar month in La Worship, or the 23rd (northern off-year) or 24th (southern off-year) to the 19th day of the first month.

Spring Festival, the China Lunar New Year, is commonly known as Spring Festival, New Year and New Year's Eve. It is also called "New Year" and "New Year's Eve". It is a folk festival integrating the old with the new, offering sacrifices to gods and ancestors, praying for evil spirits, reuniting relatives and friends, celebrating entertainment and drinking.

From the Qin Dynasty to the mid-Western Han Dynasty, the beginning of a year is always in October of the summer calendar, that is, the first day of October of the lunar calendar is the New Year. In the first year of Emperor Wu of the Han Dynasty, namely 104 BC, the first month of the year was set in "Yin Jian" month, that is, the first month of the lunar calendar, which was followed by generations thereafter.