What does the first month mean?

The first month is the first month of the lunar calendar in China.

The first month is the month of "building rights". In the era of observing the image, bucket handle returned to the Yin, and the month was the first month. The establishment of the calendar was originally the concept of establishing the calendar in December. It has also been used to refer to the first month of other calendars. Now usually refers to the first month of the lunar calendar.

In the summer calendar, January in spring is the first month, which is equivalent to the lunar month in the dry calendar; In the Shang calendar, December is the first month, which is equivalent to the ugly month in the Ganzhi calendar; The first month of the weekly calendar is winter and November, which is equivalent to the month of Jianzi in the dry calendar; The first month of the Qin calendar is October in winter, which is equivalent to the moon in the dry calendar. This is the origin of Li Xia Yin Jian, Li Shang Jianchou, Li Zhoujianzi and Li Qin Jianhai. In fact, they belong to different calendars and correspond to each other.