kota's memex

A lunisolar calendar which identifies years, months, and days according to astronomical phenomena.

Days begin and end at midnight, and months begin on the day of the new moon. Years start on the second (or third) new moon after the winter solstice.


气歌 (solar term)

"Solar terms" is a twenty-four period lunisolar calendar which stays synchronized with the seasons and has been crucial for agrarian societies.