Korea traditional almanac
Variations of the lunar calendar, based on the phases of the moon were used in Mesopotamia, Greece, Rome, India, and China for centuries.
Almost every aspect of traditional Korean life was also based on the lunar calendar. Koreans divided each year into twelve months, beginning with the winter solstice. Twenty-four solar subdivisions (cholgi) corresponded to the days on which the sun entered the first and fifteenth degrees of the twelve zodiacal signs.