lunar calendar
Lunar calendar (English: lunar calendar) also known as lunar calendar, in astronomy with the Gregorian calendar, referring to the moon according to the moon phase to schedule the calendar. It has 12 lunar months, about 354 or 355 days a year. Mainly based on the moon around the earth to run a week for a month (29.5306 days), big month 30, Satsuki 29 days. The pure lunar calendar has the Greek calendar and the Islamic calendar, and most of the usual lunar calendar is actually a yin and yang calendar, such as all the world's Chinese and North Korea, South Korea and Vietnam and the Meiji Restoration before Japan are using the summer calendar. In agricultural meteorology, the lunar calendar is slightly different from the lunar calendar, Yin calendar, ancient calendar, old calendar, refers to the traditional Chinese use of the summer calendar. And in astronomy that the summer calendar is actually a yin and yang calendar. In the ancient agricultural economy, the spring sowing, autumn harvest, the original Gregorian calendar should reflect the agricultural cycle, but many ancient calendar is calculated from the moon, a speculation is the moon in the night is particularly easy to observe, the moon profit and loss at a glance until Astronomical technology is mature, they can observe the role of the sun in the calendar. ...