1October 3 10 What day is it?

Lunar calendar is one of the traditional calendars in China and the original calendar of ancient countries. Calendars based on the apparent movement of the moon are called lunar calendars, also known as lunar calendars, lunar calendars, ancient calendars, yellow calendars, summer calendars and old calendars. The real lunar calendar is the Islamic calendar. That is, twelve lunar months are a year, regardless of seasonal changes. The lunar calendar is mainly used to guide their religious festivals.

The solar calendar, also known as the solar calendar, is calculated according to the movement period of the earth around the sun. The solar calendar is based on the running cycle of the direct point of the sun, and its average calendar year is the tropic year. There are two kinds of calendar years, one is the normal year, the other is the leap year, and the leap year is only one day away from the normal year.

The popular Gregorian calendar

The Gregorian calendar, which is widely used in the world, is the most familiar solar calendar. This calendar is saturated with the civilization created by human beings for thousands of years. It was learned by the ancient Romans from the Egyptians and spread all over the world with the expansion of the Roman Empire and the rise of Christianity. In astronomy, the lunar calendar refers to a calendar that takes into account the relationship between the sun, the moon and the earth. In the lunar calendar, the moon orbits the earth 1 month, but the leap month is set to make the average number of days in a year consistent with the number of days in the tropic of cancer.

Therefore, this calendar is consistent with the periodic movements of the moon and the earth around the sun. The calendar in China began about 4000 years ago. According to a page of Oracle bone calendar in Oracle Bone Inscriptions, it is proved that the calendar of Yin Dynasty has reached a considerable level. This page of Oracle Bone Inscriptions is the oldest almanac of all mankind, and this page of Oracle Bone Inscriptions is also called the calendar.