Which is more accurate, Gregorian calendar or lunar calendar?

Lunar calendar is more accurate! Gregorian calendar is a kind of solar calendar. In terms of accuracy, it is not comparable to the Islamic solar calendar (the average difference between each year and the tropic year is only 3.7 seconds), nor to the lunar calendar (after the lunar calendar cancels the leap week, the average time of "year" has no error with the tropic year).

The lunar calendar is a kind of lunar calendar-the number of days in a year is determined according to the cycle of the earth orbiting the sun, and the number of days in a month is determined according to the cycle of the moon orbiting the earth. Compared with the Gregorian calendar, the lunar calendar has many advantages, such as: it can guide farming (refer to the 24 solar terms); Can judge the moon phase; Judging the solar eclipse (if there is a solar eclipse, it must be on the first day of the lunar calendar; If there is an eclipse, it must be around the fifteenth day of the lunar calendar); The size of the tide can be predicted (the size of the tide has obvious corresponding laws with the lunar calendar date).

Since the Gregorian calendar is not accurate, why did it become the Gregorian calendar? The reason is that this is a Christian calendar. The invasion and expansion of western colonial countries brought this calendar to all parts of the world (even forced to all parts of the world) and made it available in most parts of the world. China uses the Gregorian calendar in order to "connect with the world". But since ancient times, China has always used the lunar calendar (summer calendar). The lunar calendar is one of the excellent traditional cultures in China, which must be passed down!