Gregorian birthday or lunar birthday?

The solar calendar has 365 days in a year and 366 days in a running year. In order to synchronize with the solar calendar, the lunar calendar sometimes adds one month in a year, which is called leap month. All steps of the government, including calculating the length of service, are calculated according to the solar calendar. Because the new moon is easier to observe than the tropic of cancer, almost all ancient calendars are lunar calendars. The earth revolves around the sun for 365 days, while the lunar December is only about 354 days, so the ancients solved this problem by adding leap months.

Gregorian birthdays are accurate. A solar year is 365 days, and a running year is 366 days. Different from the lunar calendar, in order to synchronize with the solar calendar, sometimes one month is added in a year, which is called leap month. All steps of the government, including calculating the length of service, are calculated according to the solar calendar.

Because the new moon is easier to observe than the tropic of cancer, almost all ancient calendars are lunar calendars. The earth revolves around the sun for 365 days, while the lunar December is only about 354 days, so the ancients solved this problem by adding leap months. Because there are solar terms changes in the calendar, which are closely related to agricultural planting activities, the "Lunar Calendar" plays an important role in the lives of China people, especially farmers.