Why is Tomb-Sweeping Day April 4th or 5th in the solar calendar?

Tomb-Sweeping Day is basically fixed on April 5th every year, and Tomb-Sweeping Day is one of the traditional solar terms. The calculation is based on the annual vernal equinox. The vernal equinox will have a solar term every 15 days, so Qingming is generally between April 4 and April 6 in the solar calendar, with more time on April 5. It is not fixed on April 5 of the solar calendar, nor is it determined by the lunar calendar. 20 18 Tomb-Sweeping Day is April 5th.

On May 20th, 2006, with the approval of the State Council, Tomb-Sweeping Day announced by the Ministry of Culture of China was included in the first batch of national intangible cultural heritage list.

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In addition to paying attention to hiking and sweeping graves, Tomb-Sweeping Day also has a series of customs and sports activities, such as banning fire, swinging, cuju, playing polo and inserting willows. In the history of China, it has long been a custom to eat cold food and forbid fire and pay homage to ancestors. After the Tang Dynasty, the Cold Food Festival gradually declined, and Tomb-Sweeping Day's grave-sweeping and ancestor worship became a continuous festival tradition. Even in today's society, before and after Tomb-Sweeping Day, people still have the custom of going to graves to pay homage to their ancestors: uprooting weeds, placing offerings, burning incense and praying in front of graves, burning paper money and gold ingots, or simply offering a bunch of flowers to express their memory of their ancestors.

When I was in Tomb-Sweeping Day, it was the time for spring to return to the earth. People use this advantage to enjoy the scenery of Shan Ye while sweeping graves. Going for an outing is also called a spring outing. In ancient times, it was called spring exploration. It means stepping on the grass, playing in the country and watching the spring.

References:

Baidu Encyclopedia-Tomb-Sweeping Day