Why is Tomb-Sweeping Day's gas scheduled for April 5th and Tomb-Sweeping Day's gas scheduled for April 5th?

1, the extension of solar terms sometimes makes the time of a solar term exceed midnight to the next day, or the solar term changes due to the advance of a solar term in a leap year. Of course, no matter how it changes, the date difference of solar terms will only be within 3 days. The date in Tomb-Sweeping Day will only change on April 4th, 5th and 6th.

Qingming is both a festival and a solar term. In ancient times, there were Cold Food Festival and Shangsi Festival, which were close to Tomb-Sweeping Day. Both festivals are in the early March of the lunar calendar. Later, people merged these two festivals, so there was Tomb-Sweeping Day.