Who invented the perpetual calendar?

The inventor of the perpetual calendar is uncertain, and there is only one legend about the invention.

According to legend, a long time ago, there was a young man named Wannian who saw that the festival at that time was very chaotic and wanted to make it accurate. One day, he went up the mountain to cut wood and sat in the shade to have a rest. Inspired by the movement of the shadow, he designed a coffin to measure the sun and calculate the time.

But it was raining and foggy at that time, which affected the measurement. Later, the dripping spring on the cliff aroused his interest, and he began to make a five-story clepsydra. As time went on, he found that the length of the weather would repeat every 360 days.

In order to commemorate the achievements of 10 thousand years, the solar calendar was named "perpetual calendar" and named the birthday star of the sun, moon and moon. In the future, people will hang up the Shou Xingtu during the Chinese New Year, which is said to commemorate the venerable ten thousand years.

Extended data

The role of perpetual calendar:

The perpetual calendar can record the dates of specific solar and lunar calendars within a certain time range (for example, 100 years or more), which is convenient for people in need to query and use. The perpetual calendar is just a symbol, indicating a large time span. The perpetual calendar is the oldest solar calendar in ancient legends of China.

The perpetual calendars used now include calendars of several years or calendars suitable for several years. Modern perpetual calendars can display various calendars such as solar calendar, lunar calendar, and dry calendar at the same time, and can also contain various functional information such as good or bad luck, holidays, reminders, etc., which is very convenient for people to query and use.

Baidu encyclopedia-perpetual calendar