Legend: According to legend, in ancient times, there was a young man named Wannian, who saw that the festival at that time was chaotic and had a plan to make it accurate. But I can't find a way to calculate the time.
One day, he was tired of chopping wood on the mountain and sat in the shade to rest. The movement of the shadow inspired him. He designed a sundial to measure the time of the day. Later, inspired by the dripping spring water on the cliff, he began to make a five-layer clepsydra to calculate the time. Over time, he found that every 360 days, the four seasons would cycle once, and the length of the weather would be repeated.
At that time, the monarch was called Zu Ti, who was often troubled by the unpredictable weather. Ten thousand years later, he took the sundial and the clepsydra to see the emperor and explained to Zu Ti the truth about the movement of the sun and the moon. Zu Ti was very happy after hearing this and felt reasonable. So I left for ten thousand years and built the Sun and Moon Pavilion in front of the Temple of Heaven, as well as the sundial platform and the Leaky Pot Pavilion. I hope I can accurately measure the laws of the sun and the moon, calculate the exact time in the morning and evening, and create a calendar to benefit people all over the world.
On one occasion, Zu Ti went to learn about the progress of the perpetual calendar. When he boarded the altar of the sun and the moon, he saw a poem engraved on the stone wall next to the Temple of Heaven: sunrise 360, sunset 360, start all over again. Vegetation is divided into four seasons, and there are twelve circles in a year.
Knowing that the perpetual calendar was created, I personally boarded the Sun Moon Pavilion to visit the perpetual calendar. Wan Nian pointed to the astronomical phenomena and said to Zu Ti, "It's been twelve months now, the old year has passed and the new year has begun again. Please make a festival for you. " Zu Ti said, "Spring is the first year of a year, so let's call it Spring Festival". It is said that this is the origin of the Spring Festival.
After years of long-term observation and careful calculation, he worked out an accurate solar calendar. When he showed his successor the solar calendar, he was covered with silver whiskers. The monarch was deeply moved. In order to commemorate the achievements of 10 thousand years, he named the solar calendar "perpetual calendar" and named it the birthday star of the sun, moon and moon. In the future, people will hang their birthdays on the Chinese New Year to commemorate the venerable ten thousand years.