The month and date of the solar calendar are very consistent with the position of the sun on the ecliptic. According to the date of the solar calendar, we can clearly see the changes of cold and warm seasons in a year. But every month, you can't see the new moon, the new moon, the new moon.
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The solar calendar is a Venus calendar based on astronomical calculation, so it is very important for Maya's farming routine. There are 18 months in a year, 20 days in each month, and 5 death days, so a year is 365 days. After long-term observation and careful calculation, the Maya, who are good at astrological observation, revised the length of a year to 365.4438+029 days, which is less than one tenth of the absolute length of 365.438+098 days measured scientifically today.
When God was reincarnated 73 times over the years, he just returned to the same mark as 52 revolutions in the solar year, thus forming a 52-year cycle called the calendar circle. There is no evidence that the Mayans defined these 52 years as a century, but it is very important for the Mayans to end the cycle of every 52 years. They will worship the gods and pray for the next 52 years.
Baidu encyclopedia-solar calendar