The wisdom of Maya and Mayan civilization have always been amazing. In astronomy, they have mastered the solar eclipse cycle and the running laws of the sun, the moon and Venus through long-term observation of astronomical phenomena. At the end of the pre-classical period, they created two calendars: the solar calendar and the holy calendar. The former is one year 13 months, 20 days a month and 260 days a year. The latter is one year 18 months, 20 days a month, plus 5 days of death, 365 days a year, every 4 years 1 day. Remember the names of the sun and the moon in two calendars every day, and repeat them every 52 years. What is awe-inspiring is that the earth year they calculated is 365.2420 days, while that of modern people is 365.2422 days, with an error of only 0.0002 days, which means that the error in 5000 is only one day. They calculated that the year of Venus is 584 days, which is only 7 seconds away from the 50 years of modern people. What an incredible number this is. In this way, they still maintain another special religious chronology-a calendar with 13 months and 20 days per month, which is called "Zorkin Year", but modern people can't master this calendar, and even can't find any secrets about it!