Venus cycle in Mayan calendar

Another calendar that was important to the Mayans was the Venus cycle. The Mayans made great achievements in astronomy. They could calculate the period of Venus very accurately. The Dresden manuscript, one of the Mayan engravings, accurately calculated the position of Venus from page 46 to page 50, and the Maya could achieve such accuracy through years of careful observation. The calendar of Venus cycle is particularly important to the Mayans, because the Mayans believed that Venus cycle was related to war and used it to predict the auspicious days of war and coronation ceremony. When Venus rises, Mayan rulers will plan to wage war. The Mayans may also follow the movements of other planets, such as Mars, Mercury and Jupiter.