Yi calendar

The October solar calendar of the Yi people is marked by two cycles of the ecliptic 12, with three cycles of the ecliptic as a cycle (month), that is, the 36th is January and 30 cycles of the ecliptic are one year. 1 year, 10, 360 days, 10 ends, plus 5 days of "New Year's Day", commonly known as "October Year", 365 days for the whole year. Add 1 day every three years, that is, leap year (leap day), that is, 366 days.

According to textual research, the tomb of the Yi people looking to heaven is actually an observatory used by the ancients to observe the stars, which is closely related to the Yi solar calendar. The October solar calendar of Yi nationality is an ancient and mysterious calendar.