The Haab’ was a solar calendar the ancient Maya used to describe the agricultural (solar) year and to keep track of accounting and other economic activities.

It consisted of eighteen 20-day months called uinals, which were followed at the end of the year by a waiting period of 5 days called the wayeb. The Maya believed this was the resting period of the gods, a time when people could not count on the support of their deities. Ceremonies were performed to prepare for the return of the gods.