Who had a calendar including five days of celebration?

The ancient Maya civilization had a calendar that included five days of celebration, known as the "Wayeb'" or "Wayoob" days. These days occurred at the end of the year in their 365-day calendar, the Haab'. During this period, the Maya believed that the boundaries between the physical and spiritual worlds were blurred, leading to various rituals and ceremonies to honor their deities and ensure a prosperous new year.