How many months in Olmec calendar?

The Olmec calendar, which is believed to have been one of the earliest Mesoamerican calendars, consists of 18 months. Each month typically has 20 days, leading to a total of 360 days in a year. Additionally, there are 5 extra days, known as "nameless days," which are added to complete the solar year. This system reflects the Olmec's sophisticated understanding of time and celestial cycles.