Which calendar in Maya culture is composed of 365 days?

In Maya culture, the Haab calendar is a solar calendar consisting of 365 days. It is divided into 18 months of 20 days each, plus an additional month of 5 days, often referred to as "nameless days" or "days of the dead." This structure allows the Haab to align closely with the solar year, which is crucial for agricultural practices and ceremonial events in Maya society.

The Calendar Round, on the other hand, is a combination of the 365-day Haab and the 260-day Tzolkin calendars, creating a 52-year cycle that was significant for tracking longer periods of time. The Tzolkin, being a ritual calendar, cycles through a shorter period of 260 days and is primarily used for scheduling religious events. The Long Count calendar is employed for historical recording and is capable of depicting dates over a much longer time span, but it does not specifically refer to a 365-day cycle.

Therefore, the identifying feature of the Haab as the calendar specifically composed of 365 days aligns with the understanding of Maya calendrical systems and their functions in society.