Central Dzózó calendar

The Zhandebasana Azatsuma or Zhandebasa calendar is the primary means of timekeeping used by the Zhandebasa. It measures both the solar year and the synodial period of the small moon of Winter. Because the small lunar year and the solar year are almost identical the calendar cannot be clearly classified as a lunar, solar or lunisolar calendar.

Etymology
The term Zhandebasana Azatsuma can be translated as "calendar of the Zhandebasa" consisting of the endonym Zhandebasa (zhan "two" + de "from" + basa "people") and the word Azatsuma (aza "time" + satsuma "measurement"). The word is reduced from its expected form of **Azasatsuma through haplology.

Months
There are 24 regular months and one transitional month based on the phases of the smaller of the two winter moons. The beginning of each month is defined by the appearance of a new moon. The transitional month is split into two halfs by new years day.