Nistin Calendar

The Nistin Calendar is the universal calendar of Arasuth, invented by a Shiqan astronomer around the year 6300.

Etymology
The Nistin Calendar is named after Nistxeri, the time-keeper, and refers to the cycle of the larger moon of Arasuth.

Measurement
The calendar is based on the number five. Though hours, minutes, and seconds are equivalent to those on Earth, a day is 25 hours. A week is ten days and a year is 36 weeks, making 360 days in a year. There are six widely recognized seasons: the snow, the thaw, the planting, the heat, the dry, and the rain.

The planet revolves around its sun in 362 days, but the extra days are not accounted for. They are instead moved to the end of time to be dealt with then. This means the seasons slowly shift throughout the years, which makes it impossible for farmers and seasonal workers to use a year as a guideline for the weather. They instead use weeks, and generally agree that it take 6 to 7 weeks for the season to change.

The larger moon of Arasuth has a full cycle of 30 days, meaning that every 15 days is either a new moon or a full moon.

The lesser moon of Arasuth is much smaller and cycles in 25 days. Every 12 days, it is either new or full. Every 60 days, both the larger and lesser moons are either full or new. This happens six times a year, and helps separates the seasons.

Use
The Nistin Calendar is used by every nation in Arasuth, with the exception of the region Pustynya and the region of Kadune, which do not use a calendar at all and remain largely isolated from the rest of the world.

Farmers can and, many times, do use an alternative calendar based on the seasons instead of the revolution of the planet around its sun and the cycles of its moons. This is a far older calendar, first used around the year 3000 in the West.