Calendar System

Old West
Before the inception of the new and improved International Amity Calendar, the West used a variation of calendars according to local culture and tradition. But all the smart and civilised city states marked their years with the regular passing off the Maha Comet, which was visible in the night sky every 532 years. As such, an average year in the old calendar would look like 11-343; the 343rd year of the 11th circuit.

I suppose that Hylla wouldn't exist for a millenium but rather by some other constant (Planck's constant and so on). The Hyllum approximately 854.322 years and this number has been found elsewhere in areas of orkography, psychosophy and the other occult arts (divinity?). Assuming Boays got his powers around 9BBK. Hyllic constant. Set around 1695 BK - roughly 200 years behind.

After hostilities had settled down between the East and West, it was soon found out that the wildly varying calendar systems made trade very difficult. So, the authorities came together and created a new system, a mix of names and the best features from each. 13 month, 7 day week, 4 week month, 24 hour month. International Amity Calendar. Also the scientific community got together and used the opportunity to push for a standardised measuring system based on tens. Amity System.

The Old Eastern standard had 26 days because 26 is special

For the Eastern Calendar, the Battle of Kings (BK) is the epoch date. Its usage is prominent in Dallanaist countries but tribalists choose to refer to it as Common Era (CE).

Eastern Calendar
Solar, 7 day week, 10 months of 36 days and a couple of extra days thrown in per month???

Western Calendar
Lunar, 4 weeks of 8 days per month, 11 months, 13 intercalary days