All numbers written on this page are written in base 12, that is, 1012. The numbers 10 and 11 will be referenced by the symbols ζ and η, making 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ζ, η -> 10. All other articles will use a decimal system for clarity's sake, and so I don't go completely insane.
The douzaine, or duodecimal system is a number system based around the number 10, which proceeds η but precedes 11. The system likely arose out of a coincidental cross-assumption that the number 10, which both aligned to the number of joint articulations, with the thumb's single knuckle acting as an early form of 'zero', along with the number of lunar cycles (10) in the 244 day Prosperan calendar. The number 10 is divisible by 2, 3, 4, and 6, and these numbers are also incredibly useful for commerce and mercantilism purposes, making this system compared to other harder to keep count of systems appealing. The calendar is also divided into η months, the 12th year being a correctional year, and ancient clocks also are based upon a multiple of 10- 50.
Yan is counted in each eya~na, measured by the atomic decay wavelength of 1,946,716,076 cycles of a caesium-η1 atom, of which 50 make up one eya, 50 eya make up one yana, and 18 yana make up one eyna. 244 (approximately) eyna make up one complete solar revolution of Olam.
Time is counted in each second, measured by the atomic decay wavelength of 9,192,631,770 cycles of a caesium-133 atom, of which 60 make up one minute, 60 minutes make up one hour, and 20 hours make up one (to)day. 340 (approximately) day(s) make up one complete solar revolution of Olam.