Hwätnhäyär calendar

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The Hwätnhäyär calendar (commonly abbreviated "HH calendar", Yaharan: Hwätnhäyär ønänntulÿg) is a lunar calendar used by the Vadyashon priesthood and official documentation of the governments of Yaxarhayut and Upper Yahara. It consists of a repeating cycle of an initial leap cycle, twenty-three medial cycles, and a final cycle. Combined, these add up to approximately a millennia. The calendar is further divided into lunar years of twelve lunar, synoptic months a year, which are divided into thirty days each, excepting the twelfth month of the year, which only has twenty-four days, as well as a possible "leap month".

Alignment with Gregorian Calendar

The Hwätnhäyär calendar begins on 7 July 1935BC. The New Year moves back throughout the year due to the Hwätnhäyär calendar functioning under a 354 day, not 365 day, year. Leap days exasperate this change throughout the Hwätnhäyär leap cycles and the Gregorian leap cycle of four years. The next few New Year's dates are marked below.

Gregorian: Hwätnhäyär:
16 October 2015 3950
5 October 2016 3951
24 September 2017 3952
13 September 2018 3953
3 September 2019 3954
24 August 2020 3955

Leap Cycles

There are four types of leap cycles present in the calendar, each are repeated and grouped into larger cycles, the aforementioned initial, medial, and final cycles.

Small Leap Cycles
Numerical Designation Number of years
1 2
3
3
2 2
3
3
3
3 3
3
3
4 2
Large Leap Cycles
Designation Small Cycles
Initial 3
1
1
1
1. → 5. Medial 2
1
1
1
1
6. Medial 2
1
1
1
7. → 11. Medial 2
1
1
1
1
12. Medial 2
1
1
1
13. → 17. Medial 2
1
1
1
1
18. Medial 2
1
1
1
19. → 23. Medial 2
1
1
1
1
Final 4

Festivals and Holidays