Arvelie is an alphabetic date format.
The Arvelie calendar has 26 months of 14 days each.
Each month has 2 weeks of 7 days, and each month's name is one of the 26 letters of the alphabet. The 365th day of the year is the Year Day(+00), preceded by the Leap Day(+01) on leap years.
The purpose of this special calendar is to record daily activity logs starting at year 0 when the tracking started. For example, this wiki was initiated in 2006, which is its year 0. The arvelie date 13A05, is equivalent to January 6th of the 14th year.
- 01D07 2007-02-18
- 02A00 2008-01-01
- 14C01 2009-01-29
- 03+00 2010-12-31
To calculate the day of the year, convert the month's letter to a value, starting with 0 for A, multiply by 14 and add the day of the month. For example, J05 is equal to
(+ 5 (* 9 14)), or 131.
Arvelie time can be implemented in a few lines of Uxntal like:
@print-arvelie ( -- ) .DateTime/year DEI2 #07d6 SUB2 NIP ( digit1 ) DUP #0a DIV ,&print JSR ( digit2 ) #0a [ DIVk MUL SUB ] ,&print JSR .DateTime/doty DEI2 ( month ) DUP2 #000e DIV2 NIP #11 ADD ,&print JSR ( digit3 ) #000e [ DIV2k MUL2 SUB2 ] DUP2 #000a DIV2 NIP ,&print JSR ( digit4 ) #000a [ DIV2k MUL2 SUB2 ] NIP &print #30 ADD #18 DEO JMP2r
12B02— Arvelie Calendar