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(+01), preceded by the Leap Day(+02) on leap years.

• 02A01 2002-01-01
• 01D07 2001-02-18
• 13B12 2013-01-26
• 02E07 2002-03-04
• 24C01 2024-01-29
• 03+01 2003-12-31

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.

• ANSI C Implementation
• 13 Month Calendar

Last update on 20J12, edited 13 times. +47/83fh

• 18B03 — Arvelie Calendar