The Gangale Asymmetric Gregorian Calendar at a Glance

Year Published 1990
Days per Week 7
Days per Month 47-66
Months per Year 12
Base Year Length 668
Leap Days 1
Leap Day Position end of 2nd month (of 12)
Basic Intercalation Formula 4x668 + 6x669
Extended Intercalation Formula
(\ denotes integer division)
(Y-1)\2 + Y\10 - Y\100 + Y\200
Mean Length of Calendar Year 668.5950
Base Astronomical Year Winter Solstice
Accuracy 1250 years
Cycle of Perpetuity none
Mean LS of Beginning of Year 280.4
Year Count Start 0
Epoch (CE) 1975 Aug
Epoch (JD) 2442639
12-Month Naming Convention Anglicized Roman Days
1st Month January 51
2nd Month February
50-51
3rd Month March 60
4th Month April 62
5th Month May 66
6th Month June 63
7th Month July 62
8th Month August 57
9th Month September 51
10th Month October 50
11th Month November 47
12th Month December 49
7-day Naming Convention English
1st Day Sunday
2nd Day Monday
3rd Day Tuesday
4th Day Wednesday
5th Day Thursday
6th Day Friday
7th Day Saturday

Notes:

  1. This is one of several Asymmetric Gregorian Martian calendars, which generally have the following characteristics:

  2. Other types of 12-month calendars are:

Document The On-line Darian Calendar
Thomas Gangale
Calendar Calendar
Martian Time

Martian Time

Martian Time Survey

Martian Time Survey 2.2