This document is part of the Martian Time Boneyard. It was originally located at http://www.xs4all.nl/%7Efwb/kalenders.html.
Author: Frans Blok

Possible Mars-calendars

as discussed in the Time-sig

color codings of the months indicate Winsum, Vertum, Sumwin and Tumver, in other words Northern Winter, Spring, Summer and Autumn 
numbers in italics indicate intercalary days, holisols, Holy Weeks or "weks"

note that the prime divisibility factor determines the number of rows

12 month calendars
Zubrin author: Zubrin
number of weekdays
:  7
divisibility
: none
non-perpetual
61 65 66 65 60 54
50 47 46 48 51 56


16 month calendars
Vophick author: Knoke
number of weekdays
:  9
divisibility
: 2, 3, 4, 8
non-perpetual
42 42 41 42 42 42 42 41
42 42 42 42 41 42 42 41

Vophick perpetual author: Knoke
number of weekdays
:  7
divisibility
: 2, 3, 4, 8
monthly perpetual
42 42 41 42 42 42 42 41
42 42 42 42 41 42 42 41

19 month calendars
Rohrer author: Rohrer
number of weekdays
:  7
divisibility
: none
monthly perpetual
35 35 35 35 35 1 35 35 35 35 35 1 35 35 35 35 1 35 35 35 35 35 1


20 month calendars

Wriglean author: Smirnov
number of weekdays
:  11
divisibility
: 2, 4, 5, 10
perpetual
33 33 33 33 33 33 33 33 33 33
33 33 33 33 33 33 33 33 33 33 8

Pavonian author: Knoke
number of weekdays
:  8
divisibility
: 2, 4, 5, 10
monthly perpetual
33 34 33 34 33 34 33 34 33 33
33 34 33 34 33 34 33 34 33 34

Millennium author: Graham
number of weekdays
:  7
divisibility
: 2, 4, 5, 10
perpetual
33 33 33 34 34 33 33 33 34 34
33 33 33 34 34 33 33 33 34 34


21 month calendars
Kretsch author: Kretsch
number of weekdays
:  8
divisibility
: 3, 7
monthly perpetual
32 32 32 32 32 32 31
32 32 32 32 32 32 31
32 32 32 32 32 32 31


22 month calendars
Pulse author: Kokh
number of weekdays
:  7
divisibility
: 2, 11
non-perpetual
29 29 30 30 30 31 31 31 31 31 31
31 31 31 31 31 31 30 30 30 29 29

Bumpy non-bumpy author: Knoke/Slosberg/Kokh/Blok
number of weekdays
: 5, 6 or 10
divisibility
: 2, 11
monthly perpetual
30 30 30 30 30 30 30 30 30 30 30 7
30 30 30 30 30 30 30 30 30 30 30 1

Bumpy Perpetual 6 day week author: Knoke
number of weekdays
: 6
divisibility
: 2, 11
monthly perpetual
24 2 30 30 30 30 30 30 30 30 30 36
36 30 30 30 30 30 30 30 30 30 30

Bumpy Perpetual 9-day week author: Knoke/Blok/Slosberg
number of weekdays
: 9
divisibility
: 2, 11
monthly perpetual
36 27 36 27 36 27 36 27 36 27 36
27 36 36 36 36 36 36 36 36 36 36

Thothian Wheel author: Hightower
number of weekdays
: 10
divisibility
: 2, 11
monthly perpetual
30 30 30 30 1 30 30 1 30 30 1 30 30 1 30
30 1 30 30 1 30 30 1 30 30 1 30 30 30 30


24 month calendars
Darian author: Gangale
number of weekdays
: 7
divisibility
: 2, 3, 4, 6, 8, 12
monthly perpetual
28 28 28 28 28 28 27 28 28 28 28 27
28 28 28 28 28 28 27 28 28 28 28 27

Suran author: Suran
number of weekdays
: 7
divisibility
: 2, 3, 4, 6, 8, 12
monthly perpetual
28 28 28 28 28 28 28 28 28 28 28 28
28 28 28 28 28 28 28 28 28 28 28 28/21

Latest update: 23 November 1999