The Cronin Calendar at a Glance

Year Published 2001
Days per Week 7
Days per Month 29-31
Months per Year 23
Base Year Length 668
Leap Days 1
Leap Day Position end of year
Basic Intercalation Formula 4x668 + 6x669
Extended Intercalation Formula
(\ denotes integer division)
undefined
Mean Length of Calendar Year 668.6
Base Astronomical Year Winter Solstice
Accuracy 238 years
Cycle of Perpetuity none
Mean LS of Beginning of Year 274.0
Year Count Start 1
Epoch (CE) 0 Jul 28
Epoch (JD) 1721265
23-Month Naming Convention Anglicized Roman + "Alpha/Beta" Days
1st Month Alpha-January 29
2nd Month Beta-January
29
3rd Month Alpha-February 29
4th Month Beta-February 29
5th Month Alpha-March 29
6th Month Beta-March 29
7th Month Alpha-April 29
8th Month Beta-April 29
9th Month Alpha-May 29
10th Month Beta-May 29
11th Month Alpha-June 29
12th Month Beta-June 29
13th Month Alpha-July 29
14th Month Beta-July 29
15th Month Alpha-August 29
16th Month Beta-August 29
17th Month Alpha-September 29
18th Month Beta-September 29
19th Month Alpha-October 29
20th Month Beta-October 29
21st Month Alpha-November 29
22nd Month Beta-November 29
23rd Month Alpha-December 30-31
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:

This is one of several 23-month calendars.


Document Simplest Possible Mars Calendar Used in the Novel As It Is On Mars
Thomas W. Cronin
Calendar Calendar
Martian Time

Martian Time

Martian Time Survey

Martian Time Survey 2.2