The Hallet Calendar at a Glance

Year Published 1997
Days per Week 7
Days per Month Option 1: 30-31
Option 2: 55-56
Option 3: 41-42
Months per Year Option 1: 22
Option 2: 12
Option 3: 16
Base Year Length 668
Leap Days 1
Leap Day Position undefined
Basic Intercalation Formula undefined
Extended Intercalation Formula
(\ denotes integer division)
undefined
Mean Length of Calendar Year undefined
Base Astronomical Year undefined
Accuracy undefined
Cycle of Perpetuity undefined
Mean LS of Beginning of Year undefined
Year Count Start undefined
Epoch (CE) undefined
Epoch (JD) undefined
Month Naming Conventions Option 1:
Anglicized Roman extended
(22 months)
Days Option 2:
Anglicized Roman
(12 months)
Days Option 3:
Anglicized Roman extended
(16 months)
Days
1st Month January 31 January 56 January 42
2nd Month February
30 February
56 February
42
3rd Month March 30 March 55 March 42
4th Month April 31 April 56 April 41
5th Month May 30 May 56 May 42
6th Month June 30 June 55 June 42
7th Month July 31 July 56 July 42
8th Month August 30 August 56 August 41
9th Month September 31 September 55 September 42
10th Month October 30 October 56 October 42
11th Month November 30 November 56 November 42
12th Month December 31 December 55 December 41
13th Month Undecember 30     Undecember 42
14th Month Duodecember 30     Duodecember 42
15th Month Tredecember 31     Tredecember 42
16th Month Quatourdecember 30     Quatourdecember 41
17th Month Quindecember 30        
18th Month Sedecember 31        
19th Month Septemdecember 30        
20th Month Duodevigintis 31        
21st Month Undevigintis 30        
22nd Month Vigintis 30        
7-day Naming Convention undefined
1st Day  
2nd Day  
3rd Day  
4th Day  
5th Day  
6th Day  
7th Day  

Notes:

  1. Option 1 is one of several 22-month calendars.

  2. Option 2 is one of several Symmetric Gregorian Martian calendars, which generally have the following characteristics:

  3. Other types of 12-month calendars are:
  4. Option 3 is one of several16-month calendars.


Document The Fortieth of July
Pierre Hallet
Calendar Option 1
Calendar Option 2
Calendar Option 3
Martian Time

Martian Time

Martian Time Survey

Martian Time Survey 2.2