The Vertregt Calendar at a Glance

Year Published 1963
Days per Week 10
Days per Month N/A
Months per Year none
Base Year Length 660
Leap Days 10
Leap Day Position undefined
Basic Intercalation Formula 1x660 + 6x670
Extended Intercalation Formula
(\ denotes integer division)		 Y/7 + Y/50
Mean Length of Calendar Year 668.6
Base Astronomical Year Mean Tropical
Accuracy 126 years
Cycle of Perpetuity 1 year
Mean LS of Beginning of Year undefined
Year Count Start undefined
Epoch (CE) undefined
Epoch (JD) undefined
 
10-day Naming Convention English planetary
1st Day Sunday
2nd Day Mercday
3rd Day Venusday
4th Day Earthday
5th Day Marsday
6th Day Joviday
7th Day Saturday
8th Day Uraniday
9th Day Neptuday
10th Day Plutoday
Document The Martian Calendar
M. Vertregt
Document Martian Year Revisited
M. Vertregt and Francis Graham
Calendar Calendar
Martian Time

Martian Time

Martian Time Survey

Martian Time Survey 2.2