The Aitken Calendar (perpetual)

Odd-Numbered Years
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
Spring 1 2 3 4 5 6 7 Summer 1 Autumn 1 2 Winter 1 2 3
1st Qtr. 8 9 10 11 12 13 14 1st Qtr. 2 3 4 5 6 7 8 1st Qtr. 3 4 5 6 7 8 9 1st Qtr. 4 5 6 7 8 9 10
15 16 17 18 19 20 21 9 10 11 12 13 14 15 10 11 12 13 14 15 16 11 12 13 14 15 16 17
22 23 24 25 26 27 28 16 17 18 19 20 21 22 17 18 19 20 21 22 23 18 19 20 21 22 23 24
29 30 31 32 33 34 35 23 24 25 26 27 28 29 24 25 26 27 28 29 30 25 26 27 28 29 30 31
36 37 38 39 40 41 42 30 31 32 33 34 35 36 31 32 33 34 35 36 37 32 33 34 35 36 37 38
37 38 39 40 41 42 38 39 40 41 42 39 40 41 42
Spring 1 2 3 4 5 6 7 Summer 1 Autumn 1 2 Winter 1 2 3
2nd Qtr. 8 9 10 11 12 13 14 2nd Qtr. 2 3 4 5 6 7 8 2nd Qtr. 3 4 5 6 7 8 9 2nd Qtr. 4 5 6 7 8 9 10
15 16 17 18 19 20 21 9 10 11 12 13 14 15 10 11 12 13 14 15 16 11 12 13 14 15 16 17
22 23 24 25 26 27 28 16 17 18 19 20 21 22 17 18 19 20 21 22 23 18 19 20 21 22 23 24
29 30 31 32 33 34 35 23 24 25 26 27 28 29 24 25 26 27 28 29 30 25 26 27 28 29 30 31
36 37 38 39 40 41 42 30 31 32 33 34 35 36 31 32 33 34 35 36 37 32 33 34 35 36 37 38
37 38 39 40 41 42 38 39 40 41 42 39 40 41 42
Spring 1 2 3 4 5 6 7 Summer 1 Autumn 1 2 Winter 1 2 3
3rd Qtr. 8 9 10 11 12 13 14 3rd Qtr. 2 3 4 5 6 7 8 3rd Qtr. 3 4 5 6 7 8 9 3rd Qtr. 4 5 6 7 8 9 10
15 16 17 18 19 20 21 9 10 11 12 13 14 15 10 11 12 13 14 15 16 11 12 13 14 15 16 17
22 23 24 25 26 27 28 16 17 18 19 20 21 22 17 18 19 20 21 22 23 18 19 20 21 22 23 24
29 30 31 32 33 34 35 23 24 25 26 27 28 29 24 25 26 27 28 29 30 25 26 27 28 29 30 31
36 37 38 39 40 41 42 30 31 32 33 34 35 36 31 32 33 34 35 36 37 32 33 34 35 36 37 38
37 38 39 40 41 42 38 39 40 41 42 39 40 41 42
Spring 1 2 3 4 5 6 7 Summer 1 Autumn 1 2 Winter 1 2 3
4th Qtr. 8 9 10 11 12 13 14 4th Qtr. 2 3 4 5 6 7 8 4th Qtr. 3 4 5 6 7 8 9 4th Qtr. 4 5 6 7 8 9 10
15 16 17 18 19 20 21 9 10 11 12 13 14 15 10 11 12 13 14 15 16 11 12 13 14 15 16 17
22 23 24 25 26 27 28 16 17 18 19 20 21 22 17 18 19 20 21 22 23 18 19 20 21 22 23 24
29 30 31 32 33 34 35 23 24 25 26 27 28 29 24 25 26 27 28 29 30 25 26 27 28 29 30 31
36 37 38 39 40 41 30 31 32 33 34 35 36 31 32 33 34 35 36 37 32 33 34 35 36 37 38
37 38 39 40 41 38 39 40 41 39 40 41
Even-Numbered Years
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
Spring 1 2 3 4 Summer 1 2 3 4 5 Autumn 1 2 3 4 5 6 Winter 1 2 3 4 5 6 7
1st Qtr. 5 6 7 8 9 10 11 1st Qtr. 6 7 8 9 10 11 12 1st Qtr. 7 8 9 10 11 12 13 1st Qtr. 8 9 10 11 12 13 14
12 13 14 15 16 17 18 13 14 15 16 17 18 19 14 15 16 17 18 19 20 15 16 17 18 19 20 21
19 20 21 22 23 24 25 20 21 22 23 24 25 26 21 22 23 24 25 26 27 22 23 24 25 26 27 28
26 27 28 29 30 31 32 26 27 29 30 31 32 33 28 29 30 31 32 33 34 29 30 31 32 33 34 35
33 34 35 36 37 38 39 34 35 36 37 38 39 40 35 36 37 38 39 40 41 36 37 38 39 40 41 42
40 41 42 41 42 42
Spring 1 2 3 4 Summer 1 2 3 4 5 Autumn 1 2 3 4 5 6 Winter 1 2 3 4 5 6 7
2nd Qtr. 5 6 7 8 9 10 11 2nd Qtr. 6 7 8 9 10 11 12 2nd Qtr. 7 8 9 10 11 12 13 2nd Qtr. 8 9 10 11 12 13 14
12 13 14 15 16 17 18 13 14 15 16 17 18 19 14 15 16 17 18 19 20 15 16 17 18 19 20 21
19 20 21 22 23 24 25 20 21 22 23 24 25 26 21 22 23 24 25 26 27 22 23 24 25 26 27 28
26 27 28 29 30 31 32 27 28 29 30 31 32 33 28 29 30 31 32 33 34 29 30 31 32 33 34 35
33 34 35 36 37 38 39 34 35 36 37 38 39 40 35 36 37 38 39 40 41 36 37 38 39 40 41 42
40 41 42 41 42 42
Spring 1 2 3 4 Summer 1 2 3 4 5 Autumn 1 2 3 4 5 6 Winter 1 2 3 4 5 6 7
3rd Qtr. 5 6 7 8 9 10 11 3rd Qtr. 6 7 8 9 10 11 12 3rd Qtr. 7 8 9 10 11 12 13 3rd Qtr. 8 9 10 11 12 13 14
12 13 14 15 16 17 18 13 14 15 16 17 18 19 14 15 16 17 18 19 20 15 16 17 18 19 20 21
19 20 21 22 23 24 25 20 21 22 23 24 25 26 21 22 23 24 25 26 27 22 23 24 25 26 27 28
26 27 28 29 30 31 32 27 28 29 30 31 32 33 28 29 30 31 32 33 34 29 30 31 32 33 34 35
33 34 35 36 37 38 39 34 35 36 37 38 39 40 35 36 37 38 39 40 41 36 37 38 39 40 41 42
40 41 42 41 42 42
Spring 1 2 3 4 Summer 1 2 3 4 5 Autumn 1 2 3 4 5 6 Winter 1 2 3 4 5 6 7
4th Qtr. 5 6 7 8 9 10 11 4th Qtr. 6 7 8 9 10 11 12 4th Qtr. 7 8 9 10 11 12 13 4th Qtr. 8 9 10 11 12 13 14
12 13 14 15 16 17 18 13 14 15 16 17 18 19 14 15 16 17 18 19 20 15 16 17 18 19 20 21
19 20x 21 22 23 24 25 20 21 22 23 24 25 26 21 22 23 24 25 26 27 22 23 24 25 26 27 28
26 27 28 29 30 31 32 27 28 29 30 31 32 33 28 29 30 31 32 33 34 29 30 31 32 33 34 35
33 34 35 36 37 38 39 34 35 36 37 38 39 40 35 36 37 38 39 40 41 36 37 38 39 40 41 42
40 41 41 Mid-Year Day
Key to Equinoxes, Solstices, Apsides, and
Leap Sols in the Calendar Tables

1Vernal Equinox
13Aphelion
28Summer Solstice
10Autumnal Equinox
13Perihelion
13Winter Solstice
28Leap Sol

 NOTE: Dates shown for these events will vary due to intercalation.

document Time Measures on Mars
Robert G. Aitken
document Calendar for Mars
Robert S. Richardson
Summary Summary
Martian Time

Martian Time

Martian Time Survey

Martian Time Survey 2.2