Perpetual Calendar1
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Perpetual Calendar
The perpetual calendar makes it possible to find the correct day of the week for any date over a wide range of years. To find the day of the week for any Gregorian or Julian date in the perpetual calendar provided in this table, first find the proper dominical letter (one of the letters A through G) for the year in the upper table. Leap years have two dominical letters, the first applicable to dates in January and February, the second to dates in the remaining months. Then find the same dominical letter in the lower table, in whichever column it appears opposite the month in question. The days then fall as given in the lowest section of the column. [*On and before 1582, October 4 only. **On and after 1582, October 5 only]
Year
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 Month
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
0 700 1400 DC B A G FE D C B AG F E D CB A G F ED C B A GF E D C BA G F E DC
January, October February, March, November April, July May June August September, December 1 8 15 22 29 2 9 16 23 30 3 10 17 24 31 4 11 18 25 5 12 19 26 6 13 20 27 7 14 21 28
100 800 1500* ED C B A GF E D C BA G F E DC B A G FE D C B AG F E D CB A G F ED A D G B E C F Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Julian Calendar 200 300 400 900 1000 1100 FE D C B AG F E D CB A G F ED C B A GF E D C BA G F E DC B A G FE
GF E D C BA G F E DC B A G FE D C B AG F E D CB A G F ED C B A GF
B E A C F D G Saturday Sunday Monday Tuesday Wednesday Thursday Friday
AG F E D CB A G F ED C B A GF E D C BA G F E DC B A G FE D C B AG
Century
500 1200
600 1300
1500**
BA CB … G A F F G E E F D DC ED CB B C A A B G G A F FE GF ED D E C C D B B C A AG BA GF F G E E F D D E C CB DC … A B … G A … F G … ED FE … C D … B C … A B … GF AG … E F … D E C C D B BA CB AG Dominican Letter
C F B D G E A Friday Saturday Sunday Monday Tuesday Wednesday Thursday
D G C E A F B Thursday Friday Saturday Sunday Monday Tuesday Wednesday
1600 2000 2400 BA G F E DC B A G FE D C B AG F E D CB A G F ED C B A GF E D C BA
E A D F B G C Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Gregorian 1700 2100 2500 C B A G FE D C B AG F E D CB A G F ED C B A GF E D C BA G F E DC
Calendar 1800 1900 2200 2300 2600 E G D F C E B D AG CB F A E G D F CB ED A C G B F A ED GF C E B D A C GF BA E G D F C E BA DC G B F A E G DC FE B D A C G B FE AG
F B E G C A D Tuesday Wednesday Thursday Friday Saturday Sunday Monday
G C F A D B E Monday Tuesday Wednesday Thursday Friday Saturday Sunday
The perpetual calendar makes it possible to find the correct day of the week for any date over a wide range of years. To find the day of the week for any Gregorian or Julian date in the perpetual calendar provided in this table, first find the proper dominical letter (one of the letters A through G) for the year in the upper table. Leap years have two dominical letters, the first applicable to dates in January and February, the second to dates in the remaining months. Then find the same dominical letter in the lower table, in whichever column it appears opposite the month in question. The days then fall as given in the lowest section of the column. [*On and before 1582, October 4 only. **On and after 1582, October 5 only]
Year
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 Month
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
0 700 1400 DC B A G FE D C B AG F E D CB A G F ED C B A GF E D C BA G F E DC
January, October February, March, November April, July May June August September, December 1 8 15 22 29 2 9 16 23 30 3 10 17 24 31 4 11 18 25 5 12 19 26 6 13 20 27 7 14 21 28
100 800 1500* ED C B A GF E D C BA G F E DC B A G FE D C B AG F E D CB A G F ED A D G B E C F Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Julian Calendar 200 300 400 900 1000 1100 FE D C B AG F E D CB A G F ED C B A GF E D C BA G F E DC B A G FE
GF E D C BA G F E DC B A G FE D C B AG F E D CB A G F ED C B A GF
B E A C F D G Saturday Sunday Monday Tuesday Wednesday Thursday Friday
AG F E D CB A G F ED C B A GF E D C BA G F E DC B A G FE D C B AG
Century
500 1200
600 1300
1500**
BA CB … G A F F G E E F D DC ED CB B C A A B G G A F FE GF ED D E C C D B B C A AG BA GF F G E E F D D E C CB DC … A B … G A … F G … ED FE … C D … B C … A B … GF AG … E F … D E C C D B BA CB AG Dominican Letter
C F B D G E A Friday Saturday Sunday Monday Tuesday Wednesday Thursday
D G C E A F B Thursday Friday Saturday Sunday Monday Tuesday Wednesday
1600 2000 2400 BA G F E DC B A G FE D C B AG F E D CB A G F ED C B A GF E D C BA
E A D F B G C Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Gregorian 1700 2100 2500 C B A G FE D C B AG F E D CB A G F ED C B A GF E D C BA G F E DC
Calendar 1800 1900 2200 2300 2600 E G D F C E B D AG CB F A E G D F CB ED A C G B F A ED GF C E B D A C GF BA E G D F C E BA DC G B F A E G DC FE B D A C G B FE AG
F B E G C A D Tuesday Wednesday Thursday Friday Saturday Sunday Monday
G C F A D B E Monday Tuesday Wednesday Thursday Friday Saturday Sunday
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