Common year starting on Sunday

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A common year starting on Sunday is any non-leap year (i.e. a year with 365 days) that begins on Sunday, 1 January, and ends on Sunday, 31 December. Its dominical letter hence is A. The most recent year of such kind was 2023, and the next one will be 2034 in the Gregorian calendar,[1] or, likewise, 2018 and 2029 in the obsolete Julian calendar, see below for more.

Any common year that starts on a Sunday has two Friday the 13ths: those two in this common year occur in January and October.

Calendars

More information Calendar for any common year starting on Sunday, presented as common in many English-speaking areas, January ...
Calendar for any common year starting on Sunday,
presented as common in many English-speaking areas
January
Su Mo Tu We Th Fr Sa
1234567
891011121314
15161718192021
22232425262728
293031  
 
February
Su Mo Tu We Th Fr Sa
1234
567891011
12131415161718
19202122232425
262728  
 
March
Su Mo Tu We Th Fr Sa
1234
567891011
12131415161718
19202122232425
262728293031  
 
April
Su Mo Tu We Th Fr Sa
1
2345678
9101112131415
16171819202122
23242526272829
30  
May
Su Mo Tu We Th Fr Sa
123456
78910111213
14151617181920
21222324252627
28293031  
 
June
Su Mo Tu We Th Fr Sa
123
45678910
11121314151617
18192021222324
252627282930
 
July
Su Mo Tu We Th Fr Sa
1
2345678
9101112131415
16171819202122
23242526272829
3031  
August
Su Mo Tu We Th Fr Sa
12345
6789101112
13141516171819
20212223242526
2728293031  
 
September
Su Mo Tu We Th Fr Sa
12
3456789
10111213141516
17181920212223
24252627282930
 
October
Su Mo Tu We Th Fr Sa
1234567
891011121314
15161718192021
22232425262728
293031  
 
November
Su Mo Tu We Th Fr Sa
1234
567891011
12131415161718
19202122232425
2627282930  
 
December
Su Mo Tu We Th Fr Sa
12
3456789
10111213141516
17181920212223
24252627282930
31  
Close
More information ISO 8601-conformant calendar with week numbers for any common year starting on Sunday (dominical letter A), January ...
ISO 8601-conformant calendar with week numbers for
any common year starting on Sunday (dominical letter A)
January
Wk Mo Tu We Th Fr Sa Su
52 01
01 02030405060708
02 09101112131415
03 16171819202122
04 23242526272829
05 3031  
February
Wk Mo Tu We Th Fr Sa Su
05 0102030405
06 06070809101112
07 13141516171819
08 20212223242526
09 2728  
   
March
Wk Mo Tu We Th Fr Sa Su
09 0102030405
10 06070809101112
11 13141516171819
12 20212223242526
13 2728293031  
   
April
Wk Mo Tu We Th Fr Sa Su
13 0102
14 03040506070809
15 10111213141516
16 17181920212223
17 24252627282930
   
May
Wk Mo Tu We Th Fr Sa Su
18 01020304050607
19 08091011121314
20 15161718192021
21 22232425262728
22 293031  
   
June
Wk Mo Tu We Th Fr Sa Su
22 01020304
23 05060708091011
24 12131415161718
25 19202122232425
26 2627282930  
   
July
Wk Mo Tu We Th Fr Sa Su
26 0102
27 03040506070809
28 10111213141516
29 17181920212223
30 24252627282930
31 31  
August
Wk Mo Tu We Th Fr Sa Su
31 010203040506
32 07080910111213
33 14151617181920
34 21222324252627
35 28293031  
   
September
Wk Mo Tu We Th Fr Sa Su
35 010203
36 04050607080910
37 11121314151617
38 18192021222324
39 252627282930
   
October
Wk Mo Tu We Th Fr Sa Su
39 01
40 02030405060708
41 09101112131415
42 16171819202122
43 23242526272829
44 3031  
November
Wk Mo Tu We Th Fr Sa Su
44 0102030405
45 06070809101112
46 13141516171819
47 20212223242526
48 27282930  
   
December
Wk Mo Tu We Th Fr Sa Su
48 010203
49 04050607080910
50 11121314151617
51 18192021222324
52 25262728293031
   
Close

Applicable years

Summarize
Perspective

Gregorian Calendar

In the (currently used) Gregorian calendar, alongside Monday, Wednesday, Friday or Saturday, the fourteen types of year (seven common, seven leap) repeat in a 400-year cycle (20871 weeks). Forty-three common years per cycle or exactly 10.75% start on a Sunday. The 28-year sub-cycle only spans across century years divisible by 400, e.g. 1600, 2000, and 2400.

More information 0–99, 100–199 ...
400-year cycle
0–99 6172334455162737990
100–199 102113119130141147158169175186197
200–299 209215226237243254265271282293299
300–399 305311322333339350361367378389395
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Julian Calendar

In the now-obsolete Julian calendar, the fourteen types of year (seven common, seven leap) repeat in a 28-year cycle (1461 weeks). A leap year has two adjoining dominical letters (one for January and February and the other for March to December, as 29 February has no letter). This sequence occurs exactly once within a cycle, and every common letter thrice.

As the Julian calendar repeats after 28 years that means it will also repeat after 700 years, i.e. 25 cycles. The year's position in the cycle is given by the formula ((year + 8) mod 28) + 1). Years 11, 22 and 28 of the cycle are common years beginning on Sunday. 2017 is year 10 of the cycle. Approximately 10.71% of all years are common years beginning on Sunday.

More information Decade, 1st ...
Julian common years starting on Sunday
Decade 1st2nd3rd4th5th6th7th8th9th10th
15th century 14021413141914301441144714581469147514861497
16th century 15031514152515311542155315591570158115871598
17th century 16091615162616371643165416651671168216931699
18th century 1710172117271738174917551766177717831794
19th century 18051811182218331839185018611867187818891895
20th century 1906191719231934194519511962197319791990
21st century 20012007201820292035204620572063207420852091
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References

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