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Leap year starting on Wednesday

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Template:Short description A leap year starting on Wednesday is any year with 366 days (i.e. it includes 29 February) that begins on Wednesday 1 January and ends on Thursday 31 December. Its dominical letters hence are ED. The most recent year of such kind was 2020, and the next one will be 2048 in the Gregorian calendar, or likewise, 2004 and 2032 in the obsolete Julian calendar, see below for more.<ref name="math">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Any leap year that starts on Wednesday has two Friday the 13ths: those two in this leap year occur in March and November. Common years starting on Thursday share this characteristic, but also have another in February.

Leap years starting on Sunday also share a similar characteristic to this type of leap year, three Friday the 13th's have a three month gap between them, the former two being in the common year preceding this type of leap year, those being September and December, and the latter being in this type of year, that being March. Leap years starting on Sunday share this by having January, April and July three months apart from each other.

This is the only leap year with three occurrences of Friday the 17th: those three in this leap year occur three months (13 weeks) apart: in January, April, and July. Common years starting on Sunday share this characteristic, in the months of February, March, and November.

From August of the common year preceding that year until October in this type of year is also the longest period (14 months) that occurs without a Tuesday the 13th, as in 2019-20. Common years starting on Saturday share this characteristic, from July of the year that precedes it to September in that type of year, as in 2021-22.

This year has four months (February, March, August and November) which begin on a weekend-day.

CalendarsEdit

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Applicable yearsEdit

Gregorian CalendarEdit

Leap years that begin on Wednesday, along with those starting on Tuesday, occur at a rate of approximately 14.43% (14 out of 97) of all total leap years in a 400-year cycle of the Gregorian calendar. Thus, their overall occurrence is 3.5% (14 out of 400).

For this kind of year, the corresponding ISO year has 53 weeks.

Gregorian leap years starting on Wednesday<ref name=math/>
Decade 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th
16th century prior to first adoption (proleptic) 1592
17th century 1620 1648 1676
18th century 1716 1744 1772
19th century 1812 1840 1868 1896
20th century 1908 1936 1964 1992
21st century 2020 2048 2076
22nd century 2116 2144 2172
23rd century 2212 2240 2268 2296
24th century 2308 2336 2364 2392
25th century 2420 2448 2476
26th century 2516 2544 2572
27th century 2612 2640 2668 2696
400-year cycle
0–99 20 48 76
100–199 116 144 172
200–299 212 240 268 296
300–399 308 336 364 392

Julian CalendarEdit

Like all leap year types, the one starting with 1 January on a Wednesday occurs exactly once in a 28-year cycle in the Julian calendar, i.e. in 3.57% of years. 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).

Julian leap years starting on Wednesday
Decade 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th
15th century 1416 1444 1472 1500
16th century 1528 1556 1584
17th century 1612 1640 1668 1696
18th century 1724 1752 1780
19th century 1808 1836 1864 1892
20th century 1920 1948 1976
21st century 2004 2032 2060 2088
22nd century 2116 2144 2172 2200

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HolidaysEdit

InternationalEdit

Roman Catholic SolemnitiesEdit

Australia and New ZealandEdit

British IslesEdit

CanadaEdit

  • Daylight saving begins on its earliest possible date, March 8
  • Mother's Day falls on May 10
  • Victoria Day falls on its earliest possible date, May 18
  • Father's Day falls on its latest possible date, June 21. This is the only leap year when Victoria Day and Labour Day are 34 days apart. They are 27 days apart in all other leap years.
  • Canada Day falls on a Wednesday
  • Labour Day falls on its latest possible date, September 7 – this is the only leap year when Victoria Day and Labour Day are sixteen weeks apart (they are fifteen weeks apart in all other leap years)
  • Thanksgiving Day falls on October 12
  • Daylight saving ends on its earliest possible date, November 1 -This is the only leap year when Labour Day and the end of Daylight Saving Time are 55 days apart. They are 62 days apart in all other leap years

United StatesEdit

  • Martin Luther King Jr. Day falls on January 20
  • President's Day falls on February 17
  • Daylight saving begins on its earliest possible date, March 8
  • Mother's Day falls on May 10
  • Memorial Day falls on its earliest possible date, May 25
  • Juneteenth falls on a Friday
  • Father's Day falls on its latest possible date, June 21. This is the only leap year when Memorial Day and Father’s Day are 27 days apart. They are 20 days apart in all other leap years. This is also the only leap year when the start of Daylight Saving Time and Father’s Day are 15 weeks apart. They are 14 weeks apart in all other leap years
  • Independence Day falls on a Saturday
  • Labor Day falls on its latest possible date, September 7 – this is the only leap year when Memorial Day and Labor Day are fifteen weeks apart (they are fourteen weeks apart in all other leap years). This is the only leap year when the start of Daylight Saving Time and Labor Day are 183 days apart. They are 176 days apart in all other leap years.
  • Grandparents' Day falls on its latest possible date, September 13. This is the only leap year when Memorial Day and Grandparent’s Day are 111 days apart. They are 104 days apart in all other leap years. This is also the only leap year when the start of Daylight Saving Time and Grandparent’s Day are 27 weeks apart. They are 26 weeks apart in all other leap years
  • Columbus Day falls on October 12
  • Daylight saving ends on its earliest possible date, November 1. This is the only leap year when Labor Day and the end of Daylight Saving Time are 55 days apart. They are 62 days apart in all other leap years. This is also the only leap year when Father’s Day and the end of Daylight Saving Time are 19 weeks apart. They are 20 weeks apart in all other leap years. This is also the only leap year when Grandparent’s Day and the end of Daylight Saving Time are 7 weeks apart. They are 8 weeks apart in all other leap years
  • Election Day falls on November 3, its 2nd earliest election day, only surpassed by November 2.
  • Thanksgiving Day falls on November 26

ReferencesEdit

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Year starts Common years Leap years
1 Jan Count Ratio 31 Dec DL DD Count Ratio 31 Dec DL DD Count Ratio
Sun 58 14.50 % Sun A Tue 43 10.75 % Mon AG Wed 15 Template:03.75 %
Mon 56 14.00 % Mon G Wed 43 10.75 % Tue GF Thu 13 Template:03.25 %
Tue 58 14.50 % Tue F Thu 44 11.00 % Wed FE Fri 14 Template:03.50 %
Wed 57 14.25 % Wed E Fri 43 10.75 % Thu ED Sat 14 Template:03.50 %
Thu 57 14.25 % Thu D Sat 44 11.00 % Fri DC Sun 13 Template:03.25 %
Fri 58 14.50 % Fri C Sun 43 10.75 % Sat CB Mon 15 Template:03.75 %
Sat 56 14.00 % Sat B Mon 43 10.75 % Sun BA Tue 13 Template:03.25 %
∑ 400 100.0 % 303 75.75 % 97 24.25 %

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