Leap year starting on Tuesday explained

A leap year starting on Tuesday is any year with 366 days (i.e. it includes 29 February) that begins on Tuesday, 1 January, and ends on Wednesday, 31 December. Its dominical letters hence are FE. The most recent year of such kind was 2008 and the next one will be 2036 in the Gregorian calendar[1] or, likewise 2020 and 2048 in the obsolete Julian calendar.

Any leap year that starts on Tuesday, Friday or Saturday has only one Friday the 13th; the only one in this leap year occurs in June.

Any leap year that starts on Tuesday has only one Tuesday the 13th: the only one in this leap year occurs in May.

Any leap year that starts on Tuesday has only one Friday the 17th: the only one in this leap year occurs in October.

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 Friday the 17th.

Applicable years

Gregorian Calendar

Leap years that begin on Tuesday, along with those starting on Wednesday, 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).

Decade! 1st !! 2nd !! 3rd !! 4th !! 5th !! 6th !! 7th !! 8th !! 9th !! 10th
17th century1692
18th century
19th century
20th century
21st century2092
22nd century
23rd century
24th century
25th century2492
26th century2504 2532 2560 2588
400-year cycle
0–998 36 64 92
100–199104 132 160 188
200–299228 256 284
300–399324 352 380

Julian Calendar

Like all leap year types, the one starting with 1 January on a Tuesday 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).

Decade! 1st !! 2nd !! 3rd !! 4th !! 5th !! 6th !! 7th !! 8th !! 9th !! 10th
14th century
15th century
16th century1600
17th century
18th century1712 1740 1768 1796
19th century1824 1852 1880
20th century1908 1936 1964 1992
21st century2020 2048 2076
22nd century2104 2132 2160 2188

Holidays

International

Roman Catholic Solemnities

Australia and New Zealand

British Isles

Canada

United States

Notes and References

  1. Web site: The Mathematics of the ISO 8601 Calendar . Robert van Gent . Utrecht University, Department of Mathematics . 2017 . 20 July 2017.