A leap year starting on Friday is any year with 366 days (i.e. it includes 29 February) that begins on Friday 1 January and ends on Saturday 31 December. Its dominical letters hence are CB. The most recent year of such kind was 2016 and the next one will be 2044 in the Gregorian calendar or, likewise, 2000 and 2028 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 May. Common years starting on Saturday share this characteristic.
In this type of year, all dates (except 29 February) fall on their respective weekdays 58 times in the 400 year Gregorian calendar cycle. Leap years starting on Sunday share this characteristic.
Calendars
Applicable years
Gregorian Calendar
Leap years that begin on Friday, along with those starting on Sunday, occur most frequently: 15 of the 97 (≈ 15.46%) total leap years in a 400-year cycle of the Gregorian calendar. Thus, their overall occurrence is 3.75% (15 out of 400).
Julian Calendar
Like all leap year types, the one starting with 1 January on a Friday 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).
Holidays
International
Valentine's Day falls on a Sunday. This is the only type of leap year when Valentine’s Day falls in ISO week 6. They fall in ISO week 7 in all other leap years. The leap day (February 29) falls on a Monday World Day for Grandparents and the Elderly falls on July 24 Halloween falls on a Monday Christmas Day falls on a Sunday. This is the only type of leap year when Christmas Day falls in ISO week 51. They fall in ISO week 52 in all other leap years.
Roman Catholic Solemnities
Epiphany falls on a Wednesday
Candlemas falls on a Tuesday
Saint Joseph's Day falls on a Saturday
The Annunciation of Jesus falls on a Friday
The Nativity of John the Baptist falls on a Friday
The Solemnity of Saints Peter and Paul falls on a Saturday
The Transfiguration of Jesus falls on a Saturday
The Assumption of Mary falls on a Monday
The Exaltation of the Holy Cross falls on a Wednesday
All Saints' Day falls on a Tuesday
All Souls' Day falls on a Wednesday
The Feast of Christ the King falls on its earliest possible date, November 20 (or on October 30 in versions of the calendar between 1925 and 1962) The First Sunday of Advent falls on its earliest possible date, November 27. This is the only leap year when The First Sunday of Advent falls in ISO week 47. They fall in ISO week 48 in all other leap years. The Immaculate Conception falls on a Thursday Gaudete Sunday falls on its earliest possible date, December 11. This is the only leap year when Gaduete Sunday falls in ISO week 49. They fall in ISO week 50 in all other leap years. Rorate Sunday falls on its earliest possible date, December 18. This is the only leap year when Rorate Sunday falls in ISO week 50. They fall in ISO week 51 in all other leap years.
Australia and New Zealand
Australia Day falls on a Tuesday
Waitangi Day falls on a Saturday
Daylight saving ends on April 3
ANZAC Day falls on a Monday
Mother's Day falls on its earliest possible date, May 8. This is the only leap year when Mother’s Day falls in ISO week 18. They fall in ISO week 19 in all other leap years. Father's Day falls on September 4 Daylight saving begins on September 25 in New Zealand and October 2 in Australia
British Isles
Saint David's Day falls on a Tuesday
Mother's Day falls on March 6, March 13, March 20, March 27 or April 3
Daylight saving begins on March 27
Saint Patrick's Day falls on a Thursday
Saint George's Day falls on a Saturday
Father's Day falls on June 19
Orangeman's Day falls on a Tuesday
Daylight saving ends on October 30
Guy Fawkes Night falls on a Saturday
Saint Andrew's Day falls on a Wednesday
Canada
Daylight saving begins on March 13
Mother's Day falls on its earliest possible date, May 8. This is the only leap year when Mother’s Day falls in ISO week 18. They fall in ISO week 19 in all other leap years Victoria Day falls on May 23 Father's Day falls on June 19 Canada Day falls on a Friday Labour Day falls on September 5 Thanksgiving Day falls on October 10 Daylight saving ends on November 6