A common year starting on Friday is any non-

leap year A leap year (also known as an intercalary year or year) is a that contains an additional day (or, in the case of a , a month) added to keep the calendar year synchronized with the or . Because astronomical events and seasons do not repeat in a ...

(i.e. a year with 365 days) that begins on

Friday Friday is the day of the week between Thursday and Saturday. In countries adopting the "Monday-first" convention it is the fifth day of the week. In countries that adopt the "Sunday-first" convention, it is the sixth day of the week. In most We ...

, 1 January, and ends on Friday, 31 December. Its

dominical letterDominical letters or Sunday letters are a method used to determine the day of the week for particular dates. When using this method, each year is assigned a letter (or pair of letters for leap years) depending on which day of the week the year starts ...

hence is C. The most recent year of such kind was

2021 2021 is scheduled to host most major events that were originally scheduled for 2020, including the 2020 CONCACAF Nations League Finals, Eurovision Song Contest 2021, Eurovision Song Contest, UEFA Euro 2020, 2020 Summer Olympics, 2021 Copa Améri ...

and the next one will be

2027 Predicted and scheduled events * January 1 – Assuming no further extensions to the term of copyrights become law in the interim, books, films, and other works published in 1931 will enter the public domain in the United States. * February ...

in the

Gregorian calendar The Gregorian calendar is the used in most of the world. It was introduced in October 1582 by as a modification of the , reducing the average year from 365.25 days to 365.2425 days, and adjusting for the drift in the that the inaccuracy ha ...

, or, likewise,

2005

2011 A series of protests and government overthrows, known as the Arab Spring The Arab Spring ( ar, الربيع العربي) was a series of anti-government protests, uprisings, and armed rebellions that spread across much of the Arab worl ...

and

2022 The United Nations The United Nations (UN) is an intergovernmental organization that aims to maintain international peace and international security, security, develop friendly relations among nations, achieve international cooperatio ...

in the obsolete

Julian calendar The Julian calendar, proposed by Julius Caesar Gaius Julius Caesar (; 12 July 100 BC – 15 March 44 BC) was a Roman Roman or Romans usually refers to: *Rome, the capital city of Italy *Ancient Rome, Roman civilization from 8th century B ...

, see below for more. This common year is one of the three possible common years in which a century year can begin on, and occurs in century years that yield a remainder of 100 when divided by 400. The most recent such year was 1700 and the next one will be 2100. Any common year that starts on Wednesday,

Saturday Saturday is the day of the week between Friday and Sunday. The Romans named Saturday ("Saturn's Day") no later than the 2nd century for the planet Saturn, which controlled the first hour of that day, according to Vettius Valens. The day's name ...

has only one

Friday the 13th Friday the 13th is considered an unlucky day in Western culture, Western superstition. It occurs when the 13th day of the month in the Gregorian calendar falls on a Friday, which happens at least once every year but can occur up to three times ...

: the only one in this common year occurs in August. Leap years starting on Thursday share this characteristic, but also have another one in February. In this common year, February is rectangular where weeks start on Monday, Martin Luther King Jr. Day is on

January 18 Events Pre-1600 * – Seven-year-old succeeds his maternal grandfather as . He dies ten months later. * – in fail. * – abdicates the Chinese throne in favour of his son . * – King marries , daughter of , uniting the ...

Valentine’s Day Valentine's Day, also called Saint Valentine's Day or the Feast of Saint Valentine, is celebrated annually on February 14. It originated as a Christian feast day honoring one or two early Christian martyrs named Saint Valentine and, throug ...

is on a

Sunday Sunday is the day of the week between Saturday and Monday. In most Western countries, Sunday is a day of rest and a part of the Workweek and weekend, weekend, whereas in much of the rest of the world, it is considered the first day of the week. ...

Sunday

Presidents Day Washington's Birthday is a Federal holidays in the United States, federal holiday in the United States celebrated on the third Monday of February in honor of George Washington, the first president of the United States, who was born on February 2 ...

is on its earliest possible date,

February 15 Events Pre-1600 *438 Year 438 ( CDXXXVIII) was a common year starting on SaturdayA common year starting on Saturday is any non-leap year A leap year (also known as an intercalary year or bissextile year) is a calendar year that contain ...

, St. Patrick’s Day is on a

Wednesday Wednesday is the day of the week between Tuesday and Thursday. According to international standard ISO 8601 it is the third day of the week. In countries that have Friday as their holiday and in some Muslim world, Muslim countries, Wednesday ...

Memorial Day Memorial Day (originally known as Decoration Day) is a federal holiday in the United States In the United States, a federal holiday is a calendar date that is recognized and designated by the federal government of the United States as a h ...

is on its latest possible date,

May 31 Events Pre-1600 * 455 __NOTOC__ Year 455 (Roman numerals, CDLV) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Valentinianus a ...

, U.S. Independence Day and

Halloween Halloween or Hallowe'en (a contraction of "All Hallows' evening"), less commonly known as Allhalloween, All Hallows' Eve, or All Saints' Eve, is a celebration observed in many countries on 31 October, the eve of the Western Christian 250p ...

are on Sunday,

Labor Day Labor Day is a federal holiday in the United States In the United States, a federal holiday is a calendar date that is recognized and designated by the federal government of the United States as a holiday. Every year on a U.S. federal holid ...

is on

September 6 Events * 394 – Battle of the Frigidus: Roman Emperor The Roman Emperor was the ruler of the Roman Empire during the History of the Roman Empire, imperial period (starting in 27 BC). The emperors used a variety of different titles ...

Columbus Day Columbus Day is a national holiday in many countries of the Americas and elsewhere which officially celebrates the anniversary of Christopher Columbus Christopher Columbus * lij, Cristoffa C(or)ombo * es, Cristóbal Colón * pt, Cris ...

is on

October 11 Events Pre-1600 *1138 Year 1138 (Roman numerals, MCXXXVIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. Events By place Europe * March 7 – Conrad III of Germany, Conr ...

Election Day Election day or polling day is the day on which general election A general election is a political voting election where generally all or most members of a given political body are chosen. These are usually held for a nation, state, or territo ...

in the United States is on its earliest possible date,

November 2 Events * 619 – A qaghan of the Western Turkic Khaganate , conventional_long_name = Western Turkic Khaganate , common_name = Western Turkic Khaganate , era = Early Middle Ages , status ...

Thanksgiving Thanksgiving is a national holiday A holiday is a day set aside by Norm (social), custom or by law on which normal activities, especially business or work including school, are suspended or reduced. Generally, holidays are intended to allow ...

is on

November 25 Events Pre-1600 *571 BC The year 571 BC was a year of the pre-Julian Roman calendar. In the Roman Empire The Roman Empire ( la, Imperium Rōmānum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was ...

, and

Christmas Christmas is an annual festival commemorating Nativity of Jesus, the birth of Jesus Christ, observed primarily on December 25 as a religious and cultural celebration among billions of people Observance of Christmas by country, around the world ...

is on a

Saturday Saturday is the day of the week File:Heptagram of the celestial bodies of the weekdays.png, Heptagram of the seven celestial bodies of the week The names of the days of the week in many languages are derived from the names of the classica ...

. This common year is also the longest gap between Halloween (October 31) and the end of daylight saving time in the USA (November 7) by seven days or one week. Prior to 2007, Halloween and the end of daylight savings time in the US fell on the same day in this common year and the last such year where Daylight Savings Time ended on this day was 1999. The first year when Daylight Savings Time ended on the new date was 2010.

Calendars

This is the only year type where the ''n''th " Doomsday" (this year Sunday) is not in ISO week ''n''; it is in ISO week ''n''-1.

Applicable years

Gregorian Calendar

In the (currently used) Gregorian calendar, alongside

Monday Monday is the between and . According to the 's standard, it is the first of the and in countries that adopt the "Sunday-first" convention, it is the second day of the week. The name of Monday is derived from ''Mōnandæg'' and ''Mone ...

, 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 Friday. The 28-year sub-cycle only spans across century years divisible by 400, e.g. 1600, 2000, and 2400. 400 year cycle century 1: 010, 021, 027, 038, 049, 055, 066, 077, 083, 094, 100 century 2: 106, 117, 123, 134, 145, 151, 162, 173, 179, 190 century 3: 202, 213, 219, 230, 241, 247, 258, 269, 275, 286, 297 century 4: 309, 315, 326, 337, 343, 354, 365, 371, 382, 393, 399

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). 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 4, 15 and 26 of the cycle are common years beginning on Friday. 2017 is year 10 of the cycle. Approximately 10.71% of all years are common years beginning on Friday.

References

{{DEFAULTSORT:Common Year Starting On Friday Gregorian calendar Julian calendar Friday