Common year starting on Friday
Encyclopedia
This is the calendar
Calendar
A calendar is a system of organizing days for social, religious, commercial, or administrative purposes. This is done by giving names to periods of time, typically days, weeks, months, and years. The name given to each day is known as a date. Periods in a calendar are usually, though not...

 for any common year
Common year
A common year is a common type of calendar year. It has exactly 365 days and so is not a leap year. More generally, it is a calendar year without intercalation....

 starting on Friday
Friday
Friday is the day between Thursday and Saturday. In countries adopting Monday-first conventions as recommended by the international standard ISO 8601, it is the fifth day of the week. It is the sixth day in countries that adopt a Sunday-first convention as in Abrahamic tradition...

, January 1 (dominical letter
Dominical letter
Dominical letters are letters A, B, C, D, E, F and G assigned to days in a cycle of seven with the letter A always set against 1 January as an aid for finding the day of the week of a given calendar date and in calculating Easter....

 C). Examples: Gregorian
Gregorian calendar
The Gregorian calendar, also known as the Western calendar, or Christian calendar, is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named, by a decree signed on 24 February 1582, a papal bull known by its opening words Inter...

 years 1993, 1999, 2010 and 2021
or Julian
Julian calendar
The Julian calendar began in 45 BC as a reform of the Roman calendar by Julius Caesar. It was chosen after consultation with the astronomer Sosigenes of Alexandria and was probably designed to approximate the tropical year .The Julian calendar has a regular year of 365 days divided into 12 months...

 years 1910 and 1899 (see bottom tables).

A common year
Common year
A common year is a common type of calendar year. It has exactly 365 days and so is not a leap year. More generally, it is a calendar year without intercalation....

 is a year with 365 days, i.e., not a leap year
Leap year
A leap year is a year containing one extra day in order to keep the calendar year synchronized with the astronomical or seasonal year...

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Millennium Century Gregorian Year
2nd Millennium: 19th century: 1802 1813 1819 1830 1841 1847 1858 1869 1875 1886 1897
2nd Millennium: 20th century: 1909 1915 1926 1937 1943 1954 1965 1971 1982 1993 1999
3rd Millennium: 21st century: 2010 2021 2027 2038 2049 2055 2066 2077 2083 2094 2100
3rd Millennium: 22nd century: 2106 2117 2123 2134 2145 2151 2162 2173 2179 2190

































































Millennium Century Julian Year
2nd Millennium: 19th century: 1809 1815 1826 1837 1843 1854 1865 1871 1882 1893 1899
2nd Millennium: 20th century: 1910 1921 1927 1938 1949 1955 1966 1977 1983 1994
3rd Millennium: 21st century: 2005 2011 2022 2033 2039 2050 2061 2067 2078 2089 2095
3rd Millennium: 22nd century: 2106 2117 2123 2134 2145 2151 2162 2173 2179 2190


This is the only year type where the nth "Doomsday
Doomsday (weekday)
The Doomsday rule or Doomsday algorithm is a way of calculating the day of the week of a given date. It provides a perpetual calendar since the Gregorian calendar moves in cycles of 400 years....

" (this year Sunday) is not in ISO week
ISO week date
The ISO week date system is a leap week calendar system that is part of the ISO 8601 date and time standard. The system is used in government and business for fiscal years, as well as in timekeeping....

n; it is in ISO week n-1.
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