Identical Calendar Years

Gregorian Calendars have fourteen arrangements of dates on days of weekly cycles. There’s one for each day of the week that begins common years and one for each day of the week that begins leap years.
Each of these fourteen arrangements repeat every 28 years as long as every fourth year has a 29-day February. This is the case within every century, and for two consecutive centuries if the second of them begins on an intercalary year.
During those time frames the repetitions are not only every 28 years—common year calendars also repeat after each six or eleven years in similar sequences with either 6-11-11, 11-6-11 or 11-11-6 years between them. A.D. numbers of repeating years that cycle thru those patterns for two centuries are shown in the table below.

Repeating Calendar Years for 1901 thru 2099

Common-year calendar rows have a tan background. Leap year rows have a light blue background.
Each day of the week is followed in its rows by all year numbers from 1901 thru 2099 whose January 1st is on that day.
Column headings of + 6 or + 11 indicate the number of years following the prior identical calendar year.
Sunday’s cycle:    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11
Sunday 1905 1911 1922 1933 1939 1950 1961 1967 1978 1989 1995 2006 2017 2023 2034 2045 2051 2062 2073 2079 2090   n/a
Sunday 1928 1956 1984 2012 2040 2068 2096
Monday’s cycle:   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11
Monday* 1906 1917 1923 1934 1945 1951 1962 1973 1979 1990 2001 2007 2018 2029 2035 2046 2057 2063 2074 2085 2091   n/a
Monday 1912 1940 1968 1996 2024 2052 2080
Tuesday’s cycle:    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11
Tuesday 1901 1907 1918 1929 1935 1946 1957 1963 1974 1985 1991 2002 2013 2019 2030 2041 2047 2058 2069 2075 2086 2097
Tuesday 1924 1952 1980 2008 2036 2064 2092
Wednesday’s cycle:   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11
Wednesday 1902 1913 1919 1930 1941 1947 1958 1969 1975 1986 1997 2003 2014 2025 2031 2042 2053 2059 2070 2081 2087 2098
Wednesday 1908 1936 1964 1992 2020 2048 2076
Thursday’s cycle:   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6
Thursday 1903 1914 1925 1931 1942 1953 1959 1970 1981 1987 1998 2009 2015 2026 2037 2043 2054 2065 2071 2082 2093 2099
Thursday 1920 1948 1976 2004 2032 2060 2088
Friday’s cycle:    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11
Friday 1909 1915 1926 1937 1943 1954 1965 1971 1982 1993 1999 2010 2021 2027 2038 2049 2055 2066 2077 2083 2094   n/a
Friday 1904 1932 1960 1988 2016 2044 2072   **
Saturday’s cycle:   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11   + 11    + 6   + 11
Saturday 1910 1921 1927 1938 1949 1955 1966 1977 1983 1994 2005 2011 2022 2033 2039 2050 2061 2067 2078 2089 2095   n/a
Saturday 1916 1944 1972 2000 2028 2056 2084
calendar, years, year number, day, repeatingNotes:
*   1900 also began on Monday but it doesn’t fit into that day’s common year 1906 thru 2091 repetition pattern of 11-6-11.
** 2100 will begin on Friday but it is a common year.

Table year numbers stop at 2099 because that’s where the repeating cycles of number of years between identical calendars for these two centuries end. However, those same patterns for time spans between identical years will begin again starting with 2101. All but two days of the week will have a different common year cycle pattern than they had from 1901 thru 2099.
Even though 1900 and 2100 are not included in this page’s table showing common year patterns of years between them, they are separated both before and after by 6 years from their nearest identical year.