Look at perpertual calendars for the 20th and 21st century

Below you will find the perpetual calendars for the 20th and 21st century in both the 3 column and 4 column format:

There are two sets of Calendars, one that has three months across, the other with four months across. These are each organized in the format below:

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1901 2001	1911 2011	1921 2021	1931 2031	1941 2041	1951 2051	1961 2061	1971 2071	1981 2081	1991 2091
1902 2002	1912 2012	1922 2022	1932 2032	1942 2042	1952 2052	1962 2062	1972 2072	1982 2082	1992 2092
1903 2003	1913 2013	1923 2023	1933 2033	1943 2043	1953 2053	1963 2063	1973 2073	1983 2083	1993 2093
1904 2004	1914 2014	1924 2024	1934 2034	1944 2044	1954 2054	1964 2064	1974 2074	1984 2084	1994 2094
1905 2005	1915 2015	1925 2025	1935 2035	1945 2045	1955 2055	1965 2065	1975 2075	1985 2085	1995 2095
1906 2006	1916 2016	1926 2026	1936 2036	1946 2046	1956 2056	1966 2066	1976 2076	1986 2086	1996 2096
1907 2007	1917 2017	1927 2027	1937 2037	1947 2047	1957 2057	1967 2067	1977 2077	1987 2087	1997 2097
1908 2008	1918 2018	1928 2028	1938 2038	1948 2048	1958 2058	1968 2068	1978 2078	1988 2088	1998 2098
1909 2009	1919 2019	1929 2029	1939 2039	1949 2049	1959 2059	1969 2069	1979 2079	1989 2089	1999 2099
1910 2010	1920 2020	1930 2030	1940 2040	1950 2050	1960 2060	1970 2070	1980 2080	1990 2090	2000 2100

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1901 2001	1911 2011	1921 2021	1931 2031	1941 2041	1951 2051	1961 2061	1971 2071	1981 2081	1991 2091
1902 2002	1912 2012	1922 2022	1932 2032	1942 2042	1952 2052	1962 2062	1972 2072	1982 2082	1992 2092
1903 2003	1913 2013	1923 2023	1933 2033	1943 2043	1953 2053	1963 2063	1973 2073	1983 2083	1993 2093
1904 2004	1914 2014	1924 2024	1934 2034	1944 2044	1954 2054	1964 2064	1974 2074	1984 2084	1994 2094
1905 2005	1915 2015	1925 2025	1935 2035	1945 2045	1955 2055	1965 2065	1975 2075	1985 2085	1995 2095
1906 2006	1916 2016	1926 2026	1936 2036	1946 2046	1956 2056	1966 2066	1976 2076	1986 2086	1996 2096
1907 2007	1917 2017	1927 2027	1937 2037	1947 2047	1957 2057	1967 2067	1977 2077	1987 2087	1997 2097
1908 2008	1918 2018	1928 2028	1938 2038	1948 2048	1958 2058	1968 2068	1978 2078	1988 2088	1998 2098
1909 2009	1919 2019	1929 2029	1939 2039	1949 2049	1959 2059	1969 2069	1979 2079	1989 2089	1999 2099
1910 2010	1920 2020	1930 2030	1940 2040	1950 2050	1960 2060	1970 2070	1980 2080	1990 2090	2000 2100

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