the year signs

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there are 4 year signs
tecpatl which is flint knife
calli which is house
tochtli which is rabbit
acatl which is reed

each year has a name and a number which is from 1 - 13

example 1900 is 5 tecpatl or 5 flint knife

also to be remembered is the fact that the Aztec year starts approximately around april 21st so people born before this date should list their year as the previous year

example January 1st 1960 would be listed as 12 acatl not 13 flint knife

tecpatl/flint knife	calli/house	tochtli/rabbit	acatl/reed
1900 5	1901 6	1902 7	1903 8
1904 9	1905 10	1906 11	1907 12
1908 13	1909 1	1910 2	1911 3
1912 4	1913 5	1914 6	1915 7
1916 8	1917 9	1918 10	1919 11
1920 12	1921 13	1922 1	1923 2
1924 3	1925 4	1926 5	1927 6
1928 7	1929 8	1930 9	1931 10
1932 11	1933 12	1934 13	1935 1
1936 2	1937 3	1938 4	1939 5
1940 6	1941 7	1942 8	1943 9
1944 10	1945 11	1946 12	1947 13
1948 1	1949 2	1950 3	1951 4
1952 5	1953 6	1954 7	1955 8
1956 9	1957 10	1958 11	1959 12
1960 13	1961 1	1962 2	1963 3
1964 4	1965 5	1966 6	1967 7
1968 8	1969 9	1970 10	1971 11
1972 12	1973 13	1974 1	1975 2
1976 3	1977 4	1978 5	1979 6
1980 7	1981 8	1982 9	1983 10
1984 11	1985 12	1986 13	1987 1
1988 2	1989 3	1990 4	1991 5
1992 6	1993 7	1994 8	1995 9
1996 10	1997 11	1998 12	1999 13
2000 1	2001 2	2002 3	2003 4
2004 5	2005 6	2006 7	2007 8
2009 9	2010 10	2011 11	2012 12
2013 13	2014 1	2015 2	2016 3
2017 4	2018 5	2019 6	2020 7
2021 8	2022 9	2023 10	2024 11
2025 12	2026 13	2027 1	2028 2
2029 3	2030 4	2031 5	2032 6
2033 7	2034 8	2035 9	2036 10
2037 11	2038 12	2039 13	2040 1
2041 2	2042 3	2043 4	2044 5
2045 6	2046 7	2047 8	2048 9
2049 10	2047 11	2048 12	2049 13