19g - 20g - 21g 1920au 1930au 1940au 1950au 1960au - 1970au - 1980au 1990au 2000au 2010au 2020au 1969 1970 1971 1972 1973 - 1974 - 1975 1976 1977 1978 1979
Chwefror
Mawrth
Ebrill Mai Mehefin
Gorffennaf
Awst
Medi
Hydref Tachwedd
Rhagfyr
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