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 366 days 366 days /θri ˈsɪkstiˈsɪks deɪz/

noun

  1. In the Gregorian calendar, a year with 366 days including 29th February; usually any year divisible by 4 is a leap year, with the exception that centenary years are not leap years unless divisible by 400  ( 366 days , bissextile year , intercalary year , leap year )
    In the Gregorian calendar, a year with 366 days including 29th February; usually any year divisible by 4 is a leap year, with the exception that centenary years are not leap years unless divisible by 400