366 days - in the Gregorian calendar: any year divisible by 4 except centenary years divisible by 400bissextile year, intercalary year, leap yeartwelvemonth, year, yr - a period of time containing 365 (or 366) days; "she is 4 years old"; "in the year 1920"
366 days
noun
Synonyms for 366 days
noun in the Gregorian calendar: any year divisible by 4 except centenary years divisible by 400
366 days - in the Gregorian calendar: any year divisible by 4 except centenary years divisible by 400