If x is a recognized date-time object, leap_year will return whether x occurs during a leap year. If x is a number, leap_year returns whether it would be a leap year under the Gregorian calendar.
leap_year(date)
TRUE if x is a leap year, FALSE otherwise
a date-time object or a year
x <- as.Date("2009-08-02") leap_year(x) # FALSE leap_year(2009) # FALSE leap_year(2008) # TRUE leap_year(1900) # FALSE leap_year(2000) # TRUE
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