lubridate (version 0.1)

leap.year: Is a year a leap year?

Description

Is a year a leap year?

Usage

leap.year(date)

Arguments

date

a date-time object or a year

Value

• TRUE if x is a leap year, FALSE otherwise

Details

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.

aliases leap.year leap_year leapyear

Examples

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}