Get daylight savings time indicator of a date-time

Date-time must be a POSIXct, POSIXlt, Date, chron, yearmon, yearqtr, zoo, zooreg, timeDate, xts, its, ti, jul, timeSeries, and fts objects.

Usage

dst(x)

Arguments

x

a date-time object

Value

A logical. TRUE if DST is in force, FALSE if not, NA if unknown.

Details

A date-time's daylight savings flag can not be set because it depends on the date-time's year, month, day, and hour values.

Examples

x <- ymd("2012-03-26")
dst(x)
#> [1] FALSE