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.
- a date-time object
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.
- Daylight savings time flag. Positive if in force, zero if not, negative if unknown.
x <- now() dst(x)