Dates {base} | R Documentation |
Description of the class "Date"
representing calendar dates.
Dates are represented as the number of days since 1970-01-01, with negative values for earlier dates. They are always printed following the rules of the current Gregorian calendar, even though that calendar was not in use long ago (it was adopted in 1752 in Great Britain and its colonies).
It is intended that the date should be an integer, but this is not
enforced in the internal representation. Fractional days will be
ignored when printing. It is possible to produce fractional days via
the mean
method or by adding or subtracting an object of class
"difftime"
.
Sys.Date
for the current date.
format.Date
for conversion to and from character strings.
plot.Date
and
hist.Date
for plotting.
weekdays
for convenience extraction functions.
seq.Date
, cut.Date
,
round.Date
for utility operations.
DateTimeClasses
for date-time classes.
(today <- Sys.Date()) format(today, "%d %b %Y") # with month as a word (tenweeks <- seq(today, len=10, by="1 week")) # next ten weeks weekdays(today) months(tenweeks) as.Date(.leap.seconds)