If none of m
, d
, y
, h
, min
, s
, and ms
are supplied,
this function returns a time vector of length zero. If more than
one is supplied, they must all have compatible lengths. Shorter
inputs are used cyclically to comprise the maximum length, but
they must be even multiples.
The arguments represent the date and time of day
in the given time zone. Missing arguments are supplied to give a
time of midnight, January 1, 1960.
Leap seconds do not cause NA
values, but can cause times of day to
be off by a second in the days containing them.