

   RReettuurrnn VVaarriioouuss PPeerriiooddss ffrroomm aa CChhrroonn oorr DDaatteess OObbjjeecctt

        days(x)
        weekdays(x, abb = TRUE)
        months(x, abb = TRUE)
        quarters(x, abb = TRUE)
        years(x)

   AArrgguummeennttss::

          x: a dates object.

        abb: should abbreviated names be returned? Default is
             `TRUE'.

   VVaalluuee::

        an ordered factor corresponding to days, weekdays,
        months, quarters, or years of `x' for the respective
        function.

   SSeeee AAllssoo::

        `is.weekend', `is.holiday'

   EExxaammpplleess::

        dts <- dates("07/01/78") + trunc(50 * rnorm(30))
        plot(weekdays(dts))
        plot(months(dts))

