--- Time.gm(year[, mon[, day[, hour[, min[, sec[, usec]]]]]])
--- Time.gm(sec, min, hour, mday, mon, year, wday, yday, isdst, zone)
--- Time.utc(year[, mon[, day[, hour[, min[, sec[, usec]]]]]])
--- Time.utc(sec, min, hour, mday, mon, year, wday, yday, isdst, zone)

    ǻꤷ Time ֥Ȥ֤ޤ 2 
    ʹߤϾάǽǡάͤϤΰȤǾ
    Ǥ

    ͤդˤʸǤޤ

        p Time.gm *"2002-03-17".split("-")
        # => Sun Mar 17 00:00:00 UTC 2002

    mon  1(1) 12(12)ϰϤޤʸǤѸ
    η̾("Jan", "Feb", ... ʤɤξά̾ʸ羮̵)Ǥ
    ޤ

    οTime#to_a [Time/to_a] Ʊ(ä
    ƬǤ)νᤷޤ
    ηΰ wday, yday, zone ˻ꤷ̵ͤ
    뤵ޤ
    isdst ˤϲƻ(Daylight Saving Time (Summer Time))뤫
    򿿵ͤǻꤷޤ

