my_time = Time.local( 20, 15, 1, 30, "jan", 2007, 2, 30, false, "MST") # => Tue Jan 30 01:15:20 -0700 2007 # arguments are seconds, minutes, hour, day, month, year, day of the week, day of the year, is-it-daylight-savings-time?, and timezone.