daylight (TZInfo::TimezonePeriod)

    # File lib/icalendar/tzinfo.rb, line 85
            def daylight
                day = Icalendar::Daylight.new
                if dst?
                    day.timezone_name = abbreviation.to_s
                    day.timezone_offset_from = start_transition.offset_from
                    day.timezone_offset_to = start_transition.offset_to
                    day.dtstart = start_transition.dtstart
                    day.recurrence_rules = start_transition.rrule
                else
                    day.timezone_name = abbreviation.to_s.sub("ST","DT")
                    day.timezone_offset_from = end_transition.offset_from
                    day.timezone_offset_to = end_transition.offset_to
                    day.dtstart = end_transition.dtstart
                    day.recurrence_rules = end_transition.rrule
                end
                return day
            end