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