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# File 'lib/icalendar/tzinfo.rb', line 86
def ical_timezone(date, dst = Timezone.default_dst)
period = period_for_local(date, dst)
timezone = Icalendar::Timezone.new
timezone.tzid = identifier
if period.start_transition.nil?
timezone.add_component period.single
elsif period.end_transition.nil?
timezone.add_component period.dst? ? period.daylight : period.standard
else
timezone.add_component period.daylight
timezone.add_component period.standard
end
timezone
end
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