# File lib/ice_cube/builders/ical_builder.rb, line 38
    def self.ical_format(time, force_utc)
      time = time.dup.utc if force_utc
      if time.utc?
        ":#{IceCube::I18n.l(time, format: '%Y%m%dT%H%M%SZ')}" # utc time
      else
        ";TZID=#{IceCube::I18n.l(time, format: '%Z:%Y%m%dT%H%M%S')}" # local time specified
      end
    end