# File lib/icalendar/conversions.rb, line 128
  def to_ical(utc = false)
    s = ""

    # Double digit hour
    s << "0" unless self.hour > 9 
    s << self.hour.to_s
    
    # Double digit minute
    s << "0" unless self.min > 9 
    s << self.min.to_s
    
    # Double digit second
    s << "0" unless self.sec > 9 
    s << self.sec.to_s

    # UTC time gets a Z suffix
    if utc
      s << "Z"
    end

    s
  end