# File lib/icalendar/conversions.rb, line 56
  def to_ical(utc = false)
    s = ""
    
    # 4 digit year
    s << self.year.to_s
    
    # Double digit month
    s << "0" unless self.month > 9 
    s << self.month.to_s
    
    # Double digit day
    s << "0" unless self.day > 9 
    s << self.day.to_s

    s << "T"
        
    # 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