# File lib/icalendar/conversions.rb, line 110
  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
  end