# File lib/ri_cal/fast_date_time.rb, line 72
    def <=> (other)
      if FastDateTime === other
        [date, secs_since_bod] <=> [other.date, other.secs_since_bod]
      else
        [year, month, day, hour, min, sec] <=> [other.year, other.month, other.day, other.hour, other.min, other.sec]
      end
    end