to_json

# File ext/json/lib/json/add/core.rb, line 77
  def to_json(*args)
    {
      JSON.create_id => self.class.name,
      'y' => year,
      'm' => month,
      'd' => day,
      'H' => hour,
      'M' => min,
      'S' => sec,
      'of' => offset.to_s,
      'sg' => start,
    }.to_json(*args)
  end