Microsoft JSON date retardify & unretardify

gistfile1.txt

class Time 
  def to_json(*) 
    "\/Date(#{self.strftime("%s000%z")})\/" 
  end 

  def self.from_json(jsonDate)
    /Date\((?<msecs>\d+)(?<offset>-?\d+)\)/ =~ jsonDate
    return nil if msecs.nil?
    Time.at(msecs.to_i / 1000)
  end
end