Mongomatic::Plugins::Timestamps matic_timestamp is a plugin for Mongomatic to automatically add created_at and updated_at Usage require 'matic_timestamp' class Monkey < Mongomatic::Base include Mongomatic::Plugins::Timestamps end m = Monkey.new m.insert Monkey.find_one.created_at # Time object m.update Monkey.find_one.updated_at # More recent Time object