# File lib/facet/time/to_s.rb, line 3
  def to_s( format = nil )
    case format
    when :db
      strftime("%Y-%m-%d %H:%M:%S")
    when :short
      strftime("%e %b %H:%M").strip
    when :long
      strftime("%B %e, %Y %H:%M").strip
    else
      stamp
    end
  end