gistfile1.rb

 def quoted_date(value) #:nodoc:
  result = super
  if value.acts_like?(:time) && value.respond_to?(:usec)
    result = "#{result}.#{sprintf("%06d", value.usec)}"
  end

  if value.year < 0
    result = result.sub(/^-/, "") + " BC"
  end
  result
end