countdown.rb

#!/usr/bin/env ruby
#

require 'active_support'
require 'active_support/core_ext'

quitting_time = Time.parse('2016-11-11T17:00:00Z')

quitting_seconds =  (quitting_time - Time.now).to_i

if quitting_seconds > 0
  puts quitting_seconds
else
  puts "None! You're done!"
end