text: require('proof')(5, function (assert) {
      var tz = require('timezone')(require('timezone/en_US'))
  
      // en_US date representation
      assert(tz('2000-09-03', '%x', 'en_US'), '09/03/2000', 'date format')
  
      // en_US time representation
      assert(tz('2000-09-03 08:05:04', '%X', 'en_US'), '08:05:04 AM', 'long time format morning')
      assert(tz('2000-09-03 23:05:04', '%X', 'en_US'), '11:05:04 PM', 'long time format evening')
  
      // en_US date time representation
      assert(tz('2000-09-03 08:05:04', '%c', 'en_US'), 'Sun 03 Sep 2000 08:05:04 AM UTC', 'long date format morning')
      assert(tz('2000-09-03 23:05:04', '%c', 'en_US'), 'Sun 03 Sep 2000 11:05:04 PM UTC', 'long date format evening')
  })
  