test.js

function currentlyOpen () {
  var currentDateTime = new Date(); // current time
  var hours = currentDateTime.getHours();
  var mins = currentDateTime.getMinutes();
  var day = currentDateTime.getDay();

  return day >= 1 &&
        day <= 5 &&
        hours >= 9 &&
        (hours < 17 || hours === 17 && mins <= 30);
}

function hours (agent) {
    if (currentlyOpen()) {
      agent.add(`We're open now! We close at 5:30pm today.`);
    } else {
      agent.add(`We're currently closed, but we open every weekday at 9am!`);
    }
  }