function greet(name) {
  const time = new Date().getHours();
  let greeting;

  if (time < 12) {
    greeting = "Good morning";
  } else if (time < 18) {
    greeting = "Good afternoon";
  } else {
    greeting = "Good evening";
  }

  return `${greeting}, ${name}!`;
}

// Usage
const message = greet("World");
console.log(message);