Simple if else function not returning as expected

Please could someone tell me where I’m going wrong here, I know it’s something simple I’m missing so forgive my ignorance but I can’t find the error.

let day = "Monday"

function alarmTime(day) {
  if (day == "Saturday") {
    return "Set alarm for 8:00am"
  } else if (day == "Friday") {
    return "Set alarm for 5:35am"
  } else if (day == "Sunday" || "Thursday") {
    return "Set alarm for 4:50am"
  } else {
    return "Set alarm for 7:00am"
  }
}

console.log(alarmTime(day));

if day is Mon, Tue, Wed then it returns 4:50am??? Why?? It should reach the final else statement and return 7:00am 🤦‍♀️ 🙏

>Solution :

Because day == "Sunday" || "Thursday" evaluates to Thursday. Since if ("Thursday") evaluates to true, it always enters in this block.

What you want to have is day == "Sunday" || day == "Thursday"