How do I change a global variable from inside an EventListener function with JavaScript? - scope

Question

I'm using getDay(); to display what's for lunch the day the visitor lands on my site.
However, I'd also like to let the user use a dropdown menu to see what's for lunch any day they'd like. I thought I could accomplish this with the function inside the EventListener at the bottom of the code but it's not working.
Some help would be deeply appreciated!
const daysOfWeek = ["---Välj dag---", "Måndag", "Tisdag", "Onsdag", "Torsdag", "Fredag", "Lördag", "Söndag"];
const h1 = document.createElement("h1");
h1.innerText ="Lunchrestaurangens meny";
document.body.appendChild(h1);
const p = document.createElement("p");
document.body.appendChild(p);
const p2 = document.createElement("p");
document.body.appendChild(p2);
const d = new Date();
let day = d.getDay();
switch (day) {
case 1:
p.innerText = "Dagens rätt måndag: Korvstroganoff";
break;
case 2:
p.innerText = "Dagens rätt tisdag: Raggmunkar med fläsk";
break;
case 3:
p.innerText = "Dagens rätt onsdag: Stekt strömming med skirat smör och potatismos";
break;
case 4:
p.innerText = "Dagens rätt torsdag: Ärtsoppa";
break;
case 5:
p.innerText = "Dagens rätt fredag: Tacos";
break;
case 6:
p.innerText = "På lördagar håller restaurangen stängt.";
break;
case 7:
p.innerText = "På söndagar håller restaurangen stängt.";
break;
}
p2.innerText = "Vill du se vad det blir för lunch en annan dag? Välj veckodag nedan!"
const chooseDay = document.createElement("select");
chooseDay.setAttribute("id", "chooseDay");
document.body.appendChild(chooseDay);
for (i = 0; i < daysOfWeek.length; i++) {
let days = document.createElement("option");
days.setAttribute("id", [i]);
document.getElementById("chooseDay").appendChild(days);
days.innerHTML = daysOfWeek[i];
}
chooseDay.addEventListener("change", () => {
let newDay = daysOfWeek.indexOf(chooseDay.value);
day = newDay;
});
I tried updating the day variable which would then be run by the switch statement with the following code:
chooseDay.addEventListener("change", () => {
let newDay = daysOfWeek.indexOf(chooseDay.value);
day = newDay;
But nothing happens.