How to get the day of the week from the day number in JavaScript?

To get the day of the week from the day number in JavaScript, we call the toLocaleString method.

For instance, we write

const weekday = new Date().toLocaleString("en-us", { weekday: "long" });

to call toLocaleString on a date object with the locale and an object specifying the date string returned.

We set weekday to 'long' to return the day of the week.