A number. If the Date object represents a valid date, an integer number corresponding to the day of the week for the given date, according to universal time: 0 for Sunday, 1 for Monday, 2 for Tuesday, and so on. Otherwise, NaN if the Date object doesn't represent a valid date.

The following example assigns the weekday portion of the current date to the variable weekday.

const today = new Date();
const weekday = today.getUTCDay();

• Date.prototype.getUTCDate()
• Date.prototype.getDay()
• Date.prototype.setUTCDate()