function getDayName(date = new Date(), locale = 'en-US') {
return date.toLocaleDateString(locale, {weekday: 'long'});
}
console.log(getDayName());
console.log(getDayName(new Date('2022-04-05')));
console.log(getDayName(new Date('2022-04-05'), 'et-EE')); // Estonian (Estonia)
console.log(getDayName(new Date('2022-04-05'), 'fr-FR')); // French (France)
console.log(getDayName(new Date('2022-04-05'), 'es-ES')); // Spanish (Spain)
/*
run:
Saturday
Tuesday
Teisipäev
mardi
martes
*/