fori,
https://developer.mozilla.org/ru/doc...DateTimeFormat
<!doctype html>
<html lang="ru">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script>
let Data = new Date();
let formatter = new Intl.DateTimeFormat("ru", {
weekday: 'long',
month: "long",
day: "numeric",
});
document.write(formatter.format(Data))
</script>
</body>
</html>