How can I get date in application run by node.js?

NodeJS (and newer browsers) have a nice shortcut to get the current time in milliseconds.

var timeInMss = Date.now()

Which has a performance boost compared with

var timeInMss = new Date().getTime()

Because you do not need to create a new object.

    var datetime = new Date();
    console.log(datetime.toISOString().slice(0,10));

You do that as you would in a browser:

    var datetime = new Date();
    console.log(datetime);

To create a new Date object in node.js, or JavaScript in general, just call it’s initializer

var d = new Date();

var d = new Date(dateString);

var d = new Date(jsonDate);

var d = new Date(year, month, day);

var d = new Date(year, month, day, hour, minute, second, millisecond);

Remember that Date objects can only be instantiated by calling Date or using it as a constructor; unlike other JavaScript object types, Date objects have no literal syntax