Creating a New Date Object in JavaScript

JavaScript enables us to work with dates and times via its built-in Date object. With it, we can create, manipulate and retrieve dates and times in a versatile manner. The correct syntax for creating a new Date object in JavaScript appears as follows:

var myDate = new Date();

This line of code initializes a variable, myDate, and assigns it a new Date object representing the current date and time.

The Date() Constructor

The Date() constructor is utilized to create and initialize a Date object. It can be used with or without the new keyword - but usually, it's used with new. If used without new, it returns a string representing the current date and time, instead of a Date object.

The Date object automatically stores the date and time data in a format known as Coordinated Universal Time (UTC), an atomic time scale based on International Atomic Time with leap seconds added at irregular intervals to compensate for earth's slowing rotation.

Usage of new Date()

var myDate = new Date();
console.log(myDate);
// logs the current date and time

In this example, a new date instance is created and the current date and time are logged into the console.

An Important Note on Incorrect Methods

Let's clarify the incorrect options:

var myDate = Date.now(); While the Date.now() method does exist in JavaScript, it returns the number of milliseconds elapsed since January 1, 1970, 00:00:00 UTC, not a Date object.

var myDate = createNewDate(); and var myDate = new DateObject(); are not valid JavaScript methods or objects. They will result in a JavaScript error because neither the createNewDate() function nor the DateObject() constructor exist in the JavaScript language.

Additional Uses of the Date Object

JavaScript's Date object is rich with methods for manipulating and retrieving dates and times, including functions to get and set specific date parts (day, month, year, hour, second, etc.), to compare dates, to calculate elapsed time, and much more.

This basic usage is only the starting point - you're encouraged to delve into JavaScript's Date object to discover all its abilities.