JavaScript Date Objects

The JavaScript Date object is designed to work with dates and times, providing a comprehensive set of methods for creating, manipulating, and formatting date and time values. It represents a point in time, with precision down to milliseconds, and can be utilized to perform various operations on dates.

Creating Date Objects:

To create a new Date object, you can use the new Date() constructor. If no arguments are provided, it creates a Date object representing the current date and time. Alternatively, you can pass specific values for the year, month, day, hour, minute, second, and millisecond.

// Creating a Date object with the current date and time
let currentDate = new Date();

// Creating a Date object with specific values
let customDate = new Date(2024, 0, 9, 12, 30, 0, 0); // Year, Month (0-indexed), Day, Hour, Minute, Second, Millisecond

In the below PDF we discuss about Javascript Date Objects in detail in simple language, Hope this will help in better understanding.

Common Date Object Methods:

getMonth(): Returns the month (0-indexed) of the Date object.
getDate(): Returns the day of the month (1-31) of the Date object.
getFullYear(): Returns the year of the Date object.
getHours(), getMinutes(),
getSeconds(): Return the hour, minute, and second of the Date object, respectively.
getTime(): Returns the timestamp (milliseconds since January 1, 1970) of the Date object.
toDateString(), toTimeString(),
toLocaleDateString(): Convert the Date object to human-readable date and time strings.
For Examples:

let month = customDate.getMonth(); // Returns 0 for January

let day = customDate.getDate();

let year = customDate.getFullYear();

let hours = customDate.getHours();

let minutes = customDate.getMinutes();

let seconds = customDate.getSeconds();

let timestamp = customDate.getTime();

Manipulating Dates:

The Date object allows you to easily manipulate dates using various methods. For example, you can add or subtract days, months, or years.

customDate.setDate(customDate.getDate() + 7); // Add 7 days
customDate.setMonth(customDate.getMonth() + 1); // Add 1 month
customDate.setFullYear(customDate.getFullYear() - 1); // Subtract 1 year

You can iterate through the Set elements using the for…of loop or forEach() method. The elements are accessed in the insertion order. For example,

const set = new Set([1, 2, 3]);

// looping through Set
for (let i of set) {
console.log(i);
}

Output:

1
2
3