Date in Javascript

In Javascript, The Date object is used to work with dates and times. We can create a current date and time and a specific date and time using date objects.

Date object helps us to implement time-sensitive tasks like recurring tasks, cron jobs, scheduling tasks, calculating date and time differences, or specifying the current date and time.

It provides methods for creating, manipulating, and formatting dates.

Here are the examples of how we can use Date Module in Javascript:

Creating a Date Object:

We can create a Date object in several ways.

Using the new keyword:

let currentDate = new Date();

Using a specific date and time:

let specificDate = new Date("2023-03-03T23:30:00");

Using individual date components:

let dateComponents = new Date(2023, 3, 3, 23, 30, 0); // Months are zero-based (0-11)

Extracting Date Information using Instance different methods:

We can retrieve various info of a Date object using its methods.

Example:

let date = new Date();

console.log(date.getFullYear()); // 2023

console.log(date.getMonth());    // 3 (Months are zero-based)

console.log(date.getDate());     // 3

console.log(date.getDay());      // 5 (Day of the week: 0-Sunday, 1-Monday, ..., 6-Saturday)

hour, minute and second method:

console.log(date.getHours());    // Current hour

console.log(date.getMinutes());  // Current minute

console.log(date.getSeconds());  // Current second

Formatting Dates:

JavaScript doesn't have built-in formatting methods for dates, but we can create a custom function or use external libraries like Intl.DateTimeFormat or third-party libraries like moment.js for more advanced formatting.

Example:

let date = new Date();

// Example using Intl.DateTimeFormat
let formattedDate = new Intl.DateTimeFormat('en-US').format(date);

console.log(formattedDate); // "3/3/2023"

// Example using toLocaleString
let formattedDate2 = date.toLocaleString('en-US', { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' });

console.log(formattedDate2); // "Friday, March 3, 2023"

Performing Date Arithmetic:

We can perform arithmetic operations on Date objects to calculate time differences or add/subtract time.

Example:

let currentDate = new Date();
let futureDate = new Date(currentDate.getTime() + 5 * 24 * 60 * 60 * 1000); // Adding 5 days

Working with Timestamps:

Timestamps represent the number of milliseconds since January 1, 1970

Example:

let timestamp = Date.now();
console.log(timestamp);

<-- JS Math

JS Objects -->

Date in Javascript

In Javascript, The Date object is used to work with dates and times. We can create a current date and time and a specific date and time using date objects.

Date object helps us to implement time-sensitive tasks like recurring tasks, cron jobs, scheduling tasks, calculating date and time differences, or specifying the current date and time.

It provides methods for creating, manipulating, and formatting dates.

Here are the examples of how we can use Date Module in Javascript:

Creating a Date Object:

We can create a Date object in several ways.

Using the new keyword:

let currentDate = new Date();

Using a specific date and time:

let specificDate = new Date("2023-03-03T23:30:00");

Using individual date components:

let dateComponents = new Date(2023, 3, 3, 23, 30, 0); // Months are zero-based (0-11)

Extracting Date Information using Instance different methods:

We can retrieve various info of a Date object using its methods.

Example:

let date = new Date();

console.log(date.getFullYear()); // 2023

console.log(date.getMonth());    // 3 (Months are zero-based)

console.log(date.getDate());     // 3

console.log(date.getDay());      // 5 (Day of the week: 0-Sunday, 1-Monday, ..., 6-Saturday)

hour, minute and second method:

console.log(date.getHours());    // Current hour

console.log(date.getMinutes());  // Current minute

console.log(date.getSeconds());  // Current second

Formatting Dates:

Example:

let date = new Date();

// Example using Intl.DateTimeFormat
let formattedDate = new Intl.DateTimeFormat('en-US').format(date);

console.log(formattedDate); // "3/3/2023"

// Example using toLocaleString
let formattedDate2 = date.toLocaleString('en-US', { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' });

console.log(formattedDate2); // "Friday, March 3, 2023"

Performing Date Arithmetic:

We can perform arithmetic operations on Date objects to calculate time differences or add/subtract time.

Example:

let currentDate = new Date();
let futureDate = new Date(currentDate.getTime() + 5 * 24 * 60 * 60 * 1000); // Adding 5 days

Working with Timestamps:

Timestamps represent the number of milliseconds since January 1, 1970

Example:

let timestamp = Date.now();
console.log(timestamp);

<-- JS Math

JS Objects -->