The date-and-time.Date.format() is a minimalist collection of functions for manipulating JS date and time module which is used to format the date according to a certain pattern. 

Required Module: Install the module by npm or used it locally.

• By using npm.

npm install date-and-time --save

• By using CDN link.

<script src="/https/www.geeksforgeeks.org/path/to/date-and-time.min.js"></script>

Syntax:

format(dateObj, formatString[, utc])

Parameters: This method takes the following arguments as parameters:

• dateObj: It is the object of the date.
• formatString: It is the new string format in which date will be shown.

Return Value: This method returns formatted date and time.

Example 1:

// Node.js program to demonstrate the  
// Date.format() method

// Importing module
const date = require('date-and-time')

// Creating object of current date and time 
// by using Date() 
const now  =  new Date();

// Formatting the date and time
// by using date.format() method
const value = date.format(now,'YYYY/MM/DD HH:mm:ss');

// Display the result
console.log("current date and time : " + value)

Run the index.js file using the following command:

node index.js

Output:

current date and time : 2021/03/07 12:13:46

Example 2:

// Node.js program to demonstrate the  
// Date.format() method

// Importing module
const date = require('date-and-time')

// Formatting the date and time
// by using date.format() method
const value = date.format((new Date('December 17, 1995 03:24:00')),
  'YYYY/MM/DD HH:mm:ss');

// Display the result
console.log("date and time : " + value)

Run the index.js file using the following command:

node index.js

Output:

date and time : 1995/12/17 03:24:00

Reference: https://github.com/knowledgecode/date-and-time