Moment.js - Parsing, validating, manipulating, and formatting dates

Features/Benefits:

• It supports a lot of international languages.
• Object mutability.
• Multiple internal properties like epoch shifting, retrieving native Date objects, etc.
• To use its parser correctly, there are some guidelines such as strict mode, date formats, forgiving mode, etc.

Use cases:

• To display the time in a published article.
• Communicating with people from across the world in their local language.

Source: momentjs.com

1. Install

npm install moment --save   # npm
yarn add moment             # Yarn
Install-Package Moment.js   # NuGet
spm install moment --save   # spm
meteor add momentjs:moment  # meteor
bower install moment --save # bower (deprecated)

2. Format Dates

moment().format('MMMM Do YYYY, h:mm:ss a'); // October 6th 2022, 12:21:57 pm
moment().format('dddd');                    // Thursday
moment().format("MMM Do YY");               // Oct 6th 22
moment().format('YYYY [escaped] YYYY');     // 2022 escaped 2022
moment().format();                          // 2022-10-06T12:21:57+07:00

3. Relative Time

moment("20111031", "YYYYMMDD").fromNow(); // 11 years ago
moment("20120620", "YYYYMMDD").fromNow(); // 10 years ago
moment().startOf('day').fromNow();        // 12 hours ago
moment().endOf('day').fromNow();          // in 12 hours
moment().startOf('hour').fromNow();       // 22 minutes ago

4. Calendar Time

moment().subtract(10, 'days').calendar(); // 09/26/2022
moment().subtract(6, 'days').calendar();  // Last Friday at 12:22 PM
moment().subtract(3, 'days').calendar();  // Last Monday at 12:22 PM
moment().subtract(1, 'days').calendar();  // Yesterday at 12:22 PM
moment().calendar();                      // Today at 12:22 PM
moment().add(1, 'days').calendar();       // Tomorrow at 12:22 PM
moment().add(3, 'days').calendar();       // Sunday at 12:22 PM
moment().add(10, 'days').calendar();      // 10/16/2022

5. Multiple Locale Support

moment.locale();         // en
moment().format('LT');   // 12:23 PM
moment().format('LTS');  // 12:23:25 PM
moment().format('L');    // 10/06/2022
moment().format('l');    // 10/6/2022
moment().format('LL');   // October 6, 2022
moment().format('ll');   // Oct 6, 2022
moment().format('LLL');  // October 6, 2022 12:23 PM
moment().format('lll');  // Oct 6, 2022 12:23 PM
moment().format('LLLL'); // Thursday, October 6, 2022 12:23 PM
moment().format('llll'); // Thu, Oct 6, 2022 12:23 PM