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Moment.js

lastmod 2024-01-26created 2018-08-3112 edits

WARNING

Moment is considered a legacy project in maintenance mode. For time-related libraries, use Luxon, Day.js, date-fns, js-Joda, or JavaScript:Date, JavaScript:Temporal, or implement it yourself. For details, see here. For a Korean-language write-up, see Why you shouldn't use moment.js.

Parse, validate, manipulate, and display dates and times in JavaScript.

Moment Timezone

Timezone library for Moment. See that page for details.

How to install 

npm install moment

Printing after timezone conversion 

import moment from 'moment-timezone';

export function iso8601ToLocal(text: string) {
    if (text) {
        return moment(text).tz(moment.tz.guess()).format('LLLL');
    } else {
        return '';
    }
}

export function iso8601ToLocalDate(text?: string) {
    if (text) {
        return moment(text).tz(moment.tz.guess()).format('YYYY-MM-DD');
    } else {
        return '';
    }
}

Changing the locale 

moment.locale('ko');

Examples

Format Dates 

moment().format('MMMM Do YYYY, h:mm:ss a'); // October 8th 2021, 9:55:17 am
moment().format('dddd');                    // Friday
moment().format("MMM Do YY");               // Oct 8th 21
moment().format('YYYY [escaped] YYYY');     // 2021 escaped 2021
moment().format();                          // 2021-10-08T09:55:17+09:00

Relative Time 

moment("20111031", "YYYYMMDD").fromNow(); // 10 years ago
moment("20120620", "YYYYMMDD").fromNow(); // 9 years ago
moment().startOf('day').fromNow();        // 10 hours ago
moment().endOf('day').fromNow();          // in 14 hours
moment().startOf('hour').fromNow();       // an hour ago

Calendar Time 

moment().subtract(10, 'days').calendar(); // 09/28/2021
moment().subtract(6, 'days').calendar();  // Last Saturday at 9:55 AM
moment().subtract(3, 'days').calendar();  // Last Tuesday at 9:55 AM
moment().subtract(1, 'days').calendar();  // Yesterday at 9:55 AM
moment().calendar();                      // Today at 9:55 AM
moment().add(1, 'days').calendar();       // Tomorrow at 9:55 AM
moment().add(3, 'days').calendar();       // Monday at 9:55 AM
moment().add(10, 'days').calendar();      // 10/18/2021

Multiple Locale Support 

moment.locale();         // en
moment().format('LT');   // 9:55 AM
moment().format('LTS');  // 9:55:17 AM
moment().format('L');    // 10/08/2021
moment().format('l');    // 10/8/2021
moment().format('LL');   // October 8, 2021
moment().format('ll');   // Oct 8, 2021
moment().format('LLL');  // October 8, 2021 9:55 AM
moment().format('lll');  // Oct 8, 2021 9:55 AM
moment().format('LLLL'); // Friday, October 8, 2021 9:55 AM
moment().format('llll'); // Fri, Oct 8, 2021 9:55 AM

See also

Favorite site

author Zer0 sitemap