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Locales

Locales customize the language-specific strings used in date formatting and parsing — month names, day-of-week names, and AM/PM indicators. By default, the library uses English (en). To use another language, import the corresponding locale module and pass it as the locale option.

import { format, parse } from 'date-and-time';
import es from 'date-and-time/locales/es';


const date = new Date('2025-08-23T12:00:00');


format(date, 'MMMM D, YYYY', { locale: es });
// => agosto 23, 2025


format(date, 'ddd, D MMM', { locale: es });
// => sáb, 23 ago

Supported Locales

The following 41 locales are available:

ar (Arabic)

import ar from 'date-and-time/locales/ar';

az (Azerbaijani)

import az from 'date-and-time/locales/az';

bn (Bengali)

import bn from 'date-and-time/locales/bn';

cs (Czech)

import cs from 'date-and-time/locales/cs';

da (Danish)

import da from 'date-and-time/locales/da';

de (German)

import de from 'date-and-time/locales/de';

el (Greek)

import el from 'date-and-time/locales/el';

en (English)

import en from 'date-and-time/locales/en';

es (Spanish)

import es from 'date-and-time/locales/es';

fa (Persian)

import fa from 'date-and-time/locales/fa';

fi (Finnish)

import fi from 'date-and-time/locales/fi';

fr (French)

import fr from 'date-and-time/locales/fr';

he (Hebrew)

import he from 'date-and-time/locales/he';

hi (Hindi)

import hi from 'date-and-time/locales/hi';

hu (Hungarian)

import hu from 'date-and-time/locales/hu';

id (Indonesian)

import id from 'date-and-time/locales/id';

it (Italian)

import it from 'date-and-time/locales/it';

ja (Japanese)

import ja from 'date-and-time/locales/ja';

ko (Korean)

import ko from 'date-and-time/locales/ko';

ms (Malay)

import ms from 'date-and-time/locales/ms';

my (Burmese)

import my from 'date-and-time/locales/my';

nl (Dutch)

import nl from 'date-and-time/locales/nl';

no (Norwegian)

import no from 'date-and-time/locales/no';

pl (Polish)

import pl from 'date-and-time/locales/pl';

pt-BR (Brazilian Portuguese)

import ptBR from 'date-and-time/locales/pt-BR';

pt-PT (European Portuguese)

import ptPT from 'date-and-time/locales/pt-PT';

ro (Romanian)

import ro from 'date-and-time/locales/ro';

ru (Russian)

import ru from 'date-and-time/locales/ru';

rw (Kinyarwanda)

import rw from 'date-and-time/locales/rw';

sr-Cyrl (Serbian Cyrillic)

import srCyrl from 'date-and-time/locales/sr-Cyrl';

sr-Latn (Serbian Latin)

import srLatn from 'date-and-time/locales/sr-Latn';

sv (Swedish)

import sv from 'date-and-time/locales/sv';

ta (Tamil)

import ta from 'date-and-time/locales/ta';

th (Thai)

import th from 'date-and-time/locales/th';

tr (Turkish)

import tr from 'date-and-time/locales/tr';

uk (Ukrainian)

import uk from 'date-and-time/locales/uk';

uz-Cyrl (Uzbek Cyrillic)

import uzCyrl from 'date-and-time/locales/uz-Cyrl';

uz-Latn (Uzbek Latin)

import uzLatn from 'date-and-time/locales/uz-Latn';

vi (Vietnamese)

import vi from 'date-and-time/locales/vi';

zh-Hans (Simplified Chinese)

import zhHans from 'date-and-time/locales/zh-Hans';

zh-Hant (Traditional Chinese)

import zhHant from 'date-and-time/locales/zh-Hant';