By default, Day.js comes with English locale only.
If you need other locales, you can load them on demand.
Once you load a locale, it becomes the active locale. To change active locales, simply call
dayjs.locale with the key of a loaded locale to change global locale.
Changing the global locale doesn't affect existing instances.
dayjs.locale('de') // use loaded locale globally dayjs.locale('en') // switch back to default English locale globally