Snippets

Formatting dates in Polish

A readable date with an explicit time zone in JavaScript.

Sep 29, 2026 · Reading time: 1 min

Intl.DateTimeFormat formats dates without additional libraries.

Code

const formatDate = new Intl.DateTimeFormat('pl-PL', {
  dateStyle: 'long',
  timeZone: 'Europe/Warsaw',
});

formatDate.format(new Date('2026-09-29T12:00:00Z'));
// "29 września 2026"

When to use it

An explicit time zone produces consistent results regardless of device settings. Pass the input as an ISO date with a time zone, such as the Z suffix for UTC. This example intentionally produces a Polish date; use en-US as the locale for English output.

JavascriptDates