1776191 - Invalid Date when handling Date objects

Status: RESOLVED DUPLICATE of bug 1557650

(Core :: JavaScript Engine, defect, P3)

Description

[piotrsuplat]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0

Steps to reproduce:

Try converting UTC date to a specific timezone. Try the below code in jsfiddle or console:

const date = '2022-06-24 07:00:00';
const event = new Date(date + ' UTC');
console.log(event.toLocaleString('sv-SE', { timeZone: 'Europe/Stockholm' }));

Actual results:

I get "Invalid Date"

Expected results:

I was expecting to see "2022-06-24 09:00:00"
+1 hour for timezone difference
+1 hour for daylight saving time

The above code works perfectly fine in competing browser (Chromium-based, Safari)

Comment 1

[Vinny Diehl]

This was fixed in bug 1557650.