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I made a quiz about the JS Date parser is. It's very easy and you will score very high. jsdate.wtf

jsdate.wtfnew Date("wtf")How well do you know JavaScript's Date class?

Luke

@lukewarlow.dev

11 July 2025

Big Date are laughing at all of us.

Sam Rose

@samwho.dev

11 July 2025

Works with the first 3 letters of any month. Another one I didn’t include is that it’s very picking about opening parens being closed but doesn’t give a fuck about closing parens being scattered around.

Sam Rose

@samwho.dev

11 July 2025

The fact that “May 4” cares about your local timezone and “5.4” doesn’t is wonderful.

Luke

@lukewarlow.dev

I feel like there must be a hilarious story behind how all these rules came to be. Hilarious except for ruining an entire JS global that is...

11/7/25, 10:56 pm0 reposts1 like

Sam Rose

@samwho.dev

11 July 2025

From reading the code (which is well written and commented!) it looks to just be historical raisins. A valiant attempt to support a nascent and evolving web. It’s quite beautiful, sincerely.