JavaScript Date constructor cannot handle RFC 822 format

I am displaying an RSS feed from a QtQuick application. The date returned by the XML looks as follows

Sun, 04 May 2014 09:54:55 -0000

Trying to create a Date object out of this using

var d = new Date("Sun, 04 May 2014 09:54:55 -0000")

results in Invalid Date.

Doing the same in eg. Google Chrome's developer console works just fine.