When BGR announced an October 21st release date for the Nokia Lumia 920 we were rather sceptical, given the strong rumour that Microsoft was only announcing Windows Phone 8 on the 29th October.

Now WPCentral is claiming a reliable source, who previously gave them accurate Windows Phone Mango launch dates, have shown them recent documentation confirming the launch of the Nokia Lumia 920 on the 21st October.

The 21st is a Sunday, which seems to be a favourite Windows Phone launch day for AT&T and Microsoft, but which often sees stores closed on launch.

Do our readers give the rumour much credence? Let us know below.