[LeaveMe]

Here are previous versions release date.

SA-MP 0.4 ?? ?? ?
SA-MP 0.3x 31 Jan 2013
SA-MP 0.3c 29 Dec 2010
SA-MP 0.3b 21 Aug 2010
SA-MP 0.3a 17 Oct 2009
SA-MP 0.2X 20 Nov 2008
SA-MP 0.2.2 R3 20 Jun 2008
SA-MP 0.2.2 R2 30/31 Aug 2007
SA-MP 0.2.2 29 Aug 2007
SA-MP 0.2.1 R2 25 Jul 2007
SA-MP 0.2.1 24 Jun 2007
SA-MP 0.2 20 Jun 2007
SA-MP 0.1b R2 17 Feb 2007
SA-MP 0.1b 21 May 2006
SA-MP 0.1 10 May 2006


Now guess SA-MP 0.4 release date!
My guess is around 25-30 Nov 2013