Go to the Apple in the top left corner - then go to "About This Mac" - then hit the "More Info..." tab - it should then tell you what year MBP. Let us know.
OR
Go to the Apple in the top left corner - then go to "About This Mac" - then hit the "More Info..." tab - then hit "System Report" tab - Then look for Model Identifier - (mine is MacBook Pro 8,2) tell us your model identifier. Let us know.