Marriott giveth and Marriott taketh away. I will miss the free birthday elite night too. (It's always a stretch for me to reach gold status. I'm only platinum this year due to having taken the platinum challenge. The birthday night has been a much appreciated little nudge/boost/helping hand up.)
My birthday was in January and I did receive the birthday promo email this year (2015). However when I clicked the link in the email I received an error that indicated I had already received an elite credit for my birthday when I had not. I contacted Marriott Rewards Customer service and was then given a birthday elite credit for this year.