Happy happy birthday!
I turned 40 in August, just before my 6mo birthday - and it was one of the most joyful, happy, best days of my life. I didn't do anything special, but my MWF meeting and dinner with my parents, and some pampering like getting my toes (and fingers! never do that) done...the love I got from people near and far felt so well deserved for the first birthday in a long time.
Enjoy your new decade and all that your life of sobriety will bring!