Turning the big three-oh this year? You’re not alone – Casablanca in Harvard Square is celebrating their thirtieth birthday, too and they have a little treat in store for diners who were also born in 1978. If your birthday falls any time between now and the end of the year, bring your appetite and proper identification to the venerable Harvard Square eatery on your birthday and your entree is on the house. Take your pick from among dishes on Camillo Diaz’s Mediterranean and Middle Eastern-inspired menu and see what’s kept diners coming back for three decades. Make your reservations by calling 617.876.0999.