Does anyone know the exact day that the first Night of the Living Dummy came out??????

Because I want to to do something special for Slappy and Wally's 25th birthday. But everytime I look up the book's release date, it comes up as May 1993 and not the specific day. I will really appreciate it and when you comment down below, I will give you a hint on surprise for the special thing i am going to do for these two evil dummies :) :) :) :) :) :) :) - Slappy'sGirlfriend2598.