The milestone will be marked as the seven times Formula One world champion's manager revealed the pressure Schumacher's wife Corinna is under as her husband remains in a critical condition in hospital in Grenoble, France, following Sunday's crash.
Sabine Kehm said: "Corinna, of course, is really not good. But she is trying to be strong for Michael, to give him support and not allow negative thoughts to reach him."
Ferrari, for whom Schumacher won five of his titles and most of his 91 races, is planning a show of support outside the University Hospital of Grenoble to mark his birthday.
Ms Kehm said he was in a stable condition but refused to speculate further on his prognosis. He is in an induced coma after smashing his head on a rock in the Alpine resort of Meribel.
Doctors said earlier in the week there had been a slight improvement in his condition, with surgery carried out to remove a dangerous haematoma on his brain.
In a message on his official website, Schumacher's family said: "We all know he is a fighter and will not give up."