I think Upcoming Birthday app doesnt work. I installed the app first. But app didnt appeared on dasboard or profil pages' widgets after installation. But i remember that the app appeared one of old easysocial version i installed. So there must be something missing or an error for current easysocial.
Also for testing purpose i set as 06/01/2014 one of my demo users' birthdate. I added my demo user as a friend also (at first). But i couldnt see anything about upcoming birtday
And note; i tried 07/01/2014 and 08/01/2014 for birthdate