Hershey
So unlike World Chocolate Day, there need be no confusion about the date. Hershey was simply born on that day (September 13). Only is there enough reason then to link the day to his date of birth again? That is then another question. There are plenty of people who have been important when it comes to the history of chocolate. They would then all deserve a day. Producers and inventors of chocolate were plenty. So with International Chocolate Day, we are kind of stuck with Hershey’s legacy. There is no way around that.
Food Days
Just because chocolate is so popular, we can’t possibly set special days for everyone important. That would take us a while. Besides, Americans have already made sure that there are so many days when chocolate plays a secondary role. Check out this Wikipedia page with the food days.