After a bit of deliberation, I have decided to feature two stamps in this A Stamp A Day entry. Since 2012, the first Saturday in November (November 3 in 2018) has been marked as National Bison Day in the United States. The day is a commemoration of the ecological, cultural, historical and economic contribution of the American bison (also commonly known as the American buffalo) … Continue reading National Bison Day & Mariner 10 Launch