| Date | Event |
|---|---|
| May 01 1956 | Salk's Polio Vaccine Available To All |
| May 01 1956 | Japanese Doctor Discovers Minamata Disease |
| May 18 1956 | Lhotse First Ascent, Swiss Team |
| May 20 1956 | United States Drops First Hydrogen Bomb |
| May 24 1956 | Conclusion Of Sixth Buddhist Council |
| May 24 1956 | Switzerland Holds First Eurovision Song Contest |