In 1931 – Jacob Schick began marketing his second electric razor. His first hadn’t caught on because of the bulky motor. This time the more practical design became a hit.
In 1965 – The Voskhod 2 launched and on the second orbit Cosmonaut Aleksei Leonov left the capsule (on purpose) for 12 minutes, becoming the first person to walk in space.
In 1987 – Thousands of physicists crowded a ballroom at the New York Hilton at the meeting of the American Physical society to hear speakers talk on high-temperature superconductivity. The session started in the evening and ran until 3:15 AM earning the nickname “Woodstock of Physics.”