Mean Temp 12.3°C 54.14°F at Taegu
April 18, 1950 (Tuesday)
- U.S. Postmaster General Jesse M. Donaldson issued cost-cutting measures, bringing an end to the long time practice of letter carriers making two deliveries per day, and limiting the carriers to an 8-hour day.
- The Avro Canada C102 Jetliner became the first jet airplane to transport airmail in North America, flying from Toronto to New York City in less than an hour, and half the time of a propeller driven airplane.
- Billy Martin, controversial as a baseball player and later as a baseball manager, made his Major League Baseball debut, getting hits in both of his at bats, and scoring a run for the New York Yankees in a 15–10 win over the Boston Red Sox.
- Vin Scully made his first broadcast as an announcer for the Brooklyn Dodgers. In 2015, Scully entered his 66th consecutive season as the team's announcer. Retiring in 2016.