| 1938 1939 1940 1941 1942 1943 1944 |
| 1910s 1920s 1930s 1940s 1950s 1960s 1970s |
| distant past - 20th century - 21st century |
Events
- 21 October
- All-Star Comics #8, with the first appearance and origin of the comic-book character Wonder Woman, arrives on newsstands in the United States of America. As a cultural flashpoint of the era, and an inspiration to readers during World War II, this event -- across multiple timelines -- is among those monitored by the Federation Department of Temporal Investigations. (Star Trek: Shadowstar Station: "Saviors")
- 07 December
- The Japanese attack the U.S. military base at Pearl Harbor, Hawaii, by surprise, bringing the United States into World War II the next day. (TNG: "The Enemy"; DS9: "Far Beyond The Stars")