On This Day in History - June 23 |
| Discover today's historical events and the facts. Listed here the time line of events that happened on this day in history |
| Click on the date from the below calendar to know the historical events happened on that particular day. |
| What Happened On This Day In History - June 23 |
1938 June 23
1938-06-23
Marineland opens in Florida-1st aquarium
1944 June 23
1944-06-23
Thomas Mann becomes a US citizen
1974 June 23
1974-06-23
1st extraterrestrial message sent from Earth into space
1980 June 23
1980-06-23
1st solar-powered coast-to-coast two-way radio conversation
