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| 1634 | - | Maryland founded as a Catholic colony |
| 1655 | - | Christiaan Huygens discovers Titan - (Saturn\s largest satelite) |
| 1753 | - | Annunciation Day |
| 1821 | - | Greece gains independence from Turkey (National Day) |
| 1857 | - | Frederick Laggenheim takes the 1st photograph of a solar eclipse |
| 1913 | - | Great Dayton Flood |
| 1920 | - | Greek Independence Day |
| 1951 | - | E Purcell & EM Ewen detect 21-cm radiation at Harvard physics lab |
| 1954 | - | RCA manufactures 1st COLOR TV set |
| 1955 | - | E Germany granted full sovereignty by occupying power - USSR |
| 1960 | - | 1st guided missile launched from nuclear powered sub (Halibut) |
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