A day the will live in infamy

On December 7 in the year:
1787 Delaware ratifies the Constitution and becomes the first of the United States

1842 New York Philharmonic plays first concert

1917 US becomes the 13th country to declare war on Austria in World War I

1934 Pilot Wiley Post discovers the jet stream

1941 Pearl Harbor in Hawaii is bombed by Japanese causing US to enter World War II

1972 Last US moon mission begins when Apollo 17 is launched at Cape Canaveral

St. Nicholas Day

On December 6th in the year:

1768 The first edition of the Encyclopedia Brittanica is published in Scotland
1833 Darwin departs Rio de la Plata on the Beagle

1849 Harriet Tubman escapes slavery in Maryland

1882 Atmosphere of Venus is discovered during transit
1922 First constitution of the Irish Free State comes into effect