| Date | Weekday | Event |
|---|
| October 1, 331 | Thursday | BC Alexander of Macedon defeats Persian army at Gaugamela |
|
| October 1, 1837 | Sunday | Treaty with Winnebago Indians |
| October 1, 1847 | Friday | Maria Mitchell discovers a non-naked-eye comet |
| October 1, 1851 | Wednesday | 1st Hawaiian stamps issued |
| October 1, 1869 | Friday | 1st postcards are issued in Vienna |
| October 1, 1896 | Thursday | Yosemite becomes a National Park |
| October 1, 1898 | Saturday | Henry Huntington buys the LA Railway |
| October 1, 1903 | Thursday | 1st Baseball World Series |
| October 1, 1908 | Thursday | Jack Chesbro's final Yankee victory beats Walter Johnson 2-1 |
| October 1, 1908 | Thursday | Henry Ford introduces the Model T car |
| October 1, 1912 | Tuesday | Yanks lose game #100 enroute to a 50-102 season |
| October 1, 1921 | Saturday | Yanks win their 1st pennant |
| October 1, 1932 | Saturday | Babe Ruth's famous homerun called off of Cubs Charlie Root |
| October 1, 1938 | Saturday | Germany annexes Sudetenland (1/3 of Czechoslovakia) |
| October 1, 1940 | Tuesday | Penn Turnpike pioneer toll thruway opened |
| October 1, 1942 | Thursday | 1st jet propelled airplane tested |
| October 1, 1946 | Tuesday | Bob Feller 348th strikeout of the season |
| October 1, 1947 | Wednesday | 1st helicopter air mail & express service LA Ca |
| October 1, 1949 | Saturday | People's Rep of China proclaimed (National Day) |
| October 1, 1951 | Monday | 1st treaty signed by woman ambassador - Eugenie Anderson |
| October 1, 1952 | Wednesday | 1st ultra high frequency (UHF) television station Portland Or |
| October 1, 1958 | Wednesday | Vanguard Project transferred from military to NASA |
| October 1, 1960 | Saturday | Nigeria gains independence from Britain (National Day) |
| October 1, 1961 | Sunday | Roger Maris sets record of 61 homers last off of Tracy Sallard |
| October 1, 1962 | Monday | The Lucy Show premiers |
| October 1, 1962 | Monday | US National Radio Astronomy Obs gets a 300' radio telescope |
| October 1, 1962 | Monday | Johnny Carson hosts his 1st Tonight Show |
| October 1, 1964 | Thursday | SF cable cars declared a national landmark |
| October 1, 1971 | Friday | Walt Disney World in Orlando Florida opens |
| October 1, 1975 | Wednesday | Reunion Island no longer prints stamps France takes over production |
| October 1, 1977 | Saturday | Yanks win 2nd consecutive AL East title |
| October 1, 1978 | Sunday | Yanks lose 9-2 to Indians setting up a play off game with Red Sox |
| October 1, 1979 | Monday | US returns Canal Zone to Panama after 75 years (but not the canal) |
| October 1, 1982 | Friday | EPCOT Center opens |