Hagfish Day is held on October 16. This event in the second decade of the month october is annual.
Ada Lovelace Day on October 15 (was created to celebrate one of the first computer programmers);
Dictionary Day on October 16 (is held in honor of Noah Webster, the man who is considered to have fathered the American Dictionary);
Steve Jobs Day on October 16 (was established by the Governor of California in memorial to this great innovator, who passed from the world in October of 2011);
Bridge Day on October 17 (is an annual one-day festival in Fayetteville, Fayette County, West Virginia, United States);
Get Smart About Credit Day on October 17 (was established by the ABA - American Bankers Association);
Sweetest Day in Great Lakes region on October 17 (is celebrated on the third Saturday in October)