According to the search results, October 10, 2023, is a Tuesday and there are several holidays and observances celebrated on this day. Some of the holidays and observances include Ada Lovelace Day, Headspace Day (Australia), Hug a Drummer Day, International Face Your Fears Day, International Powers of Ten Day, Squidturday and Squittle Day, and the second day of the International Cephalopod Awareness Days. Additionally, there are ongoing multi-day events such as American Beer Week, Fat Bear Week, Improve Your Home Office Week, and National Fire Prevention Week. However, it is important to note that the search results do not indicate any significant or historical events happening on this day.