Based on the search results, there is no specific specialty for today, October 13, 2023. The search results show different holidays and special days for September 21, September 22, and October 12, but none for October 13. Some of the holidays and special days mentioned in the search results include National No Bra Day, World Sight Day, National Pulled Pork Day, National Savings Day, and World Arthritis Day. However, none of these are relevant to October 13.