Check out this article to see some deals from national pizza chains.
www.usatoday.com/story/money/food/2022/02/08/pizza-day-deals-2022-freebies/6690102001/
"In the United States, 17% of all restaurants are pizzerias."
nationaldaycalendar.com/national-pizza-day-february-9/
This article goes restaurant by restaurant listing the deals available today.
www.cnet.com/how-to/national-pizza-day-all-the-deals-and-freebies-you-can-get-today/