Ask a Stupid Question Day is September 28th (can also be on the last day of school)
Ask a Stupid Question Day is a holiday dedicated to encouraging people, especially students, to ask any question they want with the fear of being ridiculed. On this day no question is too dumb or out there. If you want to know just ask! The traditional date of this holiday is September 28th, but some people celebrate it on the last school day in September.