The Annual Course in Cytometry is an opportunity for experts in Cytometry from around the world to share their knowledge with the broader Cytometry community. It is usually offered in June each year and with the exception of the 2020 and 2021 pandemic years it has been held every year since 1977. Over the course of seven days, approximately 40 instructors and 90 students participate in lectures, including a Keynote Speaker, labs, and networking events. Students have access to over 20 lectures, as well as their choice of 5 of 15 laboratory sessions. We couldn’t do this without the support of our sponsors, who are highlighted in a vendor night each year.