I saw this on National Day Calendar today – https://nationaldaycalendar.com/october-24-2020-national-make-a-difference-day-national-food-day-national-bologna-day-united-nations-day/.
When I served three terms with AmeriCorps, Make a Difference Day was an expected day of service. My last term was in 2009. It sounds like some AmeriCorps programs are not participating this year or are doing alternative options that don’t involve large groups coming together in person.
Other days listed on the link: National Food Day and National Food Day History, National Bologna Day, and United Nations Day.