Take A Siesta, Rockford! It’s National Napping Day With today being National Napping Day, I suggest you non-nappers give it a shot and see what the rest of us, famous or not, have enjoyed for quite awhile. This unofficial holiday is generally observed the Monday after Daylight Saving Time begins to allow sleepers to adjust to their new schedule. According to SleepAdvisor.org, National Napping Day was " invented by William Anthony, Ph.D., a professor at Boston University, and his wife Camille Anthony in 1999. The couple wanted to help educate people about the power of a good snooze and how getting just a little extra rest could be important to their health."