National Napping Day is the day after the return of daylight saving time.  According to nationaldaycalendar.com, National Napping Day provides everyone with the opportunity to have a nap and catch up on the hour of sleep they lost due to the spring forward time change. 

William Anthony, Ph.D., a Boston University Professor and his wife, Camille Anthony, created National Napping Day in 1999 as an effort to spotlight the health benefits to catching up on quality sleep.  “We chose this particular Monday because Americans are more ‘nap-ready’ than usual after losing an hour of sleep to daylight saving time,” Anthony said in B.U.’s press release.