Feeling sluggish from the effects of daylight saving time? Don't worry, National Napping Day has you covered! This holiday, introduced in 1999 by Boston University professor William Anthony and his wife, Camille, promotes naps and their short-term benefits to mental alertness. Take a cue from today's image; this sleepy koala may inspire you to catch some Z's. These adorable Australian marsupials can sleep up to 20 hours a day, which helps them conserve the little energy they get from their eucalyptus-based diet. Koalas move slowly when awake, spend most of their time tucked into nooks in trees, and have a lower body temperature than other animals of their size. Let's find some time today to sneak off to a peaceful spot to experience the benefits of Napping Day.