Today is World Sleep Day, a day intended to be a celebration of sleep and a call to action on important issues related to sleep, including medicine, education, social aspects and driving. It's by the World Sleep Day Committee from the World Association of Sleep Medicine. (taken from http://www.worldsleepday.org/)
I heard of this day last year, ironically on the day that our math portfolios were in, which meant no one in my cohort got a good nights rest. In fact, the word "ha!" was used a lot. This year, all of us can finally get some sleep (apart from those in NS).
And in honour of World Sleep Day, here's an infographic from FrugalDad on why sleep is important.