It's Isaac Newton's birthday. At least, it's the anniversary of his birth - January 4, 1643, according the the Gregorian calendar.
If you're a purist, you might have already marked the anniversary of his birth, on December 25th. As according to the Julian calendar, in use in England, at the time of his birth, the scientific great was born on Christmas Day, 1642.
Either way, there's a "free feature", animated, video clip (meaning you can view it without a subscription) about his life, at BrainPop.com, today.
It's great to be a homeschooler.
Picture credit from Wikipedia : Godfrey Kneller's 1689 portrait of Isaac Newton