Exercise Through Advent ~still in there and correcting an oops

Have made it to day 10 of my exercise through Advent calendar and went to see what today's exercise was and, well, oops.  It seems I either neglected to add days 10, 11, 12, and 20 or somehow those were deleted.

So here is the corrected calendar:

So today's exercise is 10 bear crawls. Here is a video in case you're not sure what a bear crawl is: