29 and Leap Years

Astronomer Dr Meghan Gray on leap years and Julian dates.

Meghan is making a "guest appearance" on Numberphile and is more familiar to viewers of our sister channels DeepSkyVideos and Sixty Symbols.

DeepSkyVideos: https://www.youtube.com/user/deepskyvideos
Sixty Symbols: https://www.youtube.com/user/sixtysymbols