Well, to be precise, two days. New Year's Eve 2013 and New Year's Day 2014.
Natalie kept asking me to read the strips back to her throughout the day, and Jenna grabbed my sketchbook whenever I completed a few more hours. It was a collaborative process. Natalie even illustrated one hour on her own! I'm posting it here as bonus content since I hit Flickr's image limit.
"try to catch me"