Martian Calendar

Here's a calendar based on the Martian year. Now you can celebrate all your favorite holidays on Martian time! And notice that they're not just marketing it as "a nerdy thing to decorate your office with," but as "a tool for future colonists." I hadn't thought about this. When I go to Mars, I will definitely need to bring my Martian calendar so I know what day it is. It's numbered beginning with the beginning of serious Mars exploration by humans and going on from there. The days are named for planets, and the months are named for Greek deities. And of course all the seasons will be different, so we'll need to notify the groundhogs.