Grab a flapper dress, don a headband and stroll around telling people you were just sipping a gin cocktail in a New York City speakeasy when a phone booth appeared that transported you to the 21st Century. Yep, that’s what Pretend to Be a Time Traveler Day on December 8 is all about.

The Wayback Machine is the internet’s version of time travel. The Wayback Machine captures copies of websites and preserves them so you can see what sites looked like back in the day. It’s also a great way to get perspective on past designs and the evolution of a site.