👨💻 says this could be fun!
In reply to https://geekusa.wordpress.com/2007/12/04/act-like-a-time-traveller-day/ (https://www.frederickcalica.com/?p=3328036)Act Like A Time Traveller Day
You must spend the entire day in costume and character. The only rule is that you cannot actually tell anyone that you are a time traveler. Other than that, anything’s game.