Not, not April Fools Day. April Fish Day, or as the French also refer to it: "Poisson d'Avril" (it is apparently also celebrated in Italy, Belgium, and French-speaking areas of Switzerland and Canada). I learned about this tradition way, way back in French class and always felt it was, though silly, a much better option that the cruel tricks children (and, of course, adults) play in American on April 1st. Instead of concocting elaborate pranks, the rules of April Fish Day are simple: attempt to attach a paper fish to someone's back without getting caught. When that person discovers the paper fish, they are declared (and occasionally will shout) "poisson d'avril!" See, simple.
In the late 19th and early 20th century, Poisson d'Avril. cards were very popular. You can spend hours looking them up online. My favorites are the photocards, which is what brings us to today's digital curation. I scoured the internet and selected some of my favorite Vintage Fish Day photocards for your amusement. I hope you will not only enjoy them, but maybe be inspired to keep your own pranking a bit practical or simple this year.