My first real job after graduating from college was working the reference desk at a public library, so it makes me chuckle whenever I post artwork or diary pages online how often people ask me about my date stamps.
I have 4 date stamps here in the studio: my favorite is a cheap, self-inking Miseyo, my least favorite was purchased from Office Depot in the middle of a book tour, and the other two are of unknown origin (probably stolen from the supply closet of one of my former employers):