Canning Day
Canning Day falls on October 23, at the end of the preserving season, honoring a technique invented for Napoleon's army decades before anyone understood why it worked.
October 23
5 holidays
Earth creation day
Earth Creation Day falls on October 23, the date a 17th-century archbishop calculated the world began, using the best method available to him.
iPod Day
iPod Day falls on October 23, the anniversary of the 2001 announcement of a music player that was neither first nor cheapest and reorganized the music industry anyway.
Mole Day
Mole Day runs from 6:02am to 6:02pm on October 23, a chemistry joke encoding Avogadro's number in the date and time, and taken seriously by teachers.
Tv Talk Show Host Day
TV Talk Show Host Day falls on October 23, the birthday of Johnny Carson, who hosted The Tonight Show for thirty years and set the shape the job still has.