Just bought a 2026 https://supamoto.co continuous calendar, because after years of use they remain the best way I’ve ever seen to manage a year’s worth of work deadlines, upcoming events, personal time, holidays, and more. I’m a 12"×18" Sunday-start man myself, but there are other sizes and starts available. They’re *very* reasonably priced, made by a small business. I bet they make pretty good gifts, too.
(Disclaimer: I have no affiliation with the maker; I’m just a fan.)