Baikal

(Bad computer janitor joke, forgive me)

Gregorian

Edit: The others just don't feel right

My wife got me this one last year. Makes me laugh every time.

Stavvy! Stavros halkias calendars are a great gift for any gender / sexual preference. Makes everybody smile. Love that guy.

If American, the National Parks Lore cryptid calendar.

Try getting a whiteboard calendar. We had one that was just one month and it got a lot of mileage in our household. Underneath was a second blank whiteboard that was roughly the same size. We used that one to write down dates of events that weren't in the current month. Both of the whiteboards had a lot of space for writing stuff down.

You'll want to clean it off every few months with isopropyl alcohol. When I cleaned it I would take a picture beforehand and write everything back down again.

Best part? You'll only need to buy the whiteboards once.

Moved out alone? Then absolutely "Hot Firefighter Guys" calendar (as a jape, funny for straights and gays alike). If it is poorly received you can have a backup Sport's Illustrated girl calendar ready to soften the blow of his solitude.

Moved in with a partner? Get a large format poster size calendar with ample room for people trying to figure it out and working with other people's schedules. Include black sharpies with this one.

The absolute best calendar I ever had was the free one from the welding supply company AirGas. Truly stunning photography of hot welding action. And the calendar itself was chock full of useful info like week numbers, holidays in the USA, Canada, and beyond. And overall, it was a large format that's suitable for marking up and handwriting entries.

I'm only sorry that I wasn't able to get the 2026 version due to business sending me away during January.

According to whencanireusethiscalendar.com, for 2027, you could rustle up a classic nude calendar from 1999, a popular era for them, or something completely random like this.