A certain generation like to see a physical item, calendar, diary etc. They like to write things in them, it's habit. It will die out but not yet.I mean, almost everyone does, actually. It's 2023 now. There cannot be many who don't have some sort of device.
Are those elderly relatives likely to buy a calendar of topless old women? I would suggest not. There is zero target market for this.
WI, university teams, football, rugby, cricket teams, young farmers etc knock these out every year. Someone must be buying them.