A family of Microsoft word processing software products for creating web, email, and print documents.
Somebody at Microsoft goofed.
Clearly, these calendar templates should all contain macros that ask for the year and then arrange the dates correctly. A template that contains macro code must be saved as a *.dotm (macro-enabled) template file. The templates that you can download from the File > New page now are all *.dotx files, which cannot contain macros. That makes them useless unless you really need last year's calendar!
I'll report this, and you can too, by going to File > Feedback > Send a Frown. It will be someone's job at Microsoft to resave the templates with code as *.dotm files.
Meanwhile, follow the suggestions in Charles's post for this year's calendar.