The calendar I use is from Field Notes. It’s a 56-Week Planner you can start any time of the year. It gives me enough room for all the things I want to remember to do each day. Yes, it’s a bit of work to write in the dates; but I’ll do that once every 56 weeks. I prefer hard copy calendars vs. online calendar apps. Use whichever means gets the job done rather than pressure from anyone to use one method or another.
I also use Field Notes notebooks to take notes when I’m planning a trip and for notes during the trip. They are small enough for backpack or pants pocket.