Over the year change, we always do a big family planning session for the year — trips, vacations, special activities like renovations etc.

I find this works best when thinking in weeks, not months, and being able to see everything at once. So I always print a large, 5-6 pages weekly year calendar and we sit around it and plan together.

It's really nice to see the whole year at once!

If the mental shape of your year is rather circular I have this one on offer. It is meant as a rough overview rather than detailed planning however and it might not fit a whole family:) I usually print it poster sized.
https://github.com/Flave/circular-calendar/blob/main/print/2023_CW.pdf
circular-calendar/2023_CW.pdf at main · Flave/circular-calendar

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@flavio nice one!