Update your calendar with a refill for the current year (if needed), or buy undated pages where you fill in the dates. Our coaches usually recommend undated pages for their flexibility.
If you have undated calendar pages, write dates on your pages now for at least the next couple of months.
Add or update monthly and yearly pages for far-distant appointments. (You will write appointments on the weekly/daily pages unless those pages are not in the planner yet. When you add new weekly/daily pages, transfer monthly/yearly calendar appointments to your daily calendar.)
Move existing appointments from wall calendars, agendas, and appointment books into your new daily calendar. You need to work from just one calendar.