I recently bought my 2026 calendar refills. I am so boring – I always buy the same layout, for the same reason. And I always buy Burde.
I purchase two week-on-two-pages vertical layout refills. The second one is a spare for if my original page tears or becomes too scribbled out to easily read. The most important thing is that I know where I am supposed to be and when. I rely 100% on my calendar because each day is different and I am in up to seven different places a day. I have constant cancellations and reshuffles so sometimes my pages become messy.
Behind that is always a page-a-day calendar for my daily to-dos. And behind that, lined notepaper.