You should know this ahead to fully enjoy that beauty of compact, mathematically sound week chart, and perhaps the accompanying momentary illusion that world makes sense again.
The next opportunity to enjoy most compact possible calendar page will be in 2038, so don’t miss it!
(Bonus: if you notice that 1st week is week 5 so apparently January 2027 also has 4 weeks–what gives? That’s because in ISO week numbering, first three days of January 2027 count as week 53 of 2026. In other words, week 1 of 2027 starts on January 4th.)
If your calendar starts with Sunday, this past February of 2026 was actually compact, and the next one is in 2037.
This is fun. I have an event that I have monthly that I time by writing in the 4th Sunday cell and then wherever that lands in the month is where it is. I guess next year it will actually be 4th Sundays.