The September “Rule” That Isn’t — What Actually Invalidates U.S. Passports at the EU Border in 2025
You’ve seen the headline: “On September 1, a new EU entry rule will invalidate 40% of American passports.” It’s viral—and it’s wrong. There is no new September 1 rule and no mass invalidation. What does stop Americans at the check-in desk or the Schengen booth in 2025 is old, boring math that Europe has enforced …












