Nobody Stamps Your Passport at the EU Border Any More. A Database Now Counts Your Days, and It Does Not Forget.
If you hold a non-EU passport and travel to the Schengen area for short stays, your entries and exits are now recorded biometrically and your days are counted by a database rather than estimated from ink.
Why this reaches you: an EU-wide decision
What you can do. Before your next trip, add up your days in the Schengen area over the last 180 days. If you have been running close to 90, the margin for error you used to have is gone.