When Schengen days come back

Old stays age out of the rolling window

The 180-day window moves. When a past day of presence falls outside the last 180 days, it stops counting toward the 90-day total.

Those days become available again. That is why the same trip length can fit or fail depending on when you enter.

Why spreadsheets go stale overnight

A static tally assumes yesterday's window. Overnight, another old day can fall out of the look-back — or your planned stay can push new days in.

If you plan from a frozen spreadsheet, you can leave usable days unused, or book a trip that no longer fits.

Moving the entry date can unlock room

Entering a week later can change your leave-by date a lot, because earlier stays may have aged out of the window by then.

Waiting for an old stay to fall off can unlock a longer trip than entering tomorrow. The reverse is also true: entering earlier can shrink what still fits.

How Stay180 surfaces this

Stay180 lists dates when days free up so you can plan around them instead of guessing. Pick an entry date, see the leave-by date, and compare what happens when you move entry forward to after a free-up date.