Today plus 179 days behind it
A 180-day reference period is a moving window. Pick a day you want to test, include that day, and look back through the previous 179 calendar days. The stays inside that interval contribute to the total. Move the test date forward by one day and both ends of the interval move forward by one day.
Nothing resets on 1 January, at the start of a visa year, or six calendar months after the first trip. Six months is not a reliable substitute for 180 days because calendar months have different lengths. The Commission instructs travellers to count back 180 days from each day of stay.
Days return gradually
When a used travel day becomes older than the window, it stops contributing. If a past stay lasted 20 days, those 20 days usually do not all return at once. The first old day leaves the look-back first; the remaining days follow one by one as the test date advances.
That gradual release explains why “wait until the trip is six months old” is too coarse. The useful question is which exact historic dates sit inside the proposed day’s interval. A transparent calculator should show the window start, the counted stays, and the total, rather than only displaying a green or red badge.
The 90-day absence shortcut
EU guidance explains that an uninterrupted absence of 90 days allows a new stay of up to 90 days. This works because, as the new stay progresses, earlier presence continues to leave the rolling window. It is a useful sanity check, but it should not be stretched to cover interrupted absences or a status that follows different rules.
A shorter absence can still restore some days. The amount depends on the shape of the previous ledger. Two travellers who have both used 60 days may regain allowance on different dates because one travelled in a single block and the other spread visits across several months.
Inspect a future date safely
Start with completed stays only. Choose the proposed entry date and calculate the days already present in its 180-day look-back. Then simulate each day of the planned stay. Stop at the first day whose look-back contains more than 90 days. Do not treat the allowance on entry as permission to remain for that many days without repeating the daily test.
Keep planned ranges visually distinct and avoid overwriting the historical ledger. If an old trip is edited, the result should be recalculated from scratch. Before booking a non-refundable itinerary near the limit, repeat the plan in the Commission planning mode and consult the competent authority if any stay may be excluded or classified differently.
- No fixed reset date exists.
- Old days leave the window one at a time.
- Every proposed day needs its own look-back.
Official sources
- European Commission — Short-stay calculator rolling-window instructions
- EUR-Lex — Schengen Borders Code
Sources were checked on . Linked institutions may update their guidance after that date.