The Challenge

A traveler on Reddit sought advice for calculating their complex multi-trip itinerary spanning two 180-day rolling windows in the Schengen Area in a Reddit thread. The challenge wasn't just about counting days, but understanding how the rolling window mechanism affects stay calculations across multiple trips.

Background

The traveler had completed several trips to the Schengen Area:

• May 21-22, 2022: Paris, France
• July 7-10, 2022: Porto, Portugal
• August 10-25, 2022: Multi-country Schengen trip
• November 11-18, 2022: Spain
• February 2 - April 20, 2023: Multi-country Schengen trip

They needed to determine any breaches and how many days they stayed in the Schengen area.

Results from using the Schengen Calculator

1. It correctly identified 2 non-overlapping windows.
   1. 21st May 2022 to 16th November 2022.
   2. 17th November 2022 to 15th May 2023.
2. It divided a holiday period between two windows.
3. It correctly identified remaining days.
4. It highlighted there were no breaches.

Results from the Melimundo Schengen Calculator showing the analysis of multiple trips across 2022-2023

Comparing it against the official calculator

I wanted to compare the Melimundo Schengen Calculator with the Official Schengen Calculator to make sure it not only has great timeline features, but it's accurate and reliable.

1. It showed also there were no breaches.
2. Unfortunately it doesn't display multiple travel windows, so it's not as clear what the stay looks like.
3. It also doesn't show the remaining days.

Things we can improve

You cannot take the remaining 10 days any time you want because you get overlapping breaches. The Melimundo Schengen Calculator highlights this, but only if you put additional dates in.

In future, I think it would be good to let users know when they can take the remaining days of a 180-day window.

Other Questions (from original Reddit post):

When does the first 180 days start?

In this case, 21st May 2022. However, it depends if there are any breaches. The windows are rolling periods of 180 days. So as long as there are zero windows with 180 days, the start period can be any day that contains all the travel periods.

And what time chunk am I now?

I didn't fully understand this question because the post was old. However, they had 10 days remaining.

Conclusion

This case study shows how Melimundo's calculator makes complex multi‑trip planning easy to visualise. I invite you to try it alongside the Official Schengen Calculator — and let us know what features you’d love to see in future releases!

This case study series looks at real or planned trips reported by people across the internet to 1) test the accuracy of the Melimundo calculator and 2) highlight any improvements in how it functions.