The 5th WEOI (2025) will be held on June 25th – 27th, in a primarily on-site-only format in Barcelona.
Organized by
Sponsored by
Participating Teams
In alphabetical order
 | Belgium | |
 | France | |
 | Ireland | |
 | Italy | |
 | Luxembourg | |
 | Netherlands | |
 | Portugal | |
 | Spain | |
 | Switzerland | |
 | United Kingdom |
Schedule
| Day | Time | Activity | Location |
|---|---|---|---|
| June 25th (Friday) | From 13:00 | Arrivals Registration | |
| 13:00 – 17:30 | Leisure activity | City | |
| 19:00 – 20:00 | Opening ceremony | City | |
| 21:00 – 22:00 | Dinner | Hostel | |
| June 26th (Saturday) | 07:00 – 08:00 | Breakfast | Hostel |
| 09:00 – 09:45 | Practice contest | CFIS | |
| 10:30 – 11:30 | Leisure activity | City | |
| 12:30 – 14:00 | Lunch | CFIS | |
| 14:00 – 19:00 | Contest | CFIS | |
| 20:00 – 21:00 | Games | Hostel | |
| 21:00 – 22:00 | Dinner | Hostel | |
| June 27th (Sunday) | 07:00 – 08:00 | Breakfast | Hostel |
| 09:00 – 12:00 | Closing ceremony | CosmoCaixa | |
| From 12:00 | Departures |
Environment
All contestants must participate using the same contest environment: a virtual machine which is mandatory to be running on their personal laptop.
This is last year’s official virtual machine.
All contestants must be running from within this VM.
A guide to install and use the virtual machine can be found here.
Attention: This virtual machine has internet restricted to only allow access to the contest platform.
Regulations
As reference, these are last year’s regulations:
Contributors
This year’s olympiad was made possible thanks to the contributions of:
| Host committee | Jacobo Vilella Vilahur (Head) María Lucía Aparicio García Adriana Aguiló Martínez |
| Scientific committee | Félix Moreno Peñarrubia (Head) The rest will be announced in July 2027 |
| Task authors | To be announced in July 2027 |
| Technical committee | Luca Versari (Head) Jacobo Vilella Vilahur Eljakim Schrijvers |
| Design | Amal Dokkar El Hamoudi |
| Communication | Jacobo Vilella Vilahur |