The 4th WEOI (2026) will be held on June 26th – 28th, in a hybrid format in Luxembourg.
Sponsored by
Participating Teams
In alphabetical order
 | Belgium On-site | |
 | France On-site | |
 | Ireland On-site | |
 | Italy On-site | |
 | Luxembourg On-site | |
 | Netherlands On-site | |
 | Portugal On-site | |
 | Spain On-site | |
 | Switzerland On-site | |
 | United Kingdom Hybrid |
Schedule
| Day | Time | Activity |
|---|---|---|
| June 26th (Friday) | 16:00 – 19:00 | Arrivals Registration |
| 19:00 – 22:00 | Dinner Activities | |
| June 27th (Saturday) | 07:00 – 09:00 | Breakfast Walk to contest hall |
| 09:00 – 11:00 | Practice contest | |
| 11:00 – 13:00 | Lunch | |
| 13:00 – 18:00 | Contest | |
| 18:00 – 19:00 | Walk to ceremony hall | |
| 21:00 – 24:00 | Dinner Sponsors Awards ceremony | |
| June 28th (Sunday) | 07:00 – 09:00 | Breakfast |
| 09:00 – 12:00 | Closing ceremony | |
| 12:00 – 14:00 | Lunch | |
| 14:00 – 17:00 | Activities |
Environment
All contestants must participate using the same contest environment: a virtual machine which is mandatory to be running on their personal laptop.
As a reference, 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
Contributors
This year’s olympiad was made possible thanks to the contributions of:
| Host contributors | Luca Courte Laura Shaw Barragán Pascal Zeihen |
| Scientific contributors | Daniel Murphy |
| Technical contributors | Luca Versari Jacobo Vilella Eljakim Schrijvers |
| Design contributors | Eljakim Schrijvers |
| Communication contributors | Jacobo Vilella |