Major WM/H events

[dr_norbert]

I'm looking to catalogue next year's major European events for a blog post. If you know of an event that is either:

a. 2.5-3 days long or
b. Predicted to be 6+ rounds long

Please message me with:

1. Name of event
2. City, Country
3. Exact or approximate date (its typical month is enough)
4. Website and/or FB page

Thanks!