[complex_pi]

Well visible in Belgium starting around 23:30 ! Even with the naked eye ! (From outside the city)

[DoingIsLearning]

Still true now? In the netherlands hard to tell anything. Certainly nothing on the level of the Swiss pictures being shared.

[clmul]

Around 1 AM at night this was the view in the east of the Netherlands: https://imgur.com/a/kloWEOl

With the naked eye I could see moving bright "clouds", and sometimes see streaks of red inside them. After 1:30 it died out quite rapidly for me.

[complex_pi]

I stayed up until about 1AM only. Views from the mountains are hard to match in any case 8-)