Finals have been on Sunday for ages iirc.
More of an issue now like because most want to go on the piss to watch it with work on Monday.
The 2018 WC final was on mid afternoon but that would have been due to the time difference in Russia.
8pm at night is a crap kick off time? It's been used for decades.
I think the last Euros to kick off mid afternoon was Euro 96 (even that might be wrong). The last WC to kick off early was 1994/2014 but that was due to the European core audience.