Well, how unsurprising.
The announcement for the end of Season 20…
…said that EU’s season would be ending at 17:00 CET.
This is despite Europe currently being in daylight savings time, and they’re currently utilising CEST (Central European Summer Time), which is UTC+2 / CET+1. That means the season should have ended 15 minutes ago, at 17:00 CEST.
It’s not just EU which didn’t end on time…
…the Asia server’s season end is now more than seven hours overdue.