The Avast logs, Event & Update are using GMT.
UK time right now is BST = GMT+1 (https://greenwichmeantime.com/time-zone/europe/uk/time/)
My PC is using BST

Avast isn’t the only software that when installing takes your country and its standard zone.
Daylight Saving is a real pain in the neck and not relevant any more, it goes back a long time.

I got an error message yesterday when checking for update, something about not getting server.
Later I tried to check the logs, without thinking about zones, didn’t find anything.
Then realized about the -1 and still couldn’t find anything