You are right, that can't be right. Here's the Strava run: https://www.strava.com/activities/4748319774Well, it can't be December. He rode Namur on December 20th, after having won in Gavere on December 13th. No way we went between weekends from Belgium to UK back to Belgium with all the covid restrictions in place.
It says 18th December 2020 as date, but the time of activity starts at around 1222:22:53. 1222 hours is 51 days. Add that to 18th December and you get 6th February.
I think we can conclude that he needs to get a new watch