Yesterday I was contemplating how the body battery algorithm would cope with daylight saving, and behold I guess I have stumbled on a glitch
Looking at the graph the BB level reverts back to the level it had 1 hour prior, when at 3AM CET the clock was put back one hour.
Not a real issue, but the additional hour sleep did not add to restoring my BB so my Garmin suggested to take it easy today.
(btw: sleep tracker, missed the additional hour too)