Johannes Schindelin [off-list ref] writes:
Now I expect the same of relative mode, only that the timezone does not
matter for relative mode _at all_.
...
However, I was very surprised when "git log --walk-reflogs
--relative-date" showed me "in the future" for my last commits.
Exactly.
You are absolutely right. I should have done that when I did
the show-branch --reflog workaround to pass 0.