Expl: in `git log --after=2008-10-01` the time defaults to the time the command is run.
So e.g. the command is equiv to `git log --after="2008-10-01 09:00:00"` when run at 09:00:00
changes font:    Helvetica -> Ubuntu    ;     Andale Mono -> DejaVu Sans Mono
as described here https://github.com/progit/progit/wiki/Known-Issues