I'm in the pacific time zone, and I've set the org-clock-mode-line-total to
today. The modeline display that shows the current time for today seems to
consider 'today' as UTC midnight to UTC midnight and does not respect my
timezone. I have to set the org-extend-today-until variable to 8 (PST-UTC
difference) to fix this. I ran emacs with -q and ensured that the git
commit was pristine before testing this. Is this expected behavior, a bug
with emacs/org-mode or an incorrect setup?

emacs: 25.3.1
org-mode: git master head (e490d27) - post release 9.1.6

Regards,
Jose