Comment # 3 on bug 1178432 from Frederic Crozat

(In reply to Ulrich Windl from comment #2)
> (In reply to Frederic Crozat from comment #1)
> > duplicated
> > 
> > *** This bug has been marked as a duplicate of bug 1178349 ***
> 
> After reading bug 1178349, I'm unsure: My system time is correct and the
> time in the GNOME panel is also correct; only the screen saver's time is not.
> The bug referenced does not even mention screen saver!

Did you reboot your system (or restarted gdm) after installing the timezone
update released this morning on Leap 15.x ?