I agree with the OP. The option for players to be able to set their gameclock to local time should be removed (we all have a clock for that in our taskbar or on our wrist), and the 7 different time/date formats we're currently facing should be reduced down to one.
I don't care if this is labeled as minor or major, just as long as it's finally done after having the community beg for this for 2 years in countless threads.
If you check the bugsection, about every 10th issue is directly related to this, all of which could have been avoided a long time ago.