I know this sounds super simple but, assuming I understood your issue as the same as my issue- my mac would not allow me to change the time zone- for example some parts of my country turned off daylights savings, and other parts did not, and it had me in the 'wrong' part- even when I would change it, it would jump back- both if I set it to 'set time and date automatically' or not.... In short- I discovered that - if I choose my correct location 'closest city' through the drop down menu, the problem occurs, as described above. BUT, if I type in my city, at least a few letters, and then hit 'enter', then it DOES save my correct 'closest city', which does have the daylight savings correct...and then even when I click on the 'set time...auto.' it keeps my time zone etc etc hope this helps someone nb