OS X timezone incorrect without internet connection

Question

After rebooting my macbook and my wifi is off, usually timezone changes randomly.

• I tried to uncheck the "Set date and time automatically" option
• Tried to uncheck the " Set time zone automatically "

Nothing helps, I want to set a default timezone/time to remember without internet connection

( can't really tell if its timezone-related but time/clock is always incorrect after boot without internet connection )

System Preferences shows this

Answer 1

Reset the PRAM, by holding the keys cmd-alt-P-R during startup. If the symprom does not go away, the PRAM battery is the culprit.

Answer 2

Is your machine older than 4-5 years?. Perhaps is the PRAM battery (holding the time settings) out of power.