Go to Settings>General>Date & Time and turn off set time and date automatically.
On the upper tool bar next to the apple menu:
Go/Computer/Macintosh HD
press command + shift + "."[period] in the Macintosh HD folder to show hidden folders.
Click var>db look for timed folder. To unlock timed folder right click on it to Get info, unlock at the bottom right to make changes, then change Privilege for everyone to Read & Write.
In timed folder delete "com.apple.timed.plist" file.
Restart your computer and turn auto time back on.