Update: CyanogenMod 14.1 v480 20161215 – TimeKeep
Thanks to Dan Pasanen (invisiblek), the time/date bug is fixed. Since Qualcomm chipsets have read-only RTC drivers, there is a need to use TimeKeep to store time delta related to hardware RTC.
If you already have a previous version of CM-14.1 installed, just download the updated ZIP file and flash it. If you are still using stock ROM and want to flash CM, just follow the instructions in the link below: