I've just now experienced this in the course of fixing another issue.
Normally in spite of how much i change ROMS whenever I set time manually and uncheck network derived time the date/ time maintains across restarts, now it doesnt.
It looks like a 4.4.4 issue? Dunno
Any help / ideas welcome.
What I did so far:
clean ROM not dirty flashed
switching between stock OMNI and Minux OMNI
all combinations of option in date/ time settings while
Each and everytime after reset the date time is 13 Aug 1970. Even if is set to automatic that date briefly appears before a connection to the net is made.