It's kind of odd that this is happening to everyone with express vpn on their fire device. It's also kind of funny that amazon can only point to a how to fix it temporally that the end users figured out and posted! Where is the patch for this at??? this has been a known issue for quite some time now. Hello developers do your job and fix this! We spend are hard earned money to buy this device from you but you cant fix the dang thing?????
I had the same date and time problem. It was being caused by Express VPN. Turn off your VPN and do a restart and it will fix your date and time problem. Then make sure you turn your VPN off when you turn your firestick off for the night. Make sure Auto Connect is turned off. You will have to start your VPN manually everyday if you want your date and time to display correctly. Hope this helps.
There is unfortunately no permanent fix. This happens with the 4k devices. This is the temporary solution to fix this problem. Deregister your device and log back in usually when you log back in it will say log in error no worries just delete the last 2 digits of password and re enter them then press enter. Next press the middle of black circle and play button at the same time until it says device is restarting when it comes back on youe time will be fixed until of course it happens again. Just repeat the steps.