Mine is from july 2017 and worked perfect until now. The clock gets reset to 2016-01-01 almost every day. Problably because the internal battery dies before I start the car the next day and the dashcam gets powered again through the cigaret lighter connection, which is not powered when the ignition is turned off.
I do not have a GPS connected. I wonder if you have a GPS, will it sync the time from the GPS signal?
I would not care for the the date/time being wrong recorded, but the problem is that the dashcam stops recording because the older files have newer dates and then it does not overwrite them when the memory card is full. Miine does not take larger cards than 32Gb.
Firmware version is: DAB201 ZX-AMF-G-2534Y