ams.br

@ams.br Allow me to join the chorus. Thank you for posting your easy-to-follow instructions. I was able to build the current Armbian kernel with your patch and install it without any issue at all. The system has been up 1 day and 11 hours. I finally took the step of installing your patch after the system time-jumped twice over the weekend.
 
I can't say for sure yet that it fixes the problem for me, but I can say that your directions made it a piece of cake to build and install, and so far, so good.

Thanks!
 
Updated 2019-11-18: My patched Pine has been running for 7 days and 12 hours now without issue, which is the longest it has ever run without experiencing the time jump.

Thank you ams.br for the solution.
I run 7 pine64so on the clusterboard and two of the SoCs had this problem. I would get the error almost immediately under heavy cpu usage.
Now my test SoC is running 20h straight at 99% cpu usage (Seti@home) and the date is still in 2019.
Cool stuff. thank you once again

@ams.br seems like your patch works!

at a Linux OS (Armbian recommend Ubuntu), download the latest source of armbian build
git clone https://github.com/armbian/build.git copy patch file arm_arch_timer.patch to folder userpatches/kernel/sunxi-next (more details in documentation). Run the compile script
./compile.sh choose "U-boot and kernel packages", apply.
 
choose "Do not change the kernel configuration" for a standard kernel, or "Show a kernel configuration menu before compilation" for customize your kernel (recommended for advanced users), apply
 
choose your board
 
choose "next"
 
apply, and now just have a coffee and wait. After compilation deb packages generated at folder output/debs, copy the deb packages to you Armbian and run dpkg -i *.deb
 
more details at https://docs.armbian.com/Developer-Guide_Build-Preparation/
arm_arch_timer.patch