Hi, Vitaly
RTC should work on both v1.3 and v1.4 boards. The following command works fine here with RTC battery attached:
date -s 20190909
hwclock -w
Power off the board and remove the power adapter. Wait for some minutes, power on
hwclock -r
The date is still 20190909.
If you have issue with RTC time, maybe it’s a hardware issue, the battery connector is somehow defective.
Check also:
RTC alarm: