For anyone who comes across this, you can use date --set="date -s "27 APR 2020 16:42:00"
to set the date roughly to the right time which should solve most problems that occur from a time offset that is too big.
To write the system time to the HW clock use hwclock --systohc
.
Should the time again be way off after a reboot / power cycle check the battery on the motherboard that supplies the HW clock. It might be empty.