hwclock -w
hwclock: Cannot access the Hardware Clock via any known method.
hwclock: Use the --verbose option to see the details of our search for an access method.
pi@DigiTrax:~ $ hwclock --verbose
hwclock from util-linux 2.33.1
System Time: 1609439852.294586
Trying to open: /dev/rtc0
No usable clock interface found.
hwclock: Cannot access the Hardware Clock via any known method.