Yes and no.
The C Series do not have a hardware clock. So each time you reset it will reset it to the beginning of the epoch.
However, there is a 'kinda' fix. Install the 'slutils' package. This creates a file 'sltime' in /usr/bin
Now each time you run 'sltime -set', it will take the current time and store it on the Z.
Each time you run 'sltime' (without any parameters) it will restore the saved time.
So it may be useful to have it 'set' the time when the unit is shut down, or each time it suspends, or even via cron every 30 minutes, and have it 'restore' the time on a reboot.
I'll probably create an ipk with this all auto one day soon.
- Bundabrg