Hi,
I noticed the same problem with DCS-2121 date/time reset to 1/1/2009 after each reset e.g. caused by a power failure.
Despite NTP is set in the configuration, it does not seem to retrieve the right date event after 2 days.
This is really annoying as I wanted to base my application only on the snapshot feature without external server which could use its own date to timestamp pictures ...
model : DCS-2121
firmware : 1.04