DST changes gone after reboot

["Alex Bron" <bron iae nl>]

Dear all,
 
I have a nice server with its timezone set to Europe/Amsterdam (DST
enabled). Everything works fine except for one thing. In winter, system
time is always correct. When going into DST, the clock adjusts itself
and again time is correct. However when I shutdown my server right
now, and boot it up again, the clock is 1 hour behind - just as if the
DST change is forgotten. As this server is also time server for the rest
of my net, it's double trouble as all clocks are starting to run slow.
How can I solve this?
 
Regards, Alex Bron