UTC (or not) on debian

Most of the time server hardware clock are set to UTC and a localtime is computed by the system. It is possible to have a hardware clock set to localtime by setting the UTC variable in /etc/default/rcS.

To make it work you must ensure that /etc/init.d/hwclock*.sh script are good. You may need to add this to ensure that the call to hwclock work properly:

HWCLOCKPARS=--directisa