Daylight saving time is done automatically in ClearPass, as Colin explained following the Linux standards.
During configuration you can set the timezone per appliance to the Continent and Country; then DST is handled automatically.
If you want to change the timezone after the initial configuraiton, you can use the CLI to do that. Find the manual/help for that feature:
https://<enter the ip of your clearpass here>/tipshelp/html/en/index.htm#CPPM_UserGuide/CLI/Configure_Commands.htm?Highlight=timezone
date
Use the date command to set System Date, Time, and Time Zone.
Syntax
configure date -d <date> [-t <time> ] [-z <timezone>]
or
configure date -s <ntpserver> [-z <timezone>]
-z <timezone> | Specifies the syntax. To view the list of supported timezone values, enter show all-timezones. This field is optional. |