> Kernel doesn't know when DST transitions occur though. > Its an utter mess and usually needs shell/cron scripts to catch this. So, when these transactions will occur... then cron script can be used, else let it continue as it is. i.e. by default -m time can be used. If there are issues with it (on case to case basis like DST, which is once in 4 months!), shift to cron ... but only if needed!