Setting TZ[local] as a timezone within Time of Day Step means that UCCX will use the server that is currently acting as Master. That means, TOD will work as per the time that the current master server will be showing up when you issue utils ntp status.
In an ideal situation, if you are pointing UCCX to CM wherein DST cop file is provided every time when DST starts/ends then this should not be a problem as UCCX will sync its time from CM and once DST cop is applied on CM same should reflect on UCCX. If you are pointing UCCX to a NTP server then you will need to adjust TOD accordingly such as if time has moved 1 hour later then set start time as 7:00 AM if you want CC to open at 8:00 AM.
Regards
Deepak