On Windows, the Integration Service does not run a scheduled workflow during the last hour of Daylight Saving Time (DST). If a workflow is scheduled to run between 1:00 a.m. and 1:59 a.m. DST, the Integration Service resumes the workflow after 1:00 a.m. Standard Time (ST). If you try to schedule a workflow during the last hour of DST or the first hour of ST, you receive an error. Wait until 2:00 a.m. to create a scheduler.
The Integration Service schedules the workflow in the time zone of the Integration Service node. For example, the PowerCenter Client is in the local time zone and the Integration Service is in a time zone two hours later. If you schedule the workflow to start at 9:00 a.m., it starts at 9:00 a.m. in the time zone of the Integration Service node and 7:00 a.m. local time.