The time zone in your MSPComplete portal will reflect the local time zone of the machine from which the user is logging on. Any scheduled times will then be converted to UTC, which will be used to determine the correct local time for profile cutover for each end user.
For example, if you are logged in to your MSPComplete portal from a computer that is in the Pacific Standard Time (PST) zone, the profile cutover time will be shown in PST. Therefore, if you set the time to be 11pm, that will be 11pm PST. If your end users are in the Eastern Standard Time (EST) time zone, their profiles will be switched over at 2am EST.