SMS says the patch is run, but it doesn't seem like is has. How do we confirm it has run?

Q: We rolled the DST patch from the SUS in SMS, and got confirmation that it ran. However, when I go to a workstation that has reported success, it doesn't appear that the change has run. How can we confirm that it has run on a particular workstation?
A: To spot check systems you can run the TZEdit tool and examine affected time zones.