How the dates are magic stringed in VSI response?
By design, DevTest use the Magic Date functions doDateDeltaFromCurrent() and doDateDeltaFromRequest() when magic string the dates in Request and Response. Here is how the VSI->Response is created with the date functions.
. doDateDeltaFromCurrent() - When there is no date in the request but the response has a date then VSI creates a magic date using doDateDeltaFromCurrent.
. doDateDeltaFromRequest() - When a Date is in the Request and the same Date is also in the Response then VSI creates a magic date using doDateDeltaFromRequest.
Information is available in section Magic Dates of the documentation of the version of DevTest you are running..