Gets the JSON string value of the named property as a DATETIME-TZ.
Return type: DATETIME-TZ
Access: PUBLIC
Applies to: Progress.Json.ObjectModel.JsonObject class
A JsonError is raised if:
"YYYY-MM-DD[THH[:MM[:SS[.sss]]]]Z"
Or this format:
"YYYY-MM-DD[THH[:MM[:SS[.sss]]]](+|-)HH:MM"