http://hl7.org/fhir/StructureDefinition/workflow-releaseDate|5.2.0

Indicates the date on which request or event resource that has a status of 'on-hold' or 'suspended' should be moved back to an active state.
NameFlagsCardTypeDescription & Constraints
Extension
0..1When to come off hold
 
extension
?..0
 
url
?..?
 
value[x] *
1..?
 
 
valueDateTime *
1..?dateTime