dateTime

primitive type

Base StructureDefinition for dateTime Type: A date, date-time or partial date (e.g. just year or year + month). If hours and minutes are specified, a time zone SHALL be populated. The format is a union of the schema types gYear, gYearMonth, date and dateTime. Seconds must be provided due to schema type constraints but may be zero-filled and may be ignored. Dates SHALL be valid dates.

Official spec

Path	Card.	Type	Description & Constraints
dateTime	0..*	—	Primitive Type dateTime
.id	0..1	String	xml:id (or equivalent in JSON)
.extension	0..*	Extension	Additional content defined by implementations
.value	0..1	DateTime	Primitive value for dateTime