~U[YYYY-MM-DD HH:MM:SSZ] — date and time separated by one literal space (not T, unlike @datetime/RFC 3339), Z mandatory.
~U[YYYY-MM-DD HH:MM:SSZ]
T
@datetime
Z
text between ~U[ and ].
~U[
]
~U[YYYY-MM-DD HH:MM:SSZ]— date and time separated by one literal space (notT, unlike@datetime/RFC 3339),Zmandatory.