3441545 - CX_SY_CONVERSION_NO_DATE_TIME Conversion error for property '<>' at offset '<>'

POST Edm.DateTime fails with error like:

 <?xml version="1.0" encoding="utf-8"?>
<error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
<code>CX_SY_CONVERSION_NO_DATE_TIME/67AA6842BAA80B7DE10000000A15523C</code>
<message xml:lang="en">Conversion error for property '<>' at offset '<>'</message>
<innererror>
<application>
<component_id/>
<service_namespace>/SAP/</service_namespace>
<service_id>ZDATEPOST_SRV</service_id>
<service_version>0001</service_version>
</application>
<transactionid>A3CA087C537D0010E0065D6492457B1B</transactionid>
<timestamp>20240306073248.1617660</timestamp>
<Error_Resolution>
<SAP_Transaction>For backend administrators: use ADT feed reader "SAP Gateway Error Log" or run transaction /IWFND/ERROR_LOG on SAP Gateway hub system and search for entries with the timestamp above for more details</SAP_Transaction>
<SAP_Note>See SAP Note 1797736 for error analysis (https://service.sap.com/sap/support/notes/1797736)</SAP_Note>
<Batch_SAP_Note>See SAP Note 1869434 for details about working with $batch (https://service.sap.com/sap/support/notes/1869434)</Batch_SAP_Note>
</Error_Resolution>
<errordetails/>
</innererror>
</error> 

SAP Gateway

CX_SY_CONVERSION_NO_DATE_TIME, DATS, Conversion error for property , KBA , OPU-GW-COR , Framework , Problem