I have an application, querying ArcGIS Server layer date field ( data is in SDE 10.1 with SQL Server Enterprise), it worked perfectly until I updated to ArcGIS 10.2.
The same query runs OK on ArcMap and any other no GIS tools, but not ArcGIS Server Silverlight App, ArcGIS Server REST API, always get the error : Unable to complete operation.
In the same App, I also use WCF to for other date queries ( not related to GIS API), it is fine.
It seems the ESRI ArcGIS REST API ( 10.2) has some issue here, anybody has such problem?