Connecting to a non-Appian managed database table and getting incorrect date & time

I'm accessing a database belonging to another tool.  In order to retrieve certain data items we've constructed a data type and a data store and are using query Entities to retrieve information.  However, this system stores date and time values in the local time of the users of the application.  

Unfortunately, when I retrieve them into Appian, it treats all the values as if the value was stored in GMT and presents it to me as if it was in my timezone when displayed.  

Is there a simple way to convert the data back to the original timezone?

R