A family of Microsoft relational database management systems designed for ease of use.
You haven't answered my first two questions, but I take it from your reply that the control is named Date of Rotation, in which case you have a circular reference. You have two options:
1. Rename the control to something else, e.g. txtDateOfRotation.
2. Bind the control to the Date of Rotation column and set its Format property to mmmm.
Both depend on the answer to my first question being yes.