No. The Calendar can not only show month and year; you'd have to find a custom Control for this, and I've never seen one. To simply display only the month/year of a Date Field, after leaving the Control, would be simple, if that would serve your purpose. You'd simply enter mm/yyyy in the Control's Format Property.
It all depends on exactly what you're trying to do, here.
Linq ;0)>
The problem with making anything foolproof...is that fools are so darn ingenious!
All posts/responses based on Access 2003/2007