First in design view on the form, click on the calendar, view properties.
Click on the grey area to the right of the property (on updated). Click on
the 2 dots and choose Code Builder. When the code window opens. Type
Me.(whatever the name of the field you want the date value in) = Me.(name of
Calendar).Value
( Me.fieldname = Me.cal0.value )
Name of field Name of calendar
Then save and close. That should work. I do that all the time.
Sorry If I went into too much detail, but I'm not sure how much you know.
Penny
Hope this helps.