An eForm may have a date and/or time associated with it known as its eForm date. You can set up the eForm date to be entered by the user, or to be a derived value. An eForm date may have its own format and validation conditions.
If you set an eForm to be a visit eForm, its eForm date question will be the visit date.
In Data Entry, once an eForm date has been entered, it appears on the schedule underneath the eForm icon. If an eForm has a user-entered date, the eForm cannot be saved until a valid date has been entered.
Note that the eForm date question is always automatically made optional.