Reset value in datetimefield

Question

Is there any way to reset the value to null when only the date or time is entered in a datetimefield? 
 
 Screenshots attached 
 
 1. Enter only the date in 'Fecha entrega en mano'

2. Click on CANCELAR and confirm

3. Click on EDITAR again

4. As can be seen in the screenshot, the previously entered value is displayed by default. Appian does not reset the value to null for datetimefields. However, for fields other than datetimefields, it does reset them and previously entered values do not appear.

Shubham Aware · Answer

Use a!save(local!myDateTimeVar, null()) in the Cancel action to clear the value explicitly, because a!dateTimeField() itself may keep the partial value.

Stefan Helzle · Answer

How do you manage the overall interface state? Is this the only information you might need to reset somehow? 
 In a dynamic interface where I switch between larger interface sections, I use additional saveInto statements in buttons to control the state of the data.

Harsha Sharma · Answer

datetime field stores the data entered in one of the fields internally, which we cannot reset. To clear it properly configure a!save(local!dateTimeValue,null) in the button that submits the form. 
 Additionally if cancel/submit button have any process flow that writes the data into record/data store entity, you can add and set datetime field value to null before that node as well so that if value is not proper it doesnt get saved.