On bubble.io inputs, you have the ability to check a box that says "enable auto-binding", and it will allow you to have the input automatically saved to the parent element, based on what field you use for the input.

If you want to make a version of the data that is only saved at the end of the day, just make a temporary object that the data is auto-bound too, and then at the end of the day, copy that object as the permanent object.