Currently the Date Picker and Time Picker along with the new Date Time Picker have a placeholder text on them like month/day/year which pushes the material UI label on top of the input. The rest of my inputs have the label inside the input until a value is inserted. Is there anyway to remove that placeholder from these pickers? I feel it takes away from the design of my website to have some inconsistency with the inputs when you open a form with no data in it. For now we implemented a placeholder of --/--/---- but would prefer it to be like the Order Number above.