Increment Date by 1

I have a date on cell K1. I have several macro buttons throughout the spreadsheet. I want the date on cell K1 to increment to the next date when any of the buttons are pressed.

I thought this would work.

Sub addOne()
    Range ("K1") + 1
End Sub

The macro buttons work just fine. I just want to add this ability by calling addOne() whenever I press any of the buttons.