Abstract: Systems, devices, and methods are provided herein for the handless operation of a door. Illustrative examples of a system disclosed herein include a user interaction assembly configured to be disposed at a bottom edge of the door, the user interaction assembly configured to generate a signal, a push-lock assembly configured to attach to a door handle external to a mounting rose of the door handle, and the push-lock assembly configured to receive the signal from the user interaction assembly and translate the signal into rotational movement configured to operate the door handle.