A system, device, and method for adjusting temporal settings of an electronic plumbing controller are provided. A removable time adjustment device includes at least one input device, at least one interface configured to communicate with the electronic plumbing controller, and at least one controller configured to set or adjust, on the electronic plumbing controller through the at least one interface, at least one temporal setting for the at least one plumbing fixture based at least partially on user input from the at least one input device.