Enter times in 12-hour format with AM/PM. Casing and spacing are flexible.
Accepted: 10:00 PM, 7 AM, 10:30pm, 7 a.m., 11.45 PM.
24-hour input (like 22:00 or 07:00) is not accepted — the Register button will stay disabled until both fields use AM/PM.
End of day must fall between 6:00 PM and 11:59 PM. Wake-up must fall between 4:00 AM and 11:00 AM.