start/end time defines the start and end times for calendar screens. if the time slots you select do not fit on one screen, you can tap
alarm preset automatically sets an alarm for each new event. the silent alarm for untimed events is defined by minutes, days, or hours before midnight at the beginning of the date of the event.
alarm sound sets the tone of the alarm.
remind me defines how many times the alarm will occur after the initial occurrence. the choices are once, twice, 3 times, 5 times, and 10 times.
play every defines how often the alarm sounds. the choices are minute, 5 minutes, 10 minutes, and 30 minutes.