Wake me up in 15 hours 38 minutes. Set timer for 15 hours 38 minutes. Set the alarm for 15 hours 38 minutes from now. It is a free and easy-to-use countdown timer.
Set this 15 hours 38 minutes timer and let the countdown start. Use it to control the time limit of any activity and be notified when that limit has been reached. When the countdown stops, an alarm sound will ring.
Start 15 hours 38 minutes timer.