Set Alarm for 12 am
An alarm pre-set for 12 am. It will ring .
Keep this tab open for the alarm to ring — browsers can't fire sound while a tab is fully closed.
About a 12 am alarm
A midnight alarm marks the start of a new day. People use it for time-sensitive launches, ticket releases, New Year countdowns and shift handovers, and it is also the moment when many UK deadlines roll over to the next date. Because it falls exactly on the hour, this alarm lines up with the pips on BBC radio and with most train and bus departures, which makes it the easiest time to remember and to coordinate with other people. It is also the time most calendar reminders default to, so it rarely clashes with a meeting that starts on the half hour.
In London the sun is already up at 12 am in none. It is still dark, or already dark, at that time in every month.
When to go to bed for a 12 am alarm
Sleep runs in roughly 90-minute cycles, and waking at the end of one tends to feel easier. These bedtimes include about 15 minutes to fall asleep.
- Bed at 14:45 for 6 cycles (9 hours of sleep)
- Bed at 16:15 for 5 cycles (7.5 hours of sleep)
- Bed at 17:45 for 4 cycles (6 hours of sleep)
Frequently asked questions
What time should I go to bed to wake at 12 am?
Allowing about 15 minutes to fall asleep, bedtimes of 14:45 (9 hours), 16:15 (7.5 hours) or 17:45 (6 hours) line up with 90-minute sleep cycles.
Will the alarm ring if I close the tab?
No. Keep this tab open, in the background is fine, and turn the volume up. The alarm uses your device's own clock.