Set Alarm for 8:40 AM

The form is pre-filled for 8:40 AM — hit Set Alarm to start the live countdown. Pick a sound, add a label, and the alarm will ring at 8:40 AM local time.

No alarm set

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Set an alarm to start

How long until 8:40 AM?

8:40 AM is 08:40 in 24-hour time — the morning. Once set, the alarm display counts down to the next 8:40 AM in your local time zone, rolling over to tomorrow if it has already passed today.

When to go to bed for a 8:40 AM alarm

Sleep runs in cycles of roughly 90 minutes, and waking at the end of a cycle usually feels easier than being pulled out of deep sleep halfway through one. Allowing about 15 minutes to fall asleep, these bedtimes line up with a 8:40 AM wake-up:

11:25 PM 6 cycles · 9 h of sleep

12:55 AM 5 cycles · 7 h 30 min of sleep

2:25 AM 4 cycles · 6 h of sleep

3:55 AM 3 cycles · 4 h 30 min of sleep

Adults generally need 7–9 hours, so five or six cycles (highlighted) suit most people. Treat these as a starting point — cycle length varies from person to person and through the night.

Nearby alarm times

8:10 AM Set alarm → 8:20 AM Set alarm → 8:30 AM Set alarm → 8:50 AM Set alarm → 9:00 AM Set alarm → 9:10 AM Set alarm →

Tips for using a 8:40 AM alarm

Keep this browser tab open. The alarm runs entirely in your browser and pauses when the tab is closed.
Click Test once to unlock audio playback in your browser before the alarm fires.
Use the snooze button to delay the alarm by five minutes if you need a little more time.
The alarm time is stored in your browser's local storage so it survives a page reload.

Looking for a different time? Set a custom alarm with any minute value.