SET ALARM FOR 21:45
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Current Time
Your Alarms
You don't have any alarms yet.
You've landed on the page to set an alarm for 21:45. The widget above already has the time loaded. All you need to do is pick the sound you like, test it with the "Test sound" button, add a label if you want, and press "Set alarm". That's it.
How to set the alarm for 21:45
- Pick the sound you like in the selector above. You have 10 options, from classic beeps to soft piano. Press "Test sound" to preview it.
- Add a label (optional) to identify the alarm: "Work", "Medication", "Pick up the kids"…
- Press "Set alarm". The alarm will appear in your list with a live countdown. When the time comes, it rings even if the tab is in the background.
Why set an alarm for 21:45?
At night, alarms do a different job: reminding you it's time for bed. Yes, an alarm to go to sleep. Setting it at 21:45 helps you keep a fixed bedtime, one of the most solid recommendations in sleep science. Turn off screens, dim the lights, and let the alarm tell you when.
Frequently asked questions
Does it work without an internet connection?
Yes, once the page has loaded, the alarm works completely offline. The clock uses your device's local time and the sounds are generated with the browser's Web Audio API.
Should I set an alarm to go to bed?
Yes, sleep experts recommend it. A bedtime alarm is as important as the wake-up one. Keeping a fixed bedtime improves rest quality more than sleeping many hours on irregular schedules.
How many sleep cycles do I need?
A sleep cycle lasts about 90 minutes. The ideal is 5 cycles (7.5 hours) or 6 (9 hours). If you set the wake-up alarm at 7:00, count backwards in 90-minute blocks: 5:30, 4:00, 2:30, 1:00, 11:30 PM. Going to bed near one of those times helps you wake at the end of a cycle instead of in the middle of deep sleep.