Four in the morning is the domain of early shifts, long-haul flights and people chasing quiet hours before the world wakes up. The alarm below is already set — just press Set Alarm and leave the tab open.
Waking at 4 AM only works if you protect the other end of the night. To get a full seven hours you need to be asleep by 9 PM, which means starting your wind-down around 8. Most people who fail at a 4 AM start fail because they kept their old bedtime, not because the hour itself is impossible.
Work backwards from 4:00 AM and the bedtime you need becomes obvious. Allow ten to fifteen minutes on top for actually falling asleep:
| If you want… | Bedtime |
|---|---|
| 9 hours of sleep | Be asleep by 7:00 PM |
| 8 hours of sleep | Be asleep by 8:00 PM |
| 7 hours of sleep | Be asleep by 9:00 PM |
| 6 hours of sleep | Be asleep by 10:00 PM |
If a call, shift or broadcast is scheduled for 4:00 AM Eastern, here is the equivalent local time elsewhere in the United States — useful before you set an alarm for something happening in another state:
| US time zone | Local clock time |
|---|---|
| Eastern (ET) | 4:00 AM |
| Central (CT) | 3:00 AM |
| Mountain (MT) | 2:00 AM |
| Pacific (PT) | 1:00 AM |
Note that Arizona and Hawaii do not observe daylight saving, so their offset changes twice a year. Our world clock shows live local times with daylight saving applied automatically.
The time above is already set to 4:00 AM. Choose an alarm sound, press Set Alarm, and keep this browser tab open — you can carry on working in other tabs and windows. When 4:00 AM arrives VClock plays your alarm, flashes the display and changes the tab title so you cannot miss it.
Press Stop to silence it or Snooze for another nine minutes. Alarms are saved in your own browser, so refreshing does not lose them and nothing about your schedule is sent anywhere. For an alert after a length of time rather than at a clock time, use the online timer instead.
Half an hour either side is often all it takes to make a schedule work. Browse every preset time below, or open the main alarm clock to enter any hour and minute you like.
It is fine provided you get enough total sleep, which means an early and genuinely protected bedtime. The risk with very early alarms is not the hour itself but the chronic sleep debt that follows when bedtime does not move with it.
Get bright light immediately, move for a few minutes, and avoid sitting down in a warm room. Light is the strongest signal your body clock responds to, and at 4 AM you will need artificial light until sunrise.
The time is already filled in on this page. Choose an alarm sound if you like, press Set Alarm, and leave this browser tab open — VClock rings at 4:00 AM.
No. The alarm runs inside the page, so the tab must stay open. You can switch freely between other tabs and windows; just do not close this one or quit the browser.
Yes. When it rings, press Snooze and VClock creates a new alarm nine minutes later — 4:09 AM — exactly like a bedside clock.
Alarm Bell and Siren are the loudest and best for deep sleep. Chime and Soft Wake are gentler, which suits a shared room or a nap. Each sound previews when you select it.
Use the VClock timer for durations like 10 or 20 minutes rather than a fixed clock time.
Open the Timer