Online Alarm Clock — 4:00 PM
10:10:00
Thursday, January 1, 2026
Alarm Armed for 4:00 PM (rings in calculating...)
⚡ Screen Wake Lock active • Loud continuous klaxon alarm (up to 15 minutes) • Keep this tab open.

Set Alarm for 4:00 PM

Pre-Set for 4:00 PM (16:00)•Audible Web Audio Buzzer Alarm•One-Click Turn Off & Snooze•Reliable In-Browser Wake Up

Best Bedtimes to Wake Up Refreshed at 4:00 PM

Waking up at the end of a 90-minute sleep cycle helps prevent grogginess. To wake up at 4:00 PM, aim to fall asleep at one of these times:

Full Recovery (6 Cycles)
7:00 AM
9 hrs of sleep
Recommended (5 Cycles)
8:30 AM
7.5 hrs of sleep
Minimum Rest (4 Cycles)
10:00 AM
6 hrs of sleep
Short Sleep (3 Cycles)
11:30 AM
4.5 hrs of sleep

Wake Up on Schedule at 4:00 PM with Your Web Browser

Never oversleep or miss an important deadline again. The TimerBox 4:00 PM Online Alarm Clock comes pre-armed to ring at exactly 4:00 PM in your local time zone. Great for power naps, afternoon focus reminders, lunch breaks, and shift transitions.

Featuring synthesized alarm beeps that cut through background noise, intuitive one-click alarm activation, automatic Screen Wake Lock support, and high-visibility time displays for bedside tables or work desks.

How to Set an Alarm for 4:00 PM

1
Confirm your pre-selected 4:00 PM alarm time or adjust the hour and minute in the time input.
2
Ensure the alarm is armed ("Alarm Armed" status badge active — or tap "Arm Alarm").
3
Ensure your device sound is turned on and tap "Test Sound" to verify your speaker volume.
4
When the 4:00 PM alarm triggers, tap "Stop Alarm" to silence the buzzer or "Snooze (+10m)" for 10 extra minutes.

Popular & Nearby Alarm Times

Frequently Asked Questions

Will the 4:00 PM alarm sound if my computer is sleeping?

Your computer and browser must remain awake for the 4:00 PM alarm to trigger. TimerBox automatically requests a browser Screen Wake Lock while armed, and we recommend disabling system sleep mode if using it overnight.

Does the alarm work if the tab is in the background?

Yes! As long as the browser window remains open, the 4:00 PM alarm will ring right on schedule.

Can I test the alarm sound beforehand?

Yes, tap the "Test Sound" button directly below the clock or toggle the volume control in the top toolbar to confirm audio playback.

Can I change the alarm time from 4:00 PM?

Yes, you can update your target alarm time at any moment using the time picker or jump to another preset time below.

Ready for Your 4:00 PM Alarm?

Scroll up to verify or adjust your 4:00 PM wake-up alert with zero setup required.