Set Alarm for 3 PM
15:00 in 24-hour format · Rings with sound in your browser
3:00 PM
Alarm sound
Snooze duration
About the 3 PM Alarm
This page sets an online alarm for 3 PM (15:00 in 24-hour format). The alarm activates automatically when the page loads and will ring at exactly 3 PM local time with your chosen alarm sound. 3 PM falls in the afternoon, making it a common time for afternoon meeting or appointment.
The alarm works entirely in your browser — no app download or account is needed. It continues running even if you switch to another tab, and the browser tab title shows a countdown so you always know how long until it rings. When the alarm fires, you can dismiss it or snooze for 1 to 30 minutes.
Common Uses for a 3 PM Alarm
- · Afternoon meeting or appointment
- · School pick-up reminder
- · End-of-workday alert
- · Taking an afternoon break
3 PM Time Details
| 12-hour format | 3 PM |
| 24-hour format | 15:00 |
| Period | afternoon |
| Hour (24h) | 15 |
| Minute | 0 |
Frequently Asked Questions
How do I set an alarm for 3 PM?
This page automatically sets the alarm to 3 PM when it loads. If you've cancelled it, click "Set Alarm" to reactivate. You can customize the alarm sound, label, and snooze duration before setting it.
What is 3 PM in 24-hour time?
3 PM is 15:00 in 24-hour (military) format. The 24-hour clock runs from 00:00 (midnight) to 23:59. Hours after 12:59 PM are numbered 13 through 23.
Will the alarm ring if I'm in another tab?
Yes. The alarm uses the Web Audio API which plays sound even when the tab is in the background. The browser tab title also updates with a countdown, and a browser notification appears if you've granted permission.
Can I change the alarm sound?
Yes. Cancel the current alarm, choose from 7 tones (Classic, Gentle, Urgent, Digital, Bell, Chime, or Pulse), use the Test button to preview, then set the alarm again.