Set Alarm for 12 PM
12:00 in 24-hour format · Rings with sound in your browser
12:00 PM
Alarm sound
Snooze duration
About the 12 PM Alarm
This page sets an online alarm for 12 PM (12:00 in 24-hour format). The alarm activates automatically when the page loads and will ring at exactly 12 PM local time with your chosen alarm sound. 12 PM falls in the afternoon, making it a common time for lunch break reminder.
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 12 PM Alarm
- · Lunch break reminder
- · Midday medication reminder
- · Afternoon meeting preparation
- · Reminding yourself to eat during busy days
12 PM Time Details
| 12-hour format | 12 PM |
| 24-hour format | 12:00 |
| Period | afternoon |
| Hour (24h) | 12 |
| Minute | 0 |
Frequently Asked Questions
How do I set an alarm for 12 PM?
This page automatically sets the alarm to 12 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 12 PM in 24-hour time?
12 PM is 12:00 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.