Alarm for 11:30 PM
Set a free online alarm for 11:30 PM. This page opens with the alarm time already filled in as 11:30 PM — just press Set alarm and keep the tab open. It rings with a built-in sound at 11:30 PM. No download, no signup.
Common uses
- A wake-up alarm
- A reminder before an appointment
- A nap or break alarm
- A medication or call reminder
How to set an alarm for 11:30 PM
- The time is already filled in as 11:30 PM.
- Add an optional label such as "Wake up" or "Meeting".
- Press Set alarm. It appears in the list below.
- Leave this tab open. The alarm rings at 11:30 PM — press Stop to silence it.
What time is 11:30 PM?
11:30 PM is written 23:30 in 24-hour (military) time. It falls 23 hours 30 minutes after midnight — about 98% of the way through the day. From 11:30 PM it is 30 minutes until midnight.
Using 11:30 PM as a bedtime cue? If you're asleep within about 15 minutes, five full 90-minute sleep cycles (7½ hours) end around 7:15 AM, and six cycles (9 hours) around 8:45 AM.
Why people set a 11:30 PM alarm
- A last medication of the day, taken at the same time each night.
- Catching a nightly news bulletin, episode drop or live stream at 11:30 PM.
- Putting the dishwasher or washing machine on cheap-rate overnight power.
- A bedtime alarm — a nudge at 11:30 PM to start winding down instead of doom-scrolling.
FAQ
Does the alarm ring if I close the tab?
No. The alarm runs in your browser, so the tab must stay open. You can minimize the window, but don't close the tab.
Are my alarms saved?
Yes, they're stored locally in your browser (localStorage). They are not sent to any server.
Why is there no sound at first?
Browsers block audio until you interact with the page. Press a button once and the alarm sound will work.
What is 11:30 PM in 24-hour time?
11:30 PM is 23:30 in 24-hour notation — add 12 to the hour for PM times (11 + 12 = 23).
How far through the day is 11:30 PM?
11:30 PM is 23 hours 30 minutes after midnight, which is about 98% of a 24-hour day.
Can I set other alarms alongside 11:30 PM?
Yes. Add as many times as you like — each alarm appears in the list below and rings independently, so 11:30 PM can be one of several.