Online alarm clock
- Your local time:
- Open: Home — Your local time: — —
- This device’s time zone rules are out of date. This site applies the updated rules.
Syncing • Using device time Note: the value above does not include device-clock drift accumulated after calibration. This is generally no more than ±1 ms per minute, but the actual rate varies by device. The lowest round-trip latency measured between your browser and the current time-service node. It is typically affected by physical distance, network routing, access quality, and current congestion. Network latency describes the measured connection. The time-error range is calculated separately; it is not half the latency. This error does not show whether your device clock is fast or slow.
Set a one-time alarm using Time.ms calibrated time or your device clock, with sound, visual reminders and a five-minute snooze.
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Rings in
No alarm set
Alarm time
Time source:
Current time
Device time
Syncing • Using device time Note: the value above does not include device-clock drift accumulated after calibration. This is generally no more than ±1 ms per minute, but the actual rate varies by device. The lowest round-trip latency measured between your browser and the current time-service node. It is typically affected by physical distance, network routing, access quality, and current congestion. Network latency describes the measured connection. The time-error range is calculated separately; it is not half the latency. This error does not show whether your device clock is fast or slow.
Keep this page open and your device awake. Background tabs or sleep may delay the alarm. Refreshing or leaving cancels it.
If the entered local time occurs twice, the earlier occurrence is used. Once set, the alarm keeps the same instant even if the device time zone changes.