The timestamp read-only property of the Notification interface returns a DOMTimeStamp, as specified in the timestamp option of the Notification() constructor.

The notification's timestamp can represent the time, in milliseconds since 00:00:00 UTC on 1 January 1970, of the event for which the notification was created, or it can be an arbitrary timestamp that you want associated with the notification. For example, a timestamp for an upcoming meeting could be set in the future, whereas a timestamp for a missed message could be set in the past.

Note: This feature is available in Web Workers.


var timestamp = Notification.timestamp;


A DOMTimeStamp.


The following snippet fires a notification; a simple options object is created, then the notification is fired using the Notification() constructor.

var dts = Math.floor(;

var options = {
  body: 'Do you like my body?',
  timestamp: dts

var n = new Notification('Test notification',options);

n.timestamp // should return original timestamp


Specification Status Comment
Notifications API
The definition of 'timestamp' in that specification.
Living Standard Living standard

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 50 No support No support 37 No support
Available in workers 50 41.0 (41.0) ? 37 ?
Secure contexts only 62 ? ? 49 ?
Feature Android Webview Chrome for Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile
Basic support No support 50 No support No support No support 37 No support
Available in workers No support 50 41.0 (41.0) ? ? 37 ?
Secure contexts only No support 62 ? ? ? 49 ?

See also

Document Tags and Contributors

 Contributors to this page: jpmedley, dgashmdn
 Last updated by: jpmedley,