title: Send push notification after time interval
body: <p>I want to send a <a href="https://developer.mozilla.org/en-US/docs/Web/API/Push_API" rel="nofollow">HTML push notification</a> in a specific time interval (e.g. every evening). Is this possible <strong>without a server</strong>? Can I set a timeout in my ServiceWorker, which then creates the push notification?</p>