A reminder did not arrive

1. Check the event has a reminder. Open the event and look at Notify. It should list a time and a channel. The event's type does not tell you this: a Reminder-type event with an empty Notify sends nothing.
2. Check the event's time. A reminder counts back from the event's start, in the event's time zone.
3. For Push, open Settings → Notifications and check that this browser or your phone is set up. Then check that your device allows notifications from the browser or app, and that a focus or do-not-disturb mode is not on.
4. For Email, check the address in Settings → Notifications and look in your spam folder. If delivery is paused, choose Review.

When does not fall back from Push to Email. A Push reminder that cannot be delivered is not sent another way.

If everything is set up and reminders still do not arrive, send support the event's time and time zone, the reminder time you expected, the channel, and your device.