To set an event reminder

Tap an event to view its details.

Tap Add reminder to automatically add a reminder for 10 minutes before the event. Tap it again to add additional reminders.

Tap the Time field to set the length of time before the event that you want to be reminded of it. Tap the Notification field to set how you want to be reminded (by Notification or by email).

When the time comes, you receive a notification about the event.

You can use Google Calendar on the web to configure additional reminder settings.