From the Add or Edit Event page, select when and how you would like to be reminded. You may specify up to two separate reminders to occur anywhere from 5 minutes to 14 days before the event. Reminders can be sent to your email address, mobile device or Yahoo! Pager.

If you use one type of reminder frequently, go to the Reminder Options page and make it your default reminder.

Yahoo! Messenger Reminders
To use Yahoo! Messenger reminders, first make sure you have the latest Windows version of Yahoo! Messenger (Java versions currently not supported). To get your reminders, make sure you use the same Yahoo! ID to sign in to both Yahoo! Calendar and Yahoo! Messenger.