Let Yahoo! Calendar notify you when an event is coming up. Set a reminder!

On the Add or Edit Event page, choose WHEN and HOW you'd like to be reminded -- twice, if you want! Yep, you can set two separate reminders to get your attention anywhere from 5 minutes to 14 days before the event.

Send reminders to an email address of your choice, your mobile device, or Yahoo! Messenger.

Email Reminders
In the Reminders area:

• Select "Send Reminders".
• Check the box beside "Email", and from the pull-down menu, select the email address at which you'd like to get your reminders.
• Click Save. That's it!

Mobile Device Reminders
Make sure you've registered your device with Yahoo! Mobile.

• Once that's done, all you need to do is check the box beside "Mobile"! :o)

Yahoo! Messenger Reminders
First, make sure you have the latest Windows version of Yahoo! Messenger.

• Caution: you WON’T be able to get Calendar reminders via Yahoo! Messenger for the Web (the no-download version of Yahoo! Messenger).
• Make sure you use the same Yahoo! ID to sign in to both Yahoo! Calendar and Yahoo! Messenger.
• And this is important: make sure you’re logged in to Yahoo! Messenger at the time you've set to receive the reminder(!).

A reminder appears as a small Yahoo! Messenger pop-up window. To change when you receive your reminder, or to turn it on or off, click the event in your Yahoo! Calendar and scroll down to the Reminders section.

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