What is the fieldname to store a birthday for a contact entry?

As you can know, you can store data against a contact on Android phones. I am won开发者_如何学Cdering if there is a standard name to store a birthday against a contact?

alt text http://img130.imageshack.us/img130/7673/screenbirthday.png

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Birthday details are stored in the Event table (Android 2.0). You can check the java docs here for more details.