excessive birthday reminder notifications My birthday reminders started appearing more frequently about a month ago. Usually they only appear once per day, but for example I have been using my laptop for the past 20 minutes and they have appeared three times. This is very annoying.

How do I prevent this from happening?

UPDATE:

As suggested by Martin, here is some more info.


OS X 10.8 (Mountain Lion)
The reminders are through Notification Center (from Calendar).
I am connected to iCloud and have my contacts to be imported from Facebook.
not connected to yahoo or google.
Check your calendar enable all calendar and see if you have multiple records of birthdate. I had same issue duplication of birthdate in contacts, facebook account &amp; gmail. And also check remiders if it is set for more than once. I think by default it should be one reminder on date. 

And finally click on close not snooze :)