How can I hide my birthday and prevent Facebook from notifying my friends when I have a birthday?
I tried "Settings -> Privacy", but it only gives very general settings - there is nothing specific about birthday.
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Sign up to join this communityYou can change who can see your birthday by adjusting the audience.
Go to your profile and click About. On the left pane, click Contact and Basic Info.
There are 2 audience selectors next to your birthday (under Basic Information):
one for the day and month
one for the year
Friends won't get a notification about your upcoming birthday if you don't share the day and month with them. Click Edit and just choose "Only Me" next to the day and month, and your friends shouldn't get notifications about your birthday after you save changes.
For convenience, the following is a screeny of the related section: