How do I know if my birthday on Facebook is going to be visible to others?

[Net World]

To adjust how your birthday appears to your friends, click Edit (Update Info) button along the top of your profile (timeline) and find the Basic Info section. From here, you have two different ways to control your birthday visibility:

Pick who can see your birthday. Choose an audience from the inline audience selector on the far right.
Choose which parts of your birthday your audience sees. Use the dropdown under your birthday fields to choose. You can display your full birthday, or just the month and day, or you can hide your birthday completely.

Note: If you hide your birthday completely, your friends won't receive reminders when it's approaching. If you still want them to receive these reminders, you will need to at least make the month and day visible to your friends.