Birthday Calendar

Get a birthday calendar for all your social networks right inside Google
Calendar. Supports Facebook, LinkedIn, Xing, Skype and all other apps which sync
contacts with your Android device. Enable reminder alarms and decide which
contacts you want to see. You'll get notifications for all of them.

Features:

* Birthdays and anniversaries for all your contacts
* Customizable reminders (same day, one day in advance, ...) and the calendar color
* Hide the app icon after setting it up so that it doesn't get in your way
* Tablet support

Based on https://f-droid.org/packages/org.birthdayadapter.