Birthdays into Calendar (Free)

Description
Shows birthdays, anniversaries, and other dates from your contacts as events in your favorite calendar app. It supports all calendar apps available for Android, such as Google Calendar, Samsung Calendar, HTC Calendar, and other calendar apps which can be installed via Google Play.

To my knowledge, this is the only app providing your contacts' birthdays as events displayed in a calendar app of your choice. Other birthday apps do not integrate with Android's calendar database!

This is the free version of Birthday Calendar.
This version contains every feature of the full version, except reminders. It is ad-free and does not require Internet access.

Known bugs
• Reminder do not work correctly on Android 2.3
• Devices with Android 4.1 and all version of Samsung Galaxy S4 have a bug which causes Birthday Adapter to disable after reboots. Please install additionally:
https://play.google.com/store/apps/details?id=org.birthdayadapter.jb.workaround

Features
• Total integration of birthdays, anniversaries, and other events from Android's contacts as a calendar
• Color picker for the birthday calendar
• Event Reminders (Only in full version!)
• Filter contact events based on account

Source code/Bug reports/Translations
https://www.schuermann.eu/android/

License
GPLv3