See birthdays and other events from your contacts in your calendar.
About this app
Birthday Adapter provides birthdays, anniversaries, and other events from your contacts into your Android calendar. Unlike other apps, it integrates with your system calendar, so you can see all your contact dates alongside your other events.
FEATURES * Integration: See your contacts' birthdays directly in your favorite calendar app alongside your daily schedule - no manual lists or double entries required. * Age Display: With the age automatically being added to every event, you always know which milestone is ahead. * Beyond Birthdays: Sync any custom-labeled date from your address book - perfect for keeping track of your contacts' anniversaries or their children’s and partners' birthdays. * Background Sync: Your calendar stays in sync with regular updates in the background. * Filtering: Choose which accounts or contact groups you want to see in your calendar. * Reminders: Set as many reminders as you need for your events. * Jubilee Markers: Spot major milestones and big anniversaries. * Customization: Personalize event titles and choose which event types should trigger a notification. * Personalization: Use the color picker to style your birthday calendar to match your personal preference.
PROBLEMS If you have problems with this app, please report them on the following website: https://github.com/SufficientlySecure/birthday-calendar/issues
TRANSLATIONS Help translating Birthday Adapter on https://hosted.weblate.org/engage/birthday-adapter/
SOURCE CODE https://github.com/SufficientlySecure/birthday-calendar
LICENSE GPLv3
KEYWORDS birthday calendar, birthday adapter, calendar integration, birthdays, events, special dates
OPEN SOURCE ALTERNATIVE TO EboBirthday, Birthdays, TKBirthdayReminder, Birthday Widget
Licensed under GPL-3.0-only, by Matthias Heinisch & Dominik Schürmann.
What's New in v3.13.1
Imported from the F-Droid repository index.
- 3.13.1
- * Add translation: Tamil
- - Update translations: Vietnamese, French
- - Update dependencies
Version history
Jun 25, 2026 · 3.5 MB · Android API 28–36 · code 31301
Imported from the F-Droid repository index.
- 3.13.1
- * Add translation: Tamil
- - Update translations: Vietnamese, French
- - Update dependencies
SHA-256 ef0784a74eb52271009ca880c735d591c60ac9c36083181cd67e4c0053e8a1f5
Jun 11, 2026 · 3.4 MB · Android API 28–36 · code 31300
Imported from the F-Droid repository index.
- 3.13
- * Add link to open contact details from calendar events
- * Robustness improvement of purchase helper
- - Clean up main settings page, use switches instead of checkboxes
- - Add github page
- - Update translations
SHA-256 4a119700c6b2c817d3b92c90462bbd487dc48e657828418052841fea06148f1e
May 29, 2026 · 3.4 MB · Android API 28–36 · code 31202
Imported from the F-Droid repository index.
- 3.12.2
- * Add translation: Spanish
SHA-256 733e810f67f62842be221adb69b6fbe7dd0a1aef5be4262f8673e862f37887bd
Will it run on your device?
60%
- Targets newer Android builds, so legacy devices may be excluded.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be org.birthdayadapter is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 3.13 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Birthday Adapter first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Birthday Adapter, and a listing is removed when the evidence for it stops holding up.
Get Birthday Adapter
Every source we list for org.birthdayadapter is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
ef0784a74eb52271009ca880c735d591c60ac9c36083181cd67e4c0053e8a1f5
Signing certificate
b4d50046259eb0c5cf0f6a2ebbf9db465e6e55962c36a5225fc88e33e6fc3d46
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.