Lets you add offline calendars to the Calendar app, which are not synchronized and are accessible only on the device itself. Create the calendar in this app and it will then be available in the Calendar app.
Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.Download F-Droid
Version 1.8 (9) - Added on 2016-05-02
This version requires Android 2.2 or newer.
It is built and signed by the original developer.