For Android 4.0+ only! The Android 2.2+ legacy version is deprecated and can be found on monthlycalendar.sf.net only. Sorry.
Stable alpha version. Write me (firstname.lastname@example.org) if you experience unwanted behaviour. Do NOT rate the app down because you think it is, well, in alpha.
New in 0.0.8:
* Removed ads completely.
* Consequently, also removed "Internet permission" requirement.
About the security permissions:
* Read and write calendar should be obvious
* Read contacts: Birthdays are displayed if so desired in settings