Android: For reasons unknown, Google removed the full Month view from Calendar on Android, opting instead for the condensed version seen above on the right. While Month view has always been clumsy, the new solution wasn't much better. Now the old one's back and Google has even improved it a bit.
For starters, you can now find your different views in the slide-out navigation panel on the left side, rather than a drop-down in the action bar. The quick month view can still be accessed from the action bar, but with one new feature: you'll now see colour-coded dots for any events on that day, rather than an opaque "Something is happening" grey dot. The update is rolling out now, but you can jump the line by downloading the APK from Android Police here.