This is the original Google calendar released for Android 4.4. Google's current calendar is different - better in some ways but it has non-intuitive horizontal scrolling in the month view.
We no longer support this app. You can use it at your own discretion, but we are not responsible for any new operating system changes by Google that may affect your calendar. This calendar 4.4 version is for people who explicitly want to use the older calendar version and we do not guarantee that new changes by Google will allow this calendar to continue to work.