Attention Google: LET ME CHOOSE
Google's Calendar app only displays a WEEKLY view when in landscape. View selection, in this post MONTH, is only possible, at least with my device, when in portrait and does not carry over to landscape.
The ability to select a view does not even seem to be available when in landscape. This is contrary to Google's and Android's general design approach of operator choice and more in alliance with Apple's we-always-know-what-is-best-for-you philosophy. There is always the chance that this is a design oversight. I hope that it is not a decision.
Samsung Note 4; Lollypop 5-0-; Google Now Launcher