This article explains step by step how to upgrade GNOME Calendar to 3.22.1 in Ubuntu 16.10, 16.04, and 14.04 using GNOME3 Staging PPA. For your information, even in the latest stable Ubuntu 16.10 we have only the version 3.20 for GNOME Calendar. We can get the latest version by external repository, and that is what the PPA for. This article is written at 3 December 2016 with 3.22.1 version, so next time you may encounter this PPA version changed up to its maintainer.
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