8af1e6c02a47432e29426a11188b347194e927c3
Since February have 28 days sometimes when you add month to January, 29 icaltime_normalize() takes you to February, 29 which is actually, March, 1. The same happens for January 30 and 31.
Calendar is a calendar application for GNOME. Design is an ongoing effort, so is development. The wiki is [here][1] [1]: https://wiki.gnome.org/Design/Apps/Calendar
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