Issue #1259870, Reinstate the test for a missing date argument for the pager and add to the message a warning that the problem could be that the default date is missing from the argument.

Issue #1305938 by kristiaanvandeneynde and KarenS, Make sure the overlapping items work correctly with half hour grouping, and don't allow it for custom time groupings.

Issue #1260380, Some items showing up in wrong time periods because wrong value is used to create the start date bucket.

Issue #1383782 by googletorp, Check if module_exists('taxonomy') before creating taxonomy strip options.

Follow up to #1323280, we should only omit minutes from the heading if the grouping has no minutes in it.

Issue #1230500, The calendar row logic was failing if there was more than one date field in a node due to a bad return value. Also fixed some errors caused by not returning an empty array for missing values.

Issue #1236610, Allow the calendar style to work with any row plugin that extends the calendar_row_plugin.

Issue #1315328, Default calendar had date arguments in the master, which affected the upcoming view.

Issue #1268780 by drewkeller,  in calendar_preprocess_date_views_pager() seems to be incorrect when base_path() is /

Issue #1265616, Rework the calendar display links into tabs and the Add link into an action item, and add hook_calendar_links_alter().

Issue #1261478 by stevector and KarenS, Reconfigure the back/next buttons into item lists so Views ajax pager works right.