Describes the cause and action for error messages.
Error Message(English)：
pivot unable to group dates
Excel - pivot table does not group dates - Super User
https://superuser.com/questions/1125762/excel-pivot-table-does-not-group-dates
microsoft excel - Pivot table grouping by week ...
https://superuser.com/questions/1288137/pivot-table-grouping-by-week-cant-get-it-to-start-on-monday
pivot table - Cannot group field in Excel ...
https://superuser.com/questions/1263925/cannot-group-field-in-excel-pivottable
microsoft excel - "Cannot group that selection ...
https://superuser.com/questions/484616/cannot-group-that-selection-error-when-creating-pivot-table
microsoft excel 2007 - Grouping dates by week in ...
https://superuser.com/questions/174956/grouping-dates-by-week-in-a-pivot-table
How to Change Date Formatting for Grouped Pivot ... - Excel Campus
https://www.excelcampus.com/pivot-tables/grouped-date-field-formatting/
Why the Pivot Table Group Field Button is Disabled for Dates - Excel ...
https://www.excelcampus.com/pivot-tables/group-field-disabled/
Grouping Pivot Table Data. How to Group so you don't get: Cannot ...
https://www.ozgrid.com/Excel/grouping-pivot-tables.htm
Unable to automatically group dates in Excel 2010 Pivot Tables ...
https://stackoverflow.com/questions/30380743/unable-to-automatically-group-dates-in-excel-2010-pivot・・・