You can sort data by dates in Microsoft Excel and Excel Online. Learn how to sort all the columns according to date column using this tutorial.

Now that the colors are defined by SALES, you can use them to sort by BOOK, AUTHOR, LANGUAGE, or PUB DATE, and, for example, view authors with sales of Cyan, which denotes the group with sales ...

If the Excel Date Filter is not grouping by month, enable grouping dates in the AutoFilter menu, set dates in the proper format, etc.