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

In Microsoft Excel, learn how to report time values by the hour using the underlying date serial value.

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.

How to create a grouped PivotTable in Excel Grouping is what Excel’s PivotTable objects do, and it’s easy to summarize groups of data using any number of functions.