How to Convert Dates to Years in Excel. When you use Microsoft Excel to store and analyze business data, your workbooks and worksheets often contain date information. Although your original data ...

If you need to calculate dates in your spreadsheets, Excel uses its own unique system, which it calls Serial Numbers. Every date (month, day, year) and time (hour, minute, and second) has an ...

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