You may have noticed that in the newer versions of Excel, if you drag a date or time into the columns or rows, it automatically groups them into months or hours respectively. You can stop this happening either with a quick (but repetitive fix) or a permanent fix. Below how to turn off automatic date and time grouping in Excel Pivot Tables
As shown below, whether you want it or not, the dates are grouped in months.
Quick Fix to switch off the date grouping
The quick fix is to undo (CTRL + Z). This works because when you drag it in, Excel puts it in and groups it in 2 steps. You can Undo even though you didn’t do it.
Turn off automatic date and time grouping in Excel Pivot Tables
You can turn off automatic date and time grouping in Excel Pivot Tables by changing the default behaviour in the Options settings. Click on your FILE menu item and choose Options.
As shown below, in the DATA section choose to ‘Disable automatic grouping of Date/ Time columns in Pivot Tables.