Is it not possible to Sort Dates in Excel Reports?

I see you are also curious if it's possible or not to sort the dates of your Excel Reports.

That is something that has to be done outside of Jotform currently.

Depending on the Spreadsheet Software you are using usually there is some sort of Sorting Function offered for most to allow you to sort your listed data.

In this case for Excel Reports Spreadsheet that is obtained Office is equipped with a Sorting Option to do this for you.

Please see https://support.office.com/en-us/article/Sort-by-dates-60baffa5-341e-4dc4-af58-2d72e83b4412 for details about how to do this with MS Office in your Spreadsheet.