When you export your logs to Excel, the first column has a date in it. However, this date does not contain a year. Sorting by date has become impossible.

How to reproduce:

Navigate to Site administration > Reports > Logs and select “Standard log” from the dropdown and click “Get these logs”. If that option is not available then you are already viewing the standard log by default.

Under the “Download table data as” label, select the Excel format and click “Download”. Open the downloaded file and verify that the data in the file, including the headers, match the data on the page and that the date column does not contain a year.