Windows Explorer folder arrangement

Hi- I recently upgraded to Windows 10 and when I am viewing my photo library in Windows Explorer, I can no longer get the photos grouped by month. The "sort by" and "group by" menus are identical (name, date, type, size, ascending, descending, more) as opposed to how it was in my previous Windows version, which I think was Windows 8. I am trying to sort by date, which is fine- I can still do that. After that I am trying to group by month. The old "group by" menu had this option. It makes working with the photos a million times easier and faster. I have 25,000 photos on my machine and I use them often. I can't imagine that this feature is no longer available. Does anyone know where it can be found? Without that option I honestly can't use Windows Explorer anymore. Thanks!