Well, at least in my dolphin, if you order by date, the folders are sorted by the date of the file with the latest modifyed date inside it. If you simply order by date it will sort the way you want if the files inside are from different months. If the files does not match the date you want, you can simply use touch to modify the last modifyed date for the one you want.
Edit: Sorry, didn't see that it was marked solved. At least the solution is here now.
Last edited by Marcelo_Belfalas; 04-27-2013 at 05:47 PM.