How to sort a Diary?

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http://unix.stackexchange.com – Diary has entries with month and day, no years, in the format %D_%M.tex but index in wrong order because of wrong sorting and poor filename -format. How should I call my Diary -entries to get them sortable by sort -command (from old to new or the reverse)? The key is radix -sorting, notice this discussion here, but it is still open which one of them. By which Radix -sorting algorithms and when? What are the pros-and-cons? STOP here if you know sorting -- the following part is for those wanting to reproduce the diary with small working example and intended output Wrong Output $ ls Day (HowTos)