Jeez. I've been naming files more than forty years.
I'm not claiming expertise, just experience.
Now I start all file names [1] yymmdd because:
- It is probably a local maximum for six characters and sometimes file name length is severely constrained.
 - It sorts by name with most recent first and sorting by name is often a default.
 - Date is a pointer into a log/journal/diary/notebook with additional detail, and vice versa.
 - Sometimes, just knowing when I made something helps me remember what I did.
 - When file name length is not constrained, I can add detail to the file name after the date:
 - yymmdd-c when limited to 8 characters where c is a character
 - alternatively yymmddnn if numerals make more sense with limited characters
 - yymmdd description where file name length is less limited.
 
But by far knowing how to meaningfully start a name is the most important reason. Naming things is hard and starting to name them is the hardest part. Certainty goes a long way...
...for me. Your mileage may vary.