How to get date from filename?

Question

bash

exiftool can write the creation date to exif using data from the file name, and it understands quite a few formats. Is there any utility that can extract the date from the name and that does not work according to a template, but determines the date format itself?
Here is an example of such files:
2018-06-11 19.16.34.jpg
IMG_20170803_124145.jpg
Or is it possible to somehow force exiftool to write metadata to webp files?
PS: I repeat, the date must be obtained from the file name, not from its metadata. And not in a fixed pattern.

Answer 1

Here 's a script for jhead just to sort through the various names. Might come in handy...

Answer 2

bash has a stat command

[email protected]:/storage# stat /script/xxx.file 
  File: /script/xxx.file
  Size: 1030      	Blocks: 8          IO Block: 4096   regular file
Device: 801h/2049d	Inode: 45875204    Links: 1
Access: (0777/-rwxrwxrwx)  Uid: (65534/  nobody)   Gid: (65534/ nogroup)
Access: 2018-06-12 21:00:01.308455845 +0700
Modify: 2018-06-08 14:36:08.429939719 +0700
Change: 2018-06-08 14:36:08.429939719 +0700

Usage example
Reconcile the last modification of a file with today.

#!/bin/bash
path=/xxx
if  
then echo 0
else echo 1 
fi

Answer 3

You can write an algorithm for parsing multiple patterns.
There is no single program that will automatically parse something like
YYYY-MM-DD hh.mm.ss.jpg
IMG_YYYYMMDD_hhmmss.jpg
.
BUT if you go through all your files, maybe there are only 3-4 formats, for parsing which a script in a couple of lines is enough.