Filename date to EXIF date

gistfile1.txt

#!/bin/bash

FILES=$1*.*g
REGEX='.*(\d{4})-?(\d{2})-?(\d{2})(?>-|_|\s(?>at\s)?)(\d{2})(?>\.|-)?(\d{2})(?>\.|-)?(\d{2}).*'
for f in $FILES
do
	echo -n "$f:"
	date=$(echo "$f" | perl -ne 'print if m/'"$REGEX"'/' | perl -pe 's/'"$REGEX"'\..*/"$1:$2:$3 $4:$5:$6"/g')
	if [ -n "$date" ]; then
	    echo $date
            exiftool -AllDates="$date" "$f"
	else
	   echo "No Date"
	fi
done