set photo exif timestamp based on directory name

gistfile1.txt

for dir in */; do;
  year=`echo $dir | sed 's/\([0-9]\{4\}\).*/\1/'`
  month=`echo $dir | sed 's/[0-9]\{4\}\([0-9]\{2\}\).*/\1/'`
  echo "year $year"
  echo "month $month"
  exiftool -P -overwrite_original_in_place "-datetimeoriginal=$year:$month:01 12:00:00" "$dir"/*
done