Change the accessed / modified (and created on mac if older) of a bunch of photos to sort by date

changedates.sh

#!/bin/bash

for f in *.jpg
do
  num=${f//[^0-9]/}
  secs=${num:0:4}
  mmss=$(printf '%02d%02d\n' $((10#$secs/60)) $((10#$secs%60)))
  touch -mt 20180528${mmss} $f
  touch -t 20180528${mmss} $f
done