#!/usr/bin/bash

echo "enter new year"
read year_new

for f in *.jpg *.JPG 
do

    # get original data
    meta=$( exiftool -s "-datetimeoriginal" "$f" |  sed 's/[^0-9]*//g' )

    # get meta data
    year=${meta:0:4}
    month=${meta:4:2}
    day=${meta:6:2}

    hour=${meta:8:2}
    minute=${meta:10:2}
    second=${meta:12:2}

    # make new date
    new=$(echo "$year_new":"$month":"$day" "$hour":"$minute":"$second")

    # change all dates (don't make backup)
    exiftool -overwrite_original "-alldates=$new" "$f"

done