Script to shift the timestamp of file.

fileTimestampShift.sh

# source: https://morimori.tokyo/2015/10/adjusting-timestamps-from-a-gopro/
# 
#!/usr/bin/env bash

FILES=$(ls *.MP4) # FILES=$(ls *.{JPG,MP4})

for filename in $FILES
do
	# Offset is 974 days 10 hours 39 minutes
	NEWDATE=$(date -j -v+974d -v+10H -v+39M -f "%m/%d/%Y %H:%M:%S" "$(GetFileInfo -m $filename)" +"%m/%d/%Y %H:%M:%S")
  
	echo $filename - $NEWDATE
  
	# Adjust modification time:
	SetFile -m "$NEWDATE" "$filename"
  
	# Adjust creation date
	SetFile -d "$NEWDATE" "$filename"
done