Shift time stamps of all the files in a folder

correct_timestamp.py

import os.path, time
from datetime import timedelta
import glob

delta = 7*60+41
folder = '/path/to/folder'

for file in glob.glob(os.path.join(folder,'*.JPG')):
    print(file)
    print "last modified: %s" % time.ctime(os.path.getmtime(file))
    new_time = os.path.getmtime(file)+delta
    os.utime(file, (time.time(),new_time))
    print "last modified: %s" % time.ctime(os.path.getmtime(file))