rename_images.py

#!/usr/bin/env python

import datetime

base = datetime.datetime(year=2019, month=5, day=11, hour=3, minute=0, second=0)
delta = datetime.timedelta(hours=3)

start = 1
end = 76

for n in range(start, end + 1):
    print "mv img_{}.jpg {}.jpg".format(n, base.strftime("%Y-%m-%d-%H%MZ"))
    base += delta