Your local time now:
CCTV calculator
What do you already know about the incident?
Offset calculator
Photograph the clock at the top of this page next to the CCTV time so one photo shows both clocks at the same time, then enter both times below.
Real time — from this page / your photo
CCTV clock showed at that same moment
Enter both times to see the clock offset.
Time of the incident
Time
Finish
Enter the offset above, then the incident time.