This is simple to solve......... take 12 hours off your time and then add 3 hours. Then multiply three minutes by 20 and also add this result to the previous one. Multiply 60 minutes by 6 and add the result to the previous figure. Then divide 120 minutes by 2 and add 3. When that total (minutes) is applied to the latest figure you will find that, voila!, your clock now reads the same as the forum one.