Note how many minutes slow or fast your clock is running. If it's within one or two minutes of the correct time, you can stop here; most pendulum clocks aren't designed Before you can properly adjust the time on the clock, you must make sure that the pendulum is swinging at the correct rate. You also need to make sure you adjust your Whenever you adjust the pendulum reset the time. Check the clock again in 24 hours. Continue until the clock is keeping the correct time. To adjust the hands:To regulate your clock for proper time keeping, adjustments are made to the pendulum. Reset the clock to the correct time and be sure the clock Adjust accordingly and get your clock to show right time again. The beauty about the pendulum clock is that it is entirely driven by gravity and is driven by Old pendulum clocks usually have a to adjust the length of the pendulum and therefore the time of each swing. This wikiHow tells you how to do this to correct