Step 1: Press the "SEL/RESET" button on the dashboard to enter the clock setting mode.
Step 2: Use the up and down arrow buttons next to the "SEL/RESET" button to adjust the time. The top arrow button represents the hours, and the bottom arrow button represents the minutes.
Step 3: After setting the desired time, press the "SEL/RESET" button again to confirm and save the settings.
Note:
* The clock in the 2001 Honda Civic EX uses a 12-hour format, so be sure to set the correct AM/PM setting if your region observes it.
* The clock on the Civic EX is synchronized with the audio system. So if you change the clock setting on your audio system, it will automatically update the time on the clock as well.
* If the car's battery has been disconnected or died, the clock settings might get reset. In that case, you'll need to follow these steps to set the clock again.