How do you alter the clock on vauxhall astra 2007?

To alter the clock on a 2007 Vauxhall Astra, turn the ignition to the "On" position without starting the engine. Press the "Menu" button on the dashboard until you reach the "Settings" option, then use the arrow buttons to select "Clock." Adjust the hours and minutes using the same buttons, and confirm your changes to set the new time.