High noon is the point at which the sun is at its highest point in the sky. It is the same time year round. Dawn and dusk change due to the tilt of the earth causing a shorter path from horizon to horizon. You can change your clock all you want, but the sun does not care. You can call it 1pm in the summer, but the sun will continue to be at its position of high noon. Accept that seasons change, and adjust with them.