Then define two types of seconds. * The reference second, used for the metric system definitions and science in general. * The real-life second, based on the

Then define two types of seconds. * The reference second, used for the metric system definitions and science in general. * The real-life second, based on the rotation of the earth. If you want to keep a Cesium reference for every day time, you can define the second as either 9,192,631,770 or 9,192,631,771 oscillations in a given proportion. X short seconds followed by Y long seconds, with the X/Y ratio decreasing daily. When X becomes 0, increment both numbers and start over.