There is a general consensus about what time really is. It is generally considered to be objective and universal. One cute definition is that time is nature's way of keeping everything from happening at once. More scientifically time is a measurement of the rate of the redistribution of energy (otherwise known as the Second Law of Thermodynamics). The precise measurement of time is given by the assigned value of 1,192,631,700 cycles of the radioactive decay of the isotope Cesium 133. Unknowingly, this is what we mean when we assume one second of objective time. This is relentlessly affirmed as we go about our daily business.
Common experience, however, is an intimate intermingling of objective and subjective awareness, each being categorically different from the other.