Time is traditionally accounted for by counting periodic motion of a planetary mass in the solar system. One rotation of Earth is a day, one revolution about the sun is a year. In the current era, it has its progress tracked by atomic clocks, the principles of which is founded upon the periodic motion of subatomic particles. I recall learning at one point in school that the relevant international standard is based on energy transitions of a particular isotope of caesium, and identifying over nine billion periods of its radiation as one second.
As a dimension, time is indispensable in understanding all manner of sciences and human affairs. The most important to anybody familiar with their own mortality must be as the quantitative measure of the difference between moments of birth and death—and therefore the quantitative metric of life. So (to continue stealing this idea from Jonar C. Nader’s fantastic book How to Lose Friends and Infuriate People), somebody who wastes your time consequently wastes your life.
Most of the time, humans are preoccupied with events in the past. In deciding a course of action, one regards old data as a reliable source of information about the future. Tempting it is to go even further and state that old data programs humans to think vertically. Naturally, the adage states that history repeats itself. However, old data only provides for rational decisions. If old data is a product of the past, what is new data a product of? In answering this question in a way that allows the existence of new data, the foundations of time as seen to be about repeated events needs to be revised.
To put it another way, it’s not just another day.
It’s a new day.