From early sundials and other rudimentary clocks, timekeeping has evolved into an exquisitely orchestrated global symphony that plays 24 hours a day, 365 days a year, literally never missing a beat.
This symphony of time may be one of humanity’s most complex and important — and, perhaps, even beautiful — achievements. Time is probably the most measured quantity on Earth. It even tells us when to wake and when to sleep.
It helps organize and coordinate our lives. Scientists use time to measure and understand countless features of our world. Yet we cannot measure time directly. Our senses can’t measure it. We cannot see it, hear it, taste it, touch it or smell it.
Instead, we measure time intervals — the durations separating two events. “Time” is the accumulation of these intervals. But behind this veneer of simplicity is an intricate global timekeeping effort involving hundreds of sophisticated atomic clocks operated by scientists located around the world.
Each of us depends on a global network of atomic clocks that are continuously being measured, compared and synced to each other, and that are tuned to even purer and more precise timing tones produced by some of the best clocks ever made.
In today’s globalized world, nobody keeps time alone. In 1960, the nations of the world began jointly producing a time scale called Coordinated Universal Time, or UTC. (A time scale is an agreed-upon system for keeping time using data from clocks around the world.)
Since the 1980s, an organization called the International Bureau of Weights and Measures, often referred to by its French-language acronym, BIPM, has overseen UTC.
Despite all of this technology, time is still relative. Meaning that if your plane is due to take off at 8:00 am and your $10,000 Rolex says 7:50, your plane has probably taken off without you.
Yet, 2 Peter 3:8, tells us: “With the Lord a day is like a thousand years.” He is arguing against doubters who complained that Jesus hadn’t returned yet. “The Lord is not slow in keeping His promise, as some understand slowness” God works in His own time for His purpose.
Credit: J. Sherman/NIST, R. Jacobson/NIST
