It is an example of the intricacies of the workings of the Universe - the work of God's fingers , according to the psalmist. Just as an aside, some people have tried to explain away the darkness at the time of Jesus's death, as a total eclipse. There are two reasons why such a simplistic explanation will not work. First, the details of total eclipses can be worked out. I have known about the exact time of the 1999 eclipse, since someone gave me a copy of the RAS Year book 1973, which contained details of all eclipses up to about the year 3000.
Eclipses are regular as clockwork.
Second, Jesus ws crucified at Passover time. Passover always happens near Full Moon. But eclipses, by definition, only happen at New Moon.