Tradition holds that at 3PM on Good Friday Christ breathed his last and the Temple Curtain ripped in two. As told by Matthew:
And when Jesus had cried out again in a loud voice, he gave up his spirit. At that moment the curtain of the temple was torn in two from top to bottom. The earth shook and the rocks split.
Today, sitting in the MIT Chapel, at exactly 3:00PM a thunderous roar went up and shook the building. I was taken aback at first. Later I discovered that it had been from the fighter jet flyby for opening day at Fenway.