There’s a convention in theoretical physics to adopt so-called “natural” units. In the natural system of units, measures of length, time, and mass are chosen so as to make the speed of light and the gravitational constant 1. Or sometimes it’s the speed of light and Planck’s constant.
Anyhow, this makes the resulting measures of length, time, and mass completely nonsensical to any human scale problem. But it makes physics equations much shorter to write down, because you can drop all of the c’s, G’s, and h-bars and whatnot.
For example, the famous E = m c^2 becomes E = m. Energy is mass. Voila.



This is for the pre-millennial dispensationalists. For the pre-millennials, the rapture will occur at the start of the 1000 year tribulation (as depicted in Left Behind). So it’s exciting if there’s a sign it might happen soon.
(Let’s just ignore the gospel passage about “ye shall know not the hour…” Etc etc.)
For the post-millenials, the rapture will occur after the 1000 years of tribulation, not before. So it’s less exciting, because you’ll probably die before then, so you won’t be eligible for rapture.
And of course the amillennials don’t necessarily think the 1000 years is a literal 1000 years, and they have various opinions about how figurative John of Patmos was, or just how many balls he was tripping.