For a Non-Leap Year
It's tomorrow.
Now, on to something more interesting.
We live in a 4-dimensional world, right? Length, height, width/depth, and time. Forget time for now, since that's presumably a part of an any-dimensional world. So that puts us in a 3D world, which is what most people think of this place anyway.
Imagine a 2D world that only has length and height - no depth. It's like living on a sheet of paper that has no perspective. It's what is described in the book Planiverse (which I still haven't found a copy of).
For argument's and simplicity's sake, let's say that 2D world exists around the equator of our 3D Earth, and it moves with the planet as it rotates. So the part that's near the Amazon is always by the Amazon. The part that's by the Sahara is always by the Sahara. And so on.
That 2D world would be affected by a number of things in the 3D world. For example, day and night. When it got dark in the Amazon, it would get dark in that part of the 2D world too.
But the flat people living in the 2D world can't see the sun (or moon and stars). All they can see is what's on their flat piece of paper. They wouldn't be able to understand why it gets light and dark every day. They would just know that it happens.
This may be a flawed setup but stay with me just a little longer.
Here's the deal.
What if we actually live in a 4D world? (That's 5D if you include time.)
Might that be why we can't figure out what gravity really is? And maybe some other things that astrophysicists and other scientists have no clue about?
Is there something happening in that dimension we can't see and can't even prove that it exists that is causing some of the effects we experience in our supposedly 3D world?
Someday we'll know when we no longer have to look through a glass darkly, eh?