What causes Zalgo text to do this?

Question

Before jumping the gun on anything, yes, I have looked at this Q/A already.

I've recently discovered the Twitter user '@Glitchr_', and have been looking through some of his tweets and some of the "art" he makes. Something that caught my eye as I was scrolling down the page were these two things:

Now, you may think, wow, backwards text. The title must be formatted like that. But if you look into the HTML, here's what you find (Highlighted Text):

The second thing I found was this:

Some of the zalgo text also messed up the dates and somehow reversed it as shown.

So as stated in the title, What causes Zalgo text to do this?

Answer 1

The text contains U+202E (RIGHT-TO-LEFT OVERRIDE), which indicates that the text should be rendered from right-to-left.

For example:

U+0041 U+0042 U+0043
ABC

U+202E U+0041 U+0042 U+0043
‮ABC

In this case, the character is in @glitchr_'s name: "Glitcher<U+0020><U+202E>".