Darth vader approves

What does April have to do with Rick Astley and his song. That is my point.

That doesn't make sense

Well, rickrolling is a prank; an Internet meme usually involving an unexpected appearance of the music video for a 1987 Rick Astley video.

And the first day of April is April Fool's Day.

And if I have to go further than that to explain it, then just forget I said anything, because it's not worth the effort!