Its August the 1st in Japan now which means its Oppai Day.
The reason being is that today's date is written as 08/01. "0" = "O", "8" = "pa", "1" = "i" =total being "O(p)pai".

And here is your sauce.
"8" is "pa" because it comes from "ha" as in "hachi".

And to celebrate Oppai Day, this thread of all your favorite oppai!

Incidentally, tomorrow is Pantsu Day. Reason is that 8/2 would be pronounced as "8" = "pa" and "2" as "tsu" ="pantsu". Sauce from Google sensei.

View more at www.dannychoo.com/post/en/26200/Oppai+Day.html