Yes, that is from memory (please excuse any erroneous punctuation). And no, I haven't seen the movie (furthermore, I am horrified that there is a movie, but that's probably for another post).
On the fifteenth of May
In the jungle of Nool,
In the heat of the day,
In the cool of the pool,
He was splashing --
Enjoying the jungle's great joys --
When Horton the elephant
Heard a small noise . . .
HHAW day is kind of like St. George's day, but mostly different.
It should be celebrated by reading Horton Hears a Who, preferably in the company of small children.