What is the meaning of poemThe Happiest Day by Edgar Allan Poe?

There is no poem titled "The Happiest Day" by Edgar Allan Poe. It's possible you're thinking of a different poem, or perhaps there's a misunderstanding.

To help me find the right poem, could you please provide more information? For example:

* Do you remember any lines from the poem?

* What is the general theme or topic of the poem?

* Do you remember where you saw or heard the title?

With more information, I can help you find the correct poem and understand its meaning.