In honor of National Punctuation Day, which is Sept. 24, Jeff Rubin is sponsoring a punctuation haiku contest. Send haiku to Jeff@NationalPunctuationDay.com by Sept. 30 to be considered for prizes.

Here are some sample haikus:

Serial comma.
What is your philosophy?
To use or not to?

Exclamation points
And question marks together?
Only in comics.

The apostrophe:
Found on both sides of letters.
The right side and wrong.

Here are some other ideas on how to celebrate National Punctuation Day.