Reposted from NPR (The original document is at http://www.npr.org/templates/story/story.php?storyId=130103176&sc=fb&cc=fp):
Its National Punctuation Day! If that sentence made you cringe, then welcome to the fold. Its, it's. Your, you're. Why can't people get it right?
On Friday, Sept. 24, punctuation aficionados across the country celebrated the seventh annual National Punctuation Day. Last year's celebration featured a baking contest (here's the recipe for "Punctuation Meatloaf"), and this year, organizers kicked off a punctuation-inspired haiku challenge:
Em dash or en dash.