From Wikipedia:
Haiku is a type of short form poetry originally from Japan. Traditional Japanese haiku consist of three phrases that contain a kireji, or "cutting word", 17 on (phonetic units similar to syllables) in a 5, 7, 5 pattern, and a kigo, or seasonal reference. Similar poems that do not adhere to these rules are generally classified as senryลซ.
I do not know why Miami weeks are haiku weeks around here, but it has been going on for years.