March 25 is known as Aizen Day. A day for celebration.
On March 25, 2010 the users of OT turned the board into a complete disaster area with countless topics titled something with "Aizen" in the name.
Ways to Celebrate
Make a topic about Aizen.
Spam a picture of him in virtually every post.
Center comments or responses around the phrase "When did you fall under the impression/When were you under the assumption?"
Drink Tea. Copius amounts of it.
Sit on a couch like a douchebag.