WikiAnswers is updated every second of every day 365 days a year! Questions are asked and answered, answers are improved, questions are put in categories and merged and split and more!
Technical updates, like for bugs, features and other technical things are done 2 to 3 times each month.
So, the answer to your question is "this month" no matter what month or year it happens to be.
WikiAnswers is usually updated 2-3 times a month. New bugs will occasionally pop up, new features are wanted, and new layouts are always suggested, so WikiAnswers is updated (usually on a Sunday) at least 2-3 times a month.
2012
A Wiki is updated at will by any member.
WikiAnswers is updated constantly, every time someone asks or answers a question, merges two questions together, or makes other edits to the site.
april 2012.
WikiAnswers is continually being updated and changed by its users. Oftentimes over 10,000 answers are posted in a day. To see when a question was last updated, sign in and then click on the question history link in the member toolbar.
That honor belongs to Rudiful2 with 3,136,085 contributions. Last updated 9-4-2012
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WikiAnswers is updated continuously, every time a contribution is made in fact. Take a momment and view the recent site activity, and you'll clearly see the volume of updates.
WikiAnswers is being updated constantly, every second in fact. Go to the homepage to see recent questions asked and answered. If you are wondering when a question was last edited, click "Question History" in the blue bar on the left hand side.
Answers dot com and WikiAnswers get updates every day. Posted answers are always changing. Always look at the bottom of webpages for update date. On WikiAnswers check the Question History.
CPT codes are updated every January.