Via the Blog Action Day website:
Blog Action Day is an annual event that unites the world’s bloggers in posting about the same issue on the same day. Our aim is to raise awareness and trigger a global discussion around an important issue that impacts us all.
For 2011, our Blog Action Day coincides with World Food Day, so our topic of discussion for this year will be food. Take the first step now and sign-up your blog to Blog Action Day and then look at our suggested topics for some food flavoured inspiration to discuss.
First and last, the purpose of Blog Action Day is to create a discussion. We ask bloggers to take a single day out of their schedule and focus it on an important issue.
By doing so on the same day, the blogging community effectively changes the conversation on the web and focuses audiences around the globe on that issue. Our hope is that out of this discussion naturally flow ideas, advice, plans, and action.
[Image is the Blog Action Day logo, adapted from http://blogactionday.org/]