The tipping stage for Twitter's recognition was the 2007 South by Southwest Interactive (SXSWi) meeting. It experienced 400,000 tweets posted for each quarter in 2007. This grew to 100 million tweets posted per quarter in 2008. In February 2010, Twitter users were sending fifty million tweets for every day. Work on the project started on March 21, 2006, when Dorsey released the very first Twitter message at 12:50 p.m.