The tipping point for Twitter's popularity was the 2007 South by Southwest Interactive (SXSWi) conference. It experienced 400,000 tweets posted per quarter in 2007. This grew to 100 million tweets posted per quarter in 2008. In February 2010, Twitter end users had been sending 50 million tweets for every working day. Work on the project commenced on March 21, 2006, when Dorsey published the very first Twitter information at 12:50 p.m.