National Novel Writing Month (also known as NaNoWriMo) is an annual internet-based creative writing project which challenges participants to write 50,000 words of a new novel between November 1 and November 30. Its sister event is a script-writing challenge taking place in April called Script Frenzy.
The project started in July 1999 with just 21 participants, but by the 2010 event over 200,000 people took part - writing a total of over 2.8 billion words.
Writers wishing to participate first register on the project's website, where they can post profiles and information about their novels, including synopsis and excerpts. Word counts are validated on the site, with writers submitting a copy of their novel for automatic counting. Municipal leaders and regional forums help connect local writers with one another for holding writing events and to provide encouragement.