What month and year was the first Twilight movie released?

According to IMDb, it was released in theaters on November 21, 2008 in the USA and released on DVD on March 21, 2009.

The sequel, New Moon, was released almost a year later on November 20, 2009 in the USA.

Eclipse was released on June 30, 2010 in the USA.

The first part of Breaking Dawn is set for release this year, 2011, and the second part is set for next year, 2012.

They pump 'em out fast!