California-based electronic music promotion company Insomniac has announced the dates for its Labor Day festival in southern California later this year. Nocturnal Wonderland will be celebrating 20 years later in 2015, and for the occasion the festival has expanded from its traditional two days to a full three days.

Nocturnal Wonderland will take place this Labor Day weekend in the beginning of September from Sept. 4 to 6. The festival will return to the spacious and picturesque San Manuel Amphitheater & Grounds in San Bernardino, California, outside Los Angeles, the home of Insomniac.

With the advent of the additional day, fans will be able to stay overnight on the festival grounds and sleep over in the Nocturnal camping community. The grounds will open before the festival begins.

Celebrating 20 years, Nocturnal Wonderland has hosted more than 600,000 festivalgoers on its grounds since its inaugural edition in 1995.

Artists like Axwell, Avicii, Above & Beyond, The Chemical Brothers, Steve Angello, Armin van Buuren and others have all performed at Nocturnal Wonderland.

Though its roots are in California, Nocturnal Wonderland has expanded beyond the West Coast. In 2010, the festival inaugurated its first Texas edition, but could not keep it going beyond 2012.

There are no further details about the festival at this time, but more details will be revealed soon about extended camping options in the coming months. 2015 is a big year for the California Insomniac festivals, with Nocturnal turning 20 and Beyond Wonderland making its triumphant return to the Bay Area.

The festival is an 18-and-over event, with VIP passes available. Tickets go on sale March 16 at 10 a.m. PST. Payment plans will be offered for those who cannot afford the tickets all at once. Head to the festival's website for more information and watch the trailer below to set the mood.

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