That is not true! The Earth will  darkness on day 23th to 25th December  2012

 Many hours ago NASA denied the information   Earth  blackouts on 23-25 Dec 2012. I checked the message that two person had been talking about blackout on Earth 23-25 Dec 2012 during alignment of Universe and that is not true. That is just an  individual idea from them not from NASA. But every year on Dec. 21 (the winter solstice in the northern hemisphere) is the darkess day of the year.