Source : www.dinamalar.com
In 2009 , there are two Vaikunta Ekadashi , One was on 07.01.09 and the second one is on 28.12.09 .
Vaikunta Ekadashi is an auspicious day , dedicated to Lord Vishnu and falls in the Margazhi month as per tamil calender. As per Telugu Calender, it is observed in the pushya month. Vaikunta Ekadashi is also known as Mukkoti Ekadashi and as Swargavathil Ekadashi in Kerala.
To know more details about Vaikunta Ekadashi , check the link given below :
