February 15th, (for America, February 16 for India) is Ekadasi. February 16 (in America, which is February 17 in India) is Varaha Dvadasi, the appearance day of Lord Varaha, Sri Krsna's Boar incarnation. February 17 (in America, which is February 18 in India) is Nityananda Trayodasi, the appearance day of Lord Nityananda.
Srila Narayana Gosvami Maharaja recommends that these three holy days be observed in the following manner: The first day is observed as a regular Ekadasi. Regarding the second day, although generally the appearance day of any of the Lord's incarnations is observed as Ekadasi, Lord Varaha's appearance day will be observed as Dvadasi. That is, one should break the fast with grains (paran) as usually done on the day after Ekadasi. [If you do not know the time of breaking fast for your area of the world, you may log on to: http://www.purebhakti.com/calendar/calendar.php.] Grains may also be taken later in the day. Glorification of Lord Varaha shall be celebrated in the morning, before taking paran. Then, on the next day, Nityananda Trayodasi, Ekadasi fasting is again observed, and Lord Nityananda can be glorified any time of the day or night.