Poush month is the ninth month in a traditional Bengali calendar. The previous month was the Agrahan Maas. Poush month in Bengal Calendar begins on December 18, 2015 and ends on January 15, 2016. In Gregorian calendar, the Poush month begins in Mid December and ends in Mid January.
Purnima day in Poush Month in 2015 is on December 25, 2015
The Aamabashya in month is on January 10, 2016.
The two Ekadashis in the month are on December 21, 2015 and January 4, 2016.
Swami Vivekananda's birthday per Gregorian calendar or English calendar is on January 12.
The next month in Bengali calendar is the Magh month.