Today, 24 December 2011 is Amavasya in Hindu calendar. This Amavasya is Poush Amavasya in North Indian Hindi calendars & Margashirsha Amavasya (Margashira amavas) in Telugu, Kannada, Marathi and Gujarati Panchangs. Amavasya begins at 2.01 AM on 24 December and ends at 11.36 PM. As it falls on Shanivar (Saturday), it is also observed as Shani Amavasya Vrat.
This Amavasya falls in Marghazi Masam (Margali Month) in Tamil Nadu calendars and in Dhanu Month in Kerala Malayalam calendar. It is the last No Moon day in Gregorian calendar (English calendar).