Kalashtami, Kalabhaira Ashtami, is the Masik Kalashtami (Monthly Kalashtami) vrata observed on the eighth day of dark fortnight of every month as per Hindu calendar.
Kalashtami Vrat is dedicated to Kalabhairav (Mahakaal Bhairav), one of the aspects of Lord Shiva. It is mainly observed in Maharashtra and some other parts of North India.
Mahakaal Bhairav Jayanti (Kalabhairav Ashtami) is observed on Krishna Paksha Ashtami in Margashirsha Month as per North Indian Hindi calendars. It coincides with Kartik Month as per Gujarati, Marathi, Telugu and Kannada calendars.
Here is the list of Masik Kalashtami 2013 dates…
Saturday, 5 January 2013: Kalashtami in Paush Month / Margashirsha Month
Sunday, 3 February 2013: Kalashtami in Magha Month / Paush Month
Monday, 4 March 2013: Kalashtami in Phalgun Month / Magha Month
Wednesday, 3 April 2013: Kalashtami in Chaitra Month / Falguna Month
Thursday, 2 May 2013: Kalashtami in Vaishakha Month / Chaitra Month
Friday, 31 May 2013: Kalashtami in Jyeshta Month / Vaishakha Month
Sunday, 30 June 2013: Kalashtami in Ashada Month / Jyeshta Month
Monday, 29 July 2013: Kalashtami in Shravan Month / Ashada Month
Wednesday, 28 August 201: Kalashtami in Bhadrapada Month / Shravan Month
Friday, 27 September 2013: Kalashtami in Ashwin Month / Bhadrapada Month
Saturday, 26 October 2013: Kalashtami in Kartik Month / Ashwin Month
Monday, 25 November 2013: Kalabhairav Ashtami – Mahakaal Bhairav Jayanti: Kalashtami in Margashirsha Month / Kartika Month
Wednesday, 25 December 2013: Kalashtami in Paush Month / Margashira Month