Kalashtami (Kalabhairava Ashtami, Masik Kalashtami, Monthly Kalashtami) vrata is observed on the eighth day of dark fortnight (Krishna Paksha) 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 2018 dates…
Monday, 8 January 2018 – Kalashtami in Magh Month
Wednesday, 7 February 2018 – Kalashtami in Phalgun Month
Friday, 9 March 2018 – Kalashtami in Chaitra Month
Sunday, 7 April 2018 – Kalashtami in Vaishakh Month
Monday, 7 May 2018 – Kalashtami in Pratham Jyeshta Month (Adhik Jyeshta Month)
Wednesday, 6 June 2018 – Kalashtami in Dwitiya Jyeshta Month (Nija Jyeshta Month)
Friday, 6 July 2018 – Kalashtami in Ashada Month
Saturday, 4 August 2018 – Kalashtami in Shravan Month
Sunday, 2 September 2018 – Kalashtami in Bhadrapada Month
Tuesday, 2 October 2018 – Kalashtami in Ashwin Month
Wednesday, 31 October 2018 – Kalashtami in Kartik Month
Thursday, 29 November 2018 – Kalabhairav Jayanti (Kalashtami in Margashirsha Month)
Saturday, 29 December 2018 – Kalashtami in Poush Month
Sunday, 27 January 2019 – Kalashtami in Magh Month
Tuesday, 26 February 2019 – Kalashtami in Falgun Month
Wednesday, 27 March 2019 – Kalashtami in Chaitra Month