Mahashivratri or night of Lord Shiva is an auspicious day dedicated to worship of Lord Shiva. The festival is generally celebrated in the Georgian months of Feb or March. According to hindu calendar Mahashivratri falls on the night before ‘amavasya’ in the month of Phalgun in entire north India while the corresponding month in Gujarat, Maharashtra and Andhra Pradesh is Magha. In 2010, the date of Mahashivaratri is February 12.
Masa Shivratri also observed on the thirteenth day of Krishna Paksha (waning phase of the moon) in all traditional Hindu months.