Maha Shivaratri Festival is being celebrated on the 13th night/14th day in the Krishna Paksha of the month of Maagha (as per Shalivahana) or Phalguna (as per Vikrama) in the Hindu Calender every year. Maha Sivarathri Festival is dedicated to Lord Shiva, the Destroyer. Shivaratri means the Great Night of Lord Shiva.
According to Hindu religious scripture, this day is considered as Lord Shiva's Favourite Day and hence this festival is celebrated with a great religious fervour and devotion.
In this year 2015, Maha Shivaratri Festival will be celebrated on February 17, 2015 (Tuesday).
On this auspicious day, devotees offer special poojas/prayers to the Lord Shiva, observe all-day fasting, all-night vigil(Jagaram/Jagaran), perform Bhajans as chanting of " Om Namah Shivaya", recitation of "Shiva Ashtottara Namavali" & "Lingastakam" and more.
Significance of Maha Shivaratri:
Shivaratri Legend says that on the auspicious night of Maha Shivaratri, Lord Shiva performed the "Tandava", the dance of the primal Creation, Preservation and Destruction.
Another Shivaratri Legend stated in Linga Puranam mentioned that, on this Maha Shivaratri day, Lord Shiva manifested himself in the form of Linga.
Another Shivaratri legend says that Lord Shiva married Goddess Sri Paravathi Devi on this day.
Hence this festival is celebrated with a great religious fervour by the Hindus in India.