Most people believe that this Diwali, Lakshmi Puja needs to be conducted during Pradosh Kaal. This period starts after sunset and lasts for approximately 2 hours and 24 minutes. Some other sources also mention that Lakshmi Puja should be performed during Mahanishita Kaal. The Mahanishita Kaal is known to be best suited for the Tantrik community and the practicing Pundits who are said to be the most knowledgeable about Lakshmi Puja. For people who get too confused, the Pradosh Kaal Muhurat is the best. One of the muhurats that is not advised for Lakshmi Puja is the Choghadiya Muhurat. This muhurat is good only for traveling. One should perform Lakshmi Puja during Pradosh Kaal only when Sthir Lagna prevails.
Shivaratri is celebrated on the 6th night of the dark Phalgun (Feb or March) every year. On the auspicious day, devotees observe fast and keep vigil all night. Mahashivaratri marks the night when Lord Shiva performed the ′Tandava′. It is also believed that on this day Lord Shiva was married to Parvati Ma. On this day Shiva devotees observe fast and offer fruits, flowers and bel leaves on Shiva Linga. Shivaratri is also spelled as Shivratri, Shivarathri and Shivaratri is a popular Hindu festival. It is celebrated every year in reverence of the Lord Shiva. Maha Shivaratri festival is also widely known as 'Shivaratri'. It means the 'Great Night of Shiva'. This auspicious day is believed to be the day of convergence of divine powers of Lord Shiva and Goddess Shakti. It is believed that on this day the planetary position in universe evokes the spiritual energies very easily. Religious penances are carried out to gain boons through the practice of medication and yoga. People worships lord Shiva whole day and chants "Om Namah Shiva". Some devotees also perform Maha Mrityunjaya Mantra to seek divine blessings of Lord Shiva.