Mahashivaratri

Maha Shivaratri is a festival celebrated every year on the 13th night/14th day in the Krishna Paksha(waning moon) of the month of Maagha or Phalguna in the Hindu Calendar (that is, the night before and day of Amavasya/New Moon). The festival is principally celebrated by offerings of Bilva leaves to the Lord Shiva, all day fasting and an all night long vigil. Cannabis is traditionally used as an offering for Lord Shiva and his followers. Per scriptural and discipleship traditions, the penances are performed in order to gain boons in the practice of Yoga and meditation, in order to reach the goal more swiftly and avoid rebirth.

Brahmatatva about Mahashivaratri: Shivratri is the time when Shiva takes a rest. Shiva rests for one 'prahar' (three hours) of the night. This 'prahar' is referred to as the Shivratri. When Lord Shiva takes rest, the function of 'Shivtatva' (Shiva Principle) ceases, i.e. Lord Shiva goes into a meditative state. Shiva's meditative state is the time when He is engrossed in His own spiritual practice. During that time, the 'Shivtatva' does not accept any tamogun (most base of the 3 elements in us - sattva, raja & tama) or any halahal (venom churned from the ocean) coming from the Universe. As a result, the ratio of halahal or the pressure of the negative energies increases. For protection from this pressure, things like 'bilva patra', white flowers, 'rudraksha' beads etc are offered to Lord Shiva. These things attract the 'Shivtatva' from the atmosphere, thus providing protection from the increasing effect of the negative energies. The Earth is a gross object. Gross objects have very low velocities i.e. they require more time to cover a specific distance in space. Gods on the other hand, are subtle hence they are capable of traversing space within a few seconds. That is why one year on the earth is equivalent to just one day of heaven.