This year, January 27th marks the appearance anniversary of Varaha avatar (Lord Krishna's boar incarnation). As described in the Srimad Bhagavatam, Lord Krishna assumed this form of a gigantic boar to lift the drowning planet Earth from the cosmic ocean with his tusks.
More information about the appearance of Varaha avatar can be found here; below is a summary of the pastime written by Urmila devi dasi:
“In Vedic cosmology, planets are conscious persons. The planet Earth once fell into the universal water when demonic persons disturbed her orbit by drilling for oil and upsetting her balance. Celestial beings, called devas, who control the universe in service to Krishna, wanted Earth to be rescued.
Responding to their desire, the Lord came to save her. He assumed the form of a splendid, gigantic boar (Varaha), dove to the bottom of the universal ocean, picked up Earth, and gently carried her on His tusks to the water’s surface. As He did so, a great demon challenged Him.
Lord Varaha then carefully placed fearful Earth on the water and gave her the ability to float. A fight between the Lord and the demon ensued within the great ocean. After defeating the demon, Lord Varaha returned to the spiritual sky.”