Sunday 5th Feb is Lord Nityananda’s appearance day here in the UK.
“Lord Nityananda is the eternal associate of Caitanya Mahaprabhu, the Supreme Personality of Godhead. Rarely is the name Nimai (Caitanya Mahaprabhu) taken without that of Nitai (Lord Nityananda). Mahaprabhu cannot be approached or understood without the mercy of Nityananda Prabhu, who is the cardinal guru of all the universes and serves as an intermediary between Mahaprabhu and His devotees. He is the Lord’s active principle in both creation and lila. He is the second body of the Lord, manifesting as Balaram to Sri Krishna, Lakshman to Sri Ram and Nityananda Prabhu to Caitanya Mahaprabhu. All other forms and expansions of the Lord emanate from this second body. Nityananda Prabhu is thus the source of Sankarshan, all the Vishnu’s, and Ananta Sesa. As Vishnu tattva He and Advaita Acarya are worshipped in the same category as Caitanya Mahaprabhu. In the manifested earthly lila, Nityananda Prabhu is senior to Caitanya Mahaprabhu by more than a decade. He is statuesque, like His Master, with the whitish complexion of Lord Balarama. His garments resemble a cluster of blue lotus flowers and His effulgence is said to surpass the grandeur of a rising moon at sunset. He has a deep melodious voice, constant singing the glories of Sri Krishna and carries a red stick with benedictions for the devotees, but feared by the demoniac. He has the carefree mood of a wild avadhuta, so absorbed is He in the love of Godhead, and no one knows what He will do next.” (courtesy of http://www.iskcondc.org/ )
Devotees of Lord Nityananda celebrate by fasting until noon, cooking a feast, and chanting the glories of Nitai.