Holikā Dahana 2123: Kolkata Calcutta, West Bengal

Holikā Dahana (Choṭī Holī, Small Holi) is performed on the full-moon night of Phālguna. At dusk or after Bhadrā kāla has passed, communities gather around a large bonfire to burn an effigy of Holikā, the demoness who was destroyed trying to kill the devotee Prahlāda. The bonfire represents the triumph of devotion over evil, and the burning away of our own inner demons.

The story: the demon king Hiraṇyakaśipu wanted his son Prahlāda to worship him instead of Viṣṇu, but Prahlāda refused. After many failed attempts to kill Prahlāda, Hiraṇyakaśipu enlisted his sister Holikā, who had a divine boon of immunity from fire. She sat in a pyre holding Prahlāda in her lap. But Viṣṇu's grace protected Prahlāda: Holikā's boon (which required her to never misuse it) failed, and she burned while Prahlāda walked out unharmed.

The Bhadrā timing is critical: lighting the fire during Bhadrā kāla (a period associated with the shadow-serpent Viṣṭi Karaṇa) is considered inauspicious and potentially harmful. The pūjā must be performed either before Bhadrā begins or after it ends: the exact Pradoṣa-to-Niśīta window without Bhadrā is the correct muhūrta. This is why the precise time from pañcāṅga varies significantly by location.

Families circle the bonfire, offering coconuts, jaggery, and grains. New barley (representing the spring crop) is roasted in the flames. The next morning is Holī: the festival of colours.