Pitru Paksha: The 16-lunar-day period (Sep-Oct) is universally the best time for ancestral rites. Prayagraj sees large gatherings for Tarpan during this time.
Magh Mela: An annual festival (usually Jan-Feb) held in Prayagraj, considered highly auspicious for baths and rituals at the Sangam, including Tarpan.
Kumbh Mela/Maha Kumbh Mela: Occurring periodically (Maha Kumbh every 12 years, next in 2025), this is the most potent time. Rituals performed during Kumbh Mela are believed to yield immense, unparalleled benefits.
Amavasya (New Moon): Monthly new moon days are favorable for ancestral rites.
Daily: Due to the sanctity of Prayagraj, daily Tarpan after a morning bath at the Sangam is practiced by many devout Hindus.