Hare Krishna Mahāmantra
Ha-re Krish-na Ha-re Krish-na Krish-na Krish-na Ha-re Ha-re
Ha-re Ra-ma Ha-re Ra-ma Ra-ma Ra-ma Ha-re Ha-re
हरे कृष्ण हरे कृष्ण कृष्ण कृष्ण हरे हरे।
हरे राम हरे राम राम राम हरे हरे॥
A continuous calling on the divine names of Hari (Vishnu/Krishna), Krishna, and Rama. "Hare" is a vocative of Hara — calling upon the divine energy that removes all suffering.
Hare = O Hari/O divine energy (Hara); Kṛṣṇa = the all-attractive one; Rāma = the reservoir of all pleasure (or: Rama the prince of Ayodhya).
Anytime; especially during kirtan, morning meditation, and Ekadashi.
Best Time: Anytime; Ekadashi
Kali-Santarana Upanishad; widely popularised by ISKCON / Chaitanya Vaishnava tradition
Pronunciation aid only — not a certified Vedic recitation.