What Is Amavasya? New Moon Day in Hindu Calendar

Amavasya is the new moon day — the 30th and final Tithi of the Hindu lunar month — when the Sun and Moon occupy the same zodiac degree and the Moon becomes invisible from Earth. The word comes from Sanskrit: Ama means "together" and Vasya means "dwelling," describing the Sun and Moon residing together in the same celestial space. In Vedic astrology and Hindu tradition, Amavasya is considered the most potent day for ancestor worship (Pitru Tarpan), spiritual practices, and connecting with the subtle worlds — while simultaneously being cautioned against for new beginnings and auspicious ceremonies.

Written by Shri Ankit Bansal, Vedic Astrologer with 15+ years of practice in Jyotish and Panchang analysis.

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On Amavasya, the Sun and Moon are conjunct — occupying the same zodiac degree in the sky. From Earth, the Moon is entirely invisible, receiving no reflected sunlight. In Vedic cosmology, this confluence of the two luminaries creates a unique energetic condition:

• Tamas (inertia) increases — the absence of moonlight reduces the activating, emotional energy of the Moon
• The veil between worlds thins — traditional belief holds that ancestor spirits (Pitrus) are more accessible on Amavasya than any other day
• Inner world becomes prominent — without the external pull of the full Moon, consciousness naturally turns inward

Amavasya occurs once per lunar month, approximately every 29.5 days, matching the Moon's synodic cycle. The Hindu lunar calendar gives each Amavasya a distinct name based on the solar month in which it falls.

Month | Amavasya Name | Special Significance

1. Chaitra (March–April) | Chaitra Amavasya | New Year period; ancestor offerings begin new annual cycle
2. Vaishakha (April–May) | Vaishakha Amavasya | Auspicious for Ganga bath and charity
3. Jyeshtha (May–June) | Vat Savitri Amavasya | Women fast for husband's longevity (Vat Savitri Vrat)
4. Ashadha (June–July) | Ashadha Amavasya | Offerings for paternal ancestors
5. Shravana (July–August) | Shravana Amavasya | Hariyali Amavasya; offering water to plants and nature
6. Bhadrapada (Aug–Sept) | Bhadrapada Amavasya | Pitru Paksha begins after this Amavasya
7. Ashwin (Sept–Oct) | Mahalaya Amavasya | The most sacred of all Amavasyas for ancestor worship
8. Kartika (Oct–Nov) | Kartika Amavasya | Diwali falls on this Amavasya — most celebrated
9. Margashirsha (Nov–Dec) | Margashirsha Amavasya | Sacred to Vishnu; charitable donations amplified
10. Pausha (Dec–Jan) | Pausha Amavasya | Winter solstice period; fire rituals emphasized
11. Magha (Jan–Feb) | Magha Amavasya | Bathing at Prayagraj (Triveni Sangam) is especially sacred
12. Phalguna (Feb–March) | Phalguna Amavasya | Shivratri often falls near this Amavasya

Most Sacred Amavasyas

Mahalaya Amavasya (Ashwin month): The culminating day of Pitru Paksha — the 16-day period specifically dedicated to ancestor worship. This is the single most important day in the year for performing Shraddha ceremonies and Tarpan (water offerings to ancestors). Families who can only perform one annual ancestor ceremony typically do it on Mahalaya Amavasya.

Kartika Amavasya (Diwali): The new moon of Kartika month is unique — instead of being avoided for celebrations, it is the principal festival day of Diwali. Lakshmi worship, lamp lighting, and prosperity rituals on this Amavasya are amplified by the darkness of the moonless sky, symbolising the goddess of light entering the darkest night.

Somvati Amavasya: When Amavasya falls on a Monday (Somvara), it is called Somvati Amavasya — considered especially auspicious for Peepal tree worship, married women's prayers for husband's longevity, and ancestor rites.

The most distinctive practice on Amavasya is Pitru Tarpan — the offering of water mixed with black sesame seeds (til) and barley to deceased ancestors. In Vedic cosmology, deceased ancestors (Pitrus) inhabit a subtle realm called Pitru Loka and are said to be most accessible to their descendants on Amavasya. Performing Tarpan is believed to:

• Satisfy the Pitrus' need for continued connection with the living
• Remove Pitru Dosha (ancestral debt) from the family chart
• Bring blessings of health, prosperity, and family harmony to the performers
• Help the departed ancestor's soul progress toward liberation (Moksha)

Basic Tarpan practice: 1. Bathe early in the morning, ideally in a river or at home 2. Face south (direction of Yama and the ancestors) 3. Offer water mixed with black sesame seeds through your right palm (Pitru Tirtha) 4. Recite the names of deceased ancestors (maternal and paternal lineages for three generations) 5. Offer simple food (sesame balls, kheer, or simple grain) to crows (considered the vehicle of ancestors) 6. Make charitable donations in the ancestors' names

Spiritually auspicious:

• Pitru Tarpan and Shraddha ceremonies for deceased ancestors
• Meditation, mantra japa, and silent prayer — the inward energy of the dark Moon amplifies inner practice
• Visits to sacred rivers (Ganga, Yamuna, Godavari, Kaveri) — bathing on Amavasya carries special merit
• Donations and charity — the merit of giving is considered amplified on Amavasya
• Fasting (partial or complete) — particularly for Saturn-related fasts and general spiritual purification
• Shiva worship — the dark Moon is particularly associated with Shiva's domain

Amavasya is generally avoided for:

• New beginnings: Starting businesses, new jobs, launching projects
• Auspicious ceremonies: Weddings, griha pravesh (house entry), sacred thread ceremonies
• Major purchases: Buying property, vehicles, jewellery
• Travel for auspicious purposes: Though necessary travel is fine
• Hair cutting and shaving: Traditional Panchang caution (also on Tuesdays and Saturdays)

Note: Cultural practice varies by region and community. Some traditions have specific exceptions, such as the Diwali Amavasya which is highly celebratory.

In birth chart analysis, the Moon on Amavasya (or within a few degrees of the Sun) creates a Amavasya Moon or Vata Moon — sometimes also called "Dark Moon" in modern interpretations. This placement has distinct characteristics:

• The Moon in very close conjunction with the Sun receives heavy combustion (Moudyami in Sanskrit)
• A combusted Moon can affect emotional sensitivity, mother relationship, and mind in the natal chart
• However, a strong Sun in good dignity can support such a Moon
• Remedies for Amavasya Moon typically involve Moon-strengthening practices: wearing pearl (after consulting a Jyotishi), Monday fasts, and the Om Chandraya Namah mantra

Pitru Dosha is an astrological indication of ancestral karmic debt — typically seen when the Sun, Moon, or Rahu/Ketu are placed in specific configurations in the 9th house (father), 4th house (mother), or when Saturn affects the Moon. Amavasya is the primary day for propitiating this dosha through:

• Regular monthly Tarpan on each Amavasya
• Mahalaya Amavasya Shraddha ceremony
• Donations of food and clothing in ancestors' names
• Sponsoring Brahmin meals on Amavasyas throughout the year