Every sacred observance in Sanātana Dharma is governed by cosmic rhythm (Kāla) and exact astronomical boundaries. Explore canonical festival determination rules, fasting disciplines (Vrata Niyama), and ritual timings compiled from the Nirṇaya Sindhu and Dharma Sindhu.
23 observances
अक्षयतृतीया (युगादितृतीया)
The Inexhaustible Day of Prosperity and auspicious beginnings; Treta Yuga commenced on this tithi; Ganges descended to earth. Any good deed, Japa, or charity done today yields inexhaustible merit.
Presiding deity Goddess Mahalakshmi & Lord Kubera
Observed on Vaishakha Shukla Tritiya during Purvahna / Aparahna. Nirnaya Sindhu prescribes Tritiya joined with Rohini nakshatra as exceedingly auspicious.
धनत्रयोदशी (धनतेरस / यमदीपदानम्)
Appearance of Lord Dhanvantari (divine physician) carrying the vessel of Amrita during Samudra Manthana; worship of Lord Kubera and Yama Deepa Dana at southern doorway.
Presiding deity Lord Dhanvantari & Lord Kubera
Observed on Ashvina/Kartika Krishna Trayodashi overlapping Pradosha Kala (sunset twilight).
दीपावली (महालक्ष्मीपूजनम्)
The Grand Festival of Lights; invocation of Goddess Mahalakshmi into houses glowing with earthen lamps; celebration of light over darkness and prosperity over destitution.
Presiding deity Goddess Mahalakshmi & Lord Ganesha
Observed on Ashvina/Kartika Amavasya overlapping Pradosha Kala. When Amavasya covers Pradosha on two consecutive evenings, the second evening is selected as authoritative.
गीताजयन्ती (मोक्षदा एकादशी)
Commemoration of Bhagavan Sri Krishna imparting the immortal nectar of Srimad Bhagavad Gita to Arjuna on the battlefield of Kurukshetra; complete recitation of all 18 Adhyayas.
Presiding deity Bhagavan Sri Krishna & Srimad Bhagavad Gita
Observed on Margashirsha Shukla Ekadashi at local sunrise (Smartha & Vaishnava traditions).
गुरुपूर्णिमा (व्यासपूजा)
Sacred adoration of Sage Veda Vyasa who compiled the Vedas and composed the 18 Puranas and Mahabharata; disciples express supreme reverence to their Spiritual Preceptor.
Presiding deity Sage Veda Vyasa & Guru Parampara
Observed on Ashadha Purnima remaining for at least 3 muhurtas (6 ghatis) after sunrise. Sannyasis commence their Chaturmasya Vrata on this auspicious day.
श्री हनुमज्जयन्ती
Celebration of the birth of Sri Hanuman, supreme devotee of Lord Rama, embodiment of boundless courage, humility, wisdom, and celibacy.
Presiding deity Lord Sri Hanuman
Observed on Chaitra Shukla Purnima at local sunrise. Chanting of Sundarakanda and Hanuman Chalisa brings protection from negative influences and Saturn afflictions.
कार्तिकपूर्णिमा (देवदीपावली)
Festival of Divine Illumination; Lord Shiva incinerated the three demonic flying citadels (Tripurasura); holy dips in sacred rivers and floating deepas on waters.
Presiding deity Lord Tripurari Shiva & Lord Vishnu (Matsyavatara)
Observed on Kartika Shukla Purnima during Pradosha Kala.
दुर्गाष्टमी (महाष्टमी / सन्धिपूजा)
Sacred 8th day of Sharada Navaratri celebrating Goddess Mahagauri and Chamunda slaying Chanda and Munda; grand Sandhi Puja conducted during the transition between Ashtami and Navami.
Presiding deity Goddess Mahagauri & Chamunda Durga
Observed on Ashvina Shukla Ashtami. Sandhi Puja is performed in the 48-minute window (last 24 mins of Ashtami and first 24 mins of Navami).
महाशिवरात्रिः
The Supreme Great Night of Lord Shiva; cosmic Lingodbhava manifestation at midnight; four-prahar continuous Rudrabhishekam with Bilva leaves, sleepless vigil (Jagarana), and Nirjala fast.
Presiding deity Lord Parameshvara Shiva
Observed on Magha Krishna Chaturdashi overlapping Nishitha Kala (8th muhurta of night, around midnight). Even if Chaturdashi covers only one ghati of Nishitha, that day is chosen over Trayodashi.
महालय अमावास्या (सर्वपितृ मोक्ष)
The culmination of Pitru Paksha fortnight; supreme day for offering Tila Tarpana, Pinda Dana, and Shraddha to liberate all known and unknown departed ancestors.
Presiding deity Pitru Devatas & Lord Yama
Observed on Bhadrapada/Ashvina Amavasya overlapping Aparahna Kala (afternoon period, Kutapa Muhurta).
मकरसंक्रान्तिः (उत्तरायण पुण्यकालः)
Solar transition into Makara (Capricorn) marking the start of Uttarayana (the cosmic daytime of the Devas); boiling newly harvested rice and sesame-jaggery (Til-Gul).
Presiding deity Surya Bhagavan & Sri Maha Vishnu
Observed on the day Sun enters Makara before sunset. If ingress occurs after sunset, the holy Punya Kala is observed on the following morning as mandated by Nirnaya Sindhu.
नागपञ्चमी
Reverence offered to serpent guardians (Ananta, Vasuki, Shesha, Padma, Kambala, Karkotaka, Ashvatara, Dhritarashtra, Shankhapala, Takshaka). Removes Sarpa Dosha and brings family peace.
Presiding deity Naga Devatas & Lord Shiva
Observed on Shravana Shukla Panchami. Nirnaya Sindhu prescribes Shashthi-viddha Panchami over Chaturthi-viddha.
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