Makara sankranti — Sun's sidereal ingress into Capricorn. Marks the start of Uttarayana and the Thai month. Traditionally observed across four days starting with Bhogi.

Magha Krishna Chaturdashi — the Great Night of Shiva. Observed with night-long vigil through the four jaama timings, with abhishekam and Rudram chanting.

Magha Shukla Panchami — dedicated to Saraswati. Books, instruments, and tools blessed; first letters traced for children.

Pushya nakshatra in the Tamil month of Thai — major Murugan/Karthikeya festival. Spear-piercing kavadi processions in Tamil temples and diaspora communities (Malaysia, Singapore, Mauritius).

Phalguna Purnima — the bonfire night before Holi. Commemorates the burning of Holika.

Phalguna Krishna Pratipada — the festival of colors. Day after Holika Dahan; spring's arrival.

Chaitra Shukla Navami — birth of Sri Rama. Observed with fasting, Ramayana recitation, and afternoon arati.

Chaitra Purnima — birth of Hanuman. Hanuman Chalisa recitation, Sundara Kanda parayanam.

Mesha sankranti — Sun's sidereal ingress into Aries marks the start of the Tamil solar year and the month of Chithirai.

Vaisakha Shukla Tritiya — 'undiminishing' tithi. Considered an auspicious day for new beginnings, gold purchases, and donations regardless of other panchang factors.

Chitra nakshatra in the Tamil month of Chithirai — festival of Chitragupta, Yama's accountant. Observed with mother-Earth honoring.

Vaisakha Purnima — Buddha's birth, enlightenment, and parinirvana. Major observance for Buddhists; also auspicious in Hindu tradition.

Ashada Purnima — honor one's guru. Traditionally Vyasa's birthday; Buddhists mark Buddha's first sermon.

18th day of the Tamil month of Aadi — riverine festival celebrating monsoon flow. Offerings made at riverbanks (Kaveri, Vaigai).

Shravana nakshatra in the Tamil month of Aavani — annual renewal of the sacred thread (Yajnopavita). Yajur, Rig, and Sama Veda Brahmins observe at gotra-specific timings.

Bhadrapada Krishna Ashtami — birth of Sri Krishna. Observed with overnight vigil, Bhagavata Purana recitation, midnight arati at the moment of birth.

Bhadrapada Amavasya — the new moon ending Mahalaya Paksha, the 16-day ancestor observance. Tarpanam offered for forgotten ancestors.

Bhadrapada Shukla Chaturthi — Ganesha's appearance. 10-day observance ending in visarjan (immersion). Especially major in Maharashtra.

Ashwin Shukla Dashami — the 10th day after Navratri. Celebrates Durga's victory over Mahishasura (in eastern India) and Rama's victory over Ravana (in northern India).

Ashwin Shukla 1 — start of the autumn 9-day Devi observance, the most widely-celebrated Navratri. Each day's color and devi form follows the standard sequence (Shailaputri → Brahmacharini → ...).

Karthika Krishna Trayodashi — the first day of the Diwali sequence. Dedicated to Dhanvantari (deva of medicine) and Kubera (lord of wealth). Traditional day to purchase metals.

Karthika Amavasya — the festival of lights. Lakshmi Puja in homes; Kali Puja in Bengal. Diyas lit; firecrackers traditionally; sweets exchanged.

Karthika Shukla Pratipada — day after Diwali. Commemorates Krishna lifting Govardhan hill. Annakut (mountain of food) offered.

Karthika Shukla Dwitiya — sister-brother bond observance, sister applies tilak and brother offers gifts.

Krittika nakshatra in the Tamil month of Karthigai — the festival of lights observed primarily in Tamil Nadu, predating Diwali in this tradition. Lamps lit in homes and temples.

Shukla Ekadashi in the Tamil month of Margazhi — the day Vaikunta's gateway is said to open. Major Vishnu observance with all-day fast, Tirupati and Srirangam temples especially significant.