इस महीने का हर वैदिक त्योहार, एकादशी, पूर्णिमा, अमावस्या और संक्रांति — पंचांग इंजन से लाइव गणना, दुर्लभता के हिसाब से बँटा, प्रमाण सहित। 87 कार्यक्रम: 0 बड़े, 35 मध्यम, 52 आवर्ती।
Narada Purana — Uttarardha, Ekadashi-vrata prakaranam, parana/dwadashi section'Yadi dvitiya din dvadashi hai to pehle din ki dashami-viddha ekadashi bhi niṣiddha hi hai (isliye aisi paristhiti mein dvadashi ko vrata karna chahiye).'
Muhurta Chintamani — Shubhashubha Prakarana (karana enumeration), verses 23-24 (Pyarelal Mishra Hindi ed., lines 81-122 in muhurta_cintamani slug) — 'श्रीवत्साख्यो वज्रकं मुद्गरश्च ... चरसुस्थिराख्यप्रवर्धमानाः फलदाः स्वनाम्ना'Names all 11 karanas with their phala — Bava (chara, first) is the auspicious chara-karana for new beginnings; karanas grouped as 'phaladah svanama' (effects per their names).
Muhurta Chintamani — Nakshatra-prakarana (tyajya nakshatra and yoga), verse 34 (Pyarelal Mishra Hindi ed., lines 983-1007) — 'विष्कम्भवज्रवटिकात्रयमेव वर्ज्यम्'Vishkambha (with vajra) — first three vatikas (ghatikas) explicitly forbidden in shubha-karma; the yoga's name literally means 'obstruction'.
Muhurta Chintamani — Shubhashubha Prakarana (karana enumeration), verses 23-24 (Pyarelal Mishra Hindi ed., lines 81-122 in muhurta_cintamani slug) — 'श्रीवत्साख्यो वज्रकं मुद्गरश्च ... चरसुस्थिराख्यप्रवर्धमानाः फलदाः स्वनाम्ना'Names all 11 karanas with their phala — Bava (chara, first) is the auspicious chara-karana for new beginnings; karanas grouped as 'phaladah svanama' (effects per their names).
Muhurta Chintamani — Shubhashubha-prakaranam (tyajya nakshatra-yoga section), verses 34-35'Parigha-rdhaṁ pancha shule shaṭ cha ganda-atigandayoh, vyaghate nava-naadyash cha varjyaah sarveshu karmasu.' Ganda and Atiganda yogas explicitly listed with 6 nadis to be avoided in all auspicious works.
Muhurta Chintamani — Shubhashubha Prakarana (karana enumeration), verses 23-24 (Pyarelal Mishra Hindi ed., lines 81-122 in muhurta_cintamani slug) — 'श्रीवत्साख्यो वज्रकं मुद्गरश्च ... चरसुस्थिराख्यप्रवर्धमानाः फलदाः स्वनाम्ना'Names all 11 karanas with their phala — Bava (chara, first) is the auspicious chara-karana for new beginnings; karanas grouped as 'phaladah svanama' (effects per their names).
Sun enters a new rashi (solar ingress). All Sankrantis are considered punya kala. Sacred bath, surya arghya, tila dana, and charity are prescribed. The punya kala extends 16 ghatikas (~6.5 hours) before and after the exact transition moment.
Narada Purana — Uttarardha, Ekadashi-vrata prakaranam, parana/dwadashi section'Yadi dvitiya din dvadashi hai to pehle din ki dashami-viddha ekadashi bhi niṣiddha hi hai (isliye aisi paristhiti mein dvadashi ko vrata karna chahiye).'
Supreme yoga for spiritual initiation and starting education. Also known as Guru Pushya Amrit Yoga since Thursday + Pushya is inherently an Amrit Siddhi combination
Phaladeepika — Upagraha-prakarana (calculation of dhuma, vyatipata, parivesha, indrachapa, ketu), verse 5 (formula for vyatipata from solar position; Hindi-Alt ed., around lines 22701-22750)Vyatipata = (Sun + 4r 13°20') subtracted from 12 rashis — defined as 'a-prakasha-graha' (invisible graha).
Narada Purana — Purvabhaga, karana-prakarana, verse 124Enumerates Shakuni, Naga, Chatushpada, Kimstughna as the four sthira (fixed) karanas of the lunar month.
Muhurta Chintamani — Shubhashubha-prakarana, Shunyatithi-chakra, verse 10Masa-wise shunya tithis enumerated; 4/9/14 (Rikta tithis) fall in the shunya set and Tuesday compounds the void.
Muhurta Chintamani — Shubhashubha Prakarana (karana enumeration), verses 23-24 (Pyarelal Mishra Hindi ed., lines 81-122 in muhurta_cintamani slug) — 'श्रीवत्साख्यो वज्रकं मुद्गरश्च ... चरसुस्थिराख्यप्रवर्धमानाः फलदाः स्वनाम्ना'Names all 11 karanas with their phala — Bava (chara, first) is the auspicious chara-karana for new beginnings; karanas grouped as 'phaladah svanama' (effects per their names).
Muhurta Chintamani — Nakshatra-prakarana (tyajya nakshatra and yoga), verse 34 (Pyarelal Mishra Hindi ed., lines 983-1007) — 'विष्कम्भवज्रवटिकात्रयमेव वर्ज्यम्'Vishkambha (with vajra) — first three vatikas (ghatikas) explicitly forbidden in shubha-karma; the yoga's name literally means 'obstruction'.
Muhurta Chintamani — Shubhashubha Prakarana (karana enumeration), verses 23-24 (Pyarelal Mishra Hindi ed., lines 81-122 in muhurta_cintamani slug) — 'श्रीवत्साख्यो वज्रकं मुद्गरश्च ... चरसुस्थिराख्यप्रवर्धमानाः फलदाः स्वनाम्ना'Names all 11 karanas with their phala — Bava (chara, first) is the auspicious chara-karana for new beginnings; karanas grouped as 'phaladah svanama' (effects per their names).
Narada Purana
— Purvabhaga, Ashtami-vrata enumeration
, Month-wise Ashtami vratas (sankshipta ed., around lines 67901-67950)
Devi Bhagavata — Skandha 3, Navaratri-vidhi (importance of Ashtami), Ashtami pujan prescription (Vol. 1 Gita Press ed., around lines 45751-45800)If unable to do full nine-day Navaratri, Ashtami tithi must be observed; references Daksha-yajna context.
Matsya Purana — Surya-vamsha-varnana (origin of Vishti/Bhadra), Vishti as Chhaya's daughter (Gita Press ed., around lines 5851-5900)Vishti (Bhadra) — bhayankara-rupavali tritiya kanya — is established as kala-karana-svarupa, the personification of the inauspicious karana.
Phaladeepika — Santanachinta-prakarana (use of Vishti-karana in muhurta), verse 15 (Hindi-Alt ed., around lines 9801-9850)Phaladeepika explicitly names Vishti-karana as varjya for shubha-karya and for santana-prashna; classical avoidance rule.
Narada Purana — Purvabhaga, Karana-jnana-vidhi (11 karanas including Vishti), around verses 124-125 (sankshipta ed., around lines 34051-34100)Lists the 7 chara + 4 sthira karanas including Vishti (#7) — formula to determine karana from tithi-number.
Twelve-month Navami-vrata catalogue — every Navami is sacred to Durga/Chandika/Kumari in some form.
Devi Bhagavata — Tritiya-skandha (Sharad/Vasanta Navaratri narrative), Tritiya-skandha, Sudarshana-Subahu Navaratri narrative (Gita Press Vol.1, around lines 44951-45000) — 'नवरात्रेषु सर्वेषु ... अर्चनं हवनं यागं देव्या'Each Navami caps the Navaratri sequence; the day is fixed for Devi-arcana, havana, yaga.
Brahma listed at position 25 of the Anandadi yogas; each yoga is said to give 'svanama-sadrsha phala', so Brahma yoga gives creative / spiritual / Brahma-loka phala.
Shiva Purana — Kotirudra-samhita, Tandi Sahasranama prelude, verses 47-48Tandi (a brahma-yogi) is named as the composer of the Shiva Sahasranama in brahma-yoga — establishes the spiritual-creative significance of the yoga.
Indra is named among the 27 nitya-yogas; classical muhurta treats Indra-yoga as auspicious for leadership and power karyas.
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Narada Purana — Purvabhaga, Ekadashi-vrata section, Ekadashi-vrata-mahatmya (sankshipta ed., text around lines 14901-14950)Detailed rules on dashami-viddha vs dvadashi-viddha Ekadashi, fasting and parana.
Brahma Vaivarta Purana — Krishna-janma-khanda, Ekadashi-vrata prescription, Ekadashi-upavasa section (sankshipta ed., text around lines 71651-71700)All Vaishnavas, yatis, widows, brahmacharis are to fast on every Ekadashi.
Mula/Jyeshtha/Ardra/Ashlesha + Saturday classed as 'tikshna-daruna' — fit for abhichara, ghata, pashu-damana, root-breaking work; Tuesday (Mars) is the krura-vara equivalent of Saturday for such karma.
Matsya Purana — Adbhuta-shanti-adhyaya (Mula-nakshatra adbhutas), verse 27 (Gita Press ed., lines 113101-113150) — 'मूले वरुणदैवत्ये ये भवन्त्यद्भुतास्तथा ... वारुणी ... महाशान्तिः'Establishes Mula's Varuna-daivatya and the prescribed Varuni-mahashanti — confirms Mula's intense, root-disturbing nature suited to Tuesday's Mars-energy for research and abhichara.
Narada Purana — Purvabhaga, Jyotish-prakarana (ninda-yoga enumeration), ninda-yoga section (Sankshipta ed., lines 41901-41950) — 'वैधृति और व्यतीपात ये दोनों महापात हैं, इन दोनोंको शुभ कार्योमें सदा त्याग देना चाहिये'Classes vaidhriti+vyatipata as the two great mahapatas; recommends pitru-karma instead during these.
BPHS — Panchanga-sadhana / Karana-prakarana, standard BPHS section on the 11 karanas (Bava-Balava-Kaulava ... Naga-Kimstughna)BPHS lists the chara-karanas (Bava through Vishti) as repeated 8 times across the 30 tithi-halves; Bava is the first and most auspicious.
Verses 28-29 enumerate the full vara-nakshatra table (Sun: Hasta/Mula/Uttaraphalguni/Uttarashadha/Uttarabhadrapada/Pushya/Ashvini; Moon: Shravana/Rohini/Mrigashira/Pushya/Anuradha; Mars: Ashvini/Uttarabhadrapada/Krittika/Ashlesha; etc.) -- matches our table exactly.
, verses 212-3, 213-4 (Sankshipta ed., lines 41901-41950) — Vishkambha listed as first of 27 yogas; later ninda-yoga group enumerates vishkambha among tyajya-portions
Vishkambha is the 1st nitya-yoga (svami: Yama); first 3 ghatikas to be avoided in all auspicious work.
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Muhurta Chintamani — Samskara-prakarana (Pradosha-lakshana), verse 55 (Pyarelal Mishra Hindi ed., lines 3616-3650) — 'अर्कतर्कत्रितिथिषु प्रदोषः स्यात्'Defines pradosha-kala as the half-prahar around sunset on Trayodashi, Chaturdashi, Pratipad and other listed tithis.
Skanda Purana — Pradosha-vrata-mahatmya (Chandrasena and Shrikara legend), section on Pradosha-shivapujana (Sankshipta ed., lines 88951-89000)Anjananandana Hanuman teaches the gopa Shrikara the discipline of Pradosha Shiva worship.
Brahma Vaivarta Purana — Prakriti Khanda (Lakshmi-prakatya-akhyana, Adhyaya 14), Lakshmi-mahatmya verses (Lakshmi as Shukravara-adhidevata implicit; festival observance on Purnima)
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Narada Purana — Purvabhaga, Purnima-vrata-prakarana, opening section (masa-wise Purnima vratas)Sanatana-narada vada on Purnima vratas through the year.
Matsya Purana — Parva-sandhi and Purnima-tithi prakarana, section on pakshanta-sandhi and pournamasika
Verses 28-29 enumerate the full vara-nakshatra table (Sun: Hasta/Mula/Uttaraphalguni/Uttarashadha/Uttarabhadrapada/Pushya/Ashvini; Moon: Shravana/Rohini/Mrigashira/Pushya/Anuradha; Mars: Ashvini/Uttarabhadrapada/Krittika/Ashlesha; etc.) -- matches our table exactly.
Matsya Purana — Surya-vamsha-varnana (origin of Vishti/Bhadra), Vishti as Chhaya's daughter (Gita Press ed., around lines 5851-5900)Vishti (Bhadra) — bhayankara-rupavali tritiya kanya — is established as kala-karana-svarupa, the personification of the inauspicious karana.
Phaladeepika — Santanachinta-prakarana (use of Vishti-karana in muhurta), verse 15 (Hindi-Alt ed., around lines 9801-9850)Phaladeepika explicitly names Vishti-karana as varjya for shubha-karya and for santana-prashna; classical avoidance rule.
Narada Purana — Purvabhaga, Karana-jnana-vidhi (11 karanas including Vishti), around verses 124-125 (sankshipta ed., around lines 34051-34100)Lists the 7 chara + 4 sthira karanas including Vishti (#7) — formula to determine karana from tithi-number.
Narada Purana — Purvabhaga, Dvitiya-vrata section (Ashunyashayana-vrata), month-wise Dvitiya-vrata (Sankshipta ed., lines 65701-65750) — 'अशुन्यशयन ... चन्द्रमाके लिये अर्घ्यदान'Shravana-Krishna Dvitiya = Ashunyashayana-vrata to Vishnu-Lakshmi with chandra-arghya; Kartika-shukla Dvitiya = Yamadvitiya.
Bhavishya Purana — Uttara-parva, Chaturthi-vrata-kalpa (Angaraka-chaturthi-vrata-varnana), Chaturthi-vrata chapter (DLI Hindi ed., around lines 70101-70150)Krishna-Yudhishthira samvada on Chaturthi vrata including Angaraka Chaturthi.
BPHS — Panchanga-sadhana / Karana-prakarana, standard BPHS section on the 11 karanas (Bava-Balava-Kaulava ... Naga-Kimstughna)BPHS lists the chara-karanas (Bava through Vishti) as repeated 8 times across the 30 tithi-halves; Bava is the first and most auspicious.
'Brihaspati-vara ko Pushya, Shukra-vara ko Revati aur Shanivara ko Rohini ho to siddhi-yoga hota hai.' Revati's completion significance on Buddha-vara (Mercury-day for Mercury's exaltation sign Kanya-bordering Revati) follows the same vara-nakshatra mela principle.
Muhurta Chintamani — Shubhashubha-prakaranam (vara-nakshatra mrityu-yoga chart), verse 5Revati is the Wednesday dagdha-nakshatra in some traditions but is universally treated as the completion-nakshatra; the present rule reflects the latter usage.
BPHS — Panchanga-sadhana / Karana-prakarana, standard BPHS section on the 11 karanas (Bava-Balava-Kaulava ... Naga-Kimstughna)BPHS lists the chara-karanas (Bava through Vishti) as repeated 8 times across the 30 tithi-halves; Bava is the first and most auspicious.
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Shiva Purana — Kotirudra Samhita, dasha-shiva-vrata adhyaya, verse 11 (Kalashtami section)'Pratyek ashtami ke [din mein upavaas kar] ratri-kaal mein bhojan karna chahiye, kintu Kalashtami mein vishesha-rupa se [ratri mein bhi] bhojan ka tyaga karna chahiye.' Kalashtami explicitly named; Saturday-Ashtami is the Kalabhairava-prakata variant.
Narada Purana
— Purvabhaga, Ashtami-vrata enumeration
, Month-wise Ashtami vratas (sankshipta ed., around lines 67901-67950)
Devi Bhagavata — Skandha 3, Navaratri-vidhi (importance of Ashtami), Ashtami pujan prescription (Vol. 1 Gita Press ed., around lines 45751-45800)If unable to do full nine-day Navaratri, Ashtami tithi must be observed; references Daksha-yajna context.
Verses 28-29 enumerate the full vara-nakshatra table (Sun: Hasta/Mula/Uttaraphalguni/Uttarashadha/Uttarabhadrapada/Pushya/Ashvini; Moon: Shravana/Rohini/Mrigashira/Pushya/Anuradha; Mars: Ashvini/Uttarabhadrapada/Krittika/Ashlesha; etc.) -- matches our table exactly.
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Narada Purana — Purvabhaga, Ekadashi-vrata section, Ekadashi-vrata-mahatmya (sankshipta ed., text around lines 14901-14950)Detailed rules on dashami-viddha vs dvadashi-viddha Ekadashi, fasting and parana.
Brahma Vaivarta Purana — Krishna-janma-khanda, Ekadashi-vrata prescription, Ekadashi-upavasa section (sankshipta ed., text around lines 71651-71700)All Vaishnavas, yatis, widows, brahmacharis are to fast on every Ekadashi.
Matsya Purana — Surya-vamsha-varnana (origin of Vishti/Bhadra), Vishti as Chhaya's daughter (Gita Press ed., around lines 5851-5900)Vishti (Bhadra) — bhayankara-rupavali tritiya kanya — is established as kala-karana-svarupa, the personification of the inauspicious karana.
Phaladeepika — Santanachinta-prakarana (use of Vishti-karana in muhurta), verse 15 (Hindi-Alt ed., around lines 9801-9850)Phaladeepika explicitly names Vishti-karana as varjya for shubha-karya and for santana-prashna; classical avoidance rule.
Narada Purana — Purvabhaga, Karana-jnana-vidhi (11 karanas including Vishti), around verses 124-125 (sankshipta ed., around lines 34051-34100)Lists the 7 chara + 4 sthira karanas including Vishti (#7) — formula to determine karana from tithi-number.
Verses 28-29 enumerate the full vara-nakshatra table (Sun: Hasta/Mula/Uttaraphalguni/Uttarashadha/Uttarabhadrapada/Pushya/Ashvini; Moon: Shravana/Rohini/Mrigashira/Pushya/Anuradha; Mars: Ashvini/Uttarabhadrapada/Krittika/Ashlesha; etc.) -- matches our table exactly.
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Muhurta Chintamani — Samskara-prakarana (Pradosha-lakshana), verse 55 (Pyarelal Mishra Hindi ed., lines 3616-3650) — 'अर्कतर्कत्रितिथिषु प्रदोषः स्यात्'Defines pradosha-kala as the half-prahar around sunset on Trayodashi, Chaturdashi, Pratipad and other listed tithis.
Skanda Purana — Pradosha-vrata-mahatmya (Chandrasena and Shrikara legend), section on Pradosha-shivapujana (Sankshipta ed., lines 88951-89000)Anjananandana Hanuman teaches the gopa Shrikara the discipline of Pradosha Shiva worship.
Sources (2)
Muhurta Chintamani — Shubhashubha Prakarana (Sarvarthasiddhi-yoga enumeration), verses 28-29 (Pyarelal Mishra Hindi ed., lines 907-927) — Thursday + Pushya listed in Sarvarthasiddhi-yogaSame verse-set lists Sunday-Hasta, Monday-Shravana, Wednesday-Rohini etc.; Thursday-Pushya is the strongest pairing.
The 7-vara amrita-siddhi mapping is given as part of the wider Anandadi-27 yoga corpus and the sarvartha-siddhi enumeration.
Narada Purana — Purvabhaga, Pratham Pada (yoga-prakarana), verses 242-244 (sarvartha-siddhi-yoga -- same vara-nakshatra pairs)
Parashara Smriti — Madhaviya-vritti, Dana-kala-nirupana, Section on vyatipata as inauspicious yoga / sankrama (Islampurkar 1894 ed., around lines 40233-40259)Mahavyatipata defined; cited alongside ayana and vishuva as auspicious-dana times despite the yoga itself being inauspicious for new beginnings.
Ashlesha's presiding devata is Sarpa/Naga; the Ashlesha-Amavasya combination is the canonical Naga-tarpana day (observed as Aayilyam in Kerala traditions).
Matsya Purana — Anga-puja adhyaya (Shiva-anga-nyasa with nakshatra-correspondence), Ashlesha verse ('Vibudhapriyaaya namah')Matsya Purana's nakshatra-anga-puja section assigns Ashlesha to Shiva's matha (head); mythological substrate for Naga-tarpana.
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Skanda Purana — Pitri-kalpa / Tithi-pravachana, amavasya definition section'Yogon mein vyatipata, nakshatron mein shravana, tithiyon mein amavasya aur purnima tatha sankranti-kala -- ye sab dana-karma mein pavitra mane gaye hain.' Amavasya named first among agnishvattadi pitarana priya tithis.
Muhurta Chintamani — Samvatsara-prakarana, Sun-avastha on Sankranti, verse 13Sun in Kimstughna karana described as 'urdhva' (upright, sama) — 'sama: shreshtha ihardhavarshane', i.e. neutral-to-mildly auspicious.
Verses 28-29 enumerate the full vara-nakshatra table (Sun: Hasta/Mula/Uttaraphalguni/Uttarashadha/Uttarabhadrapada/Pushya/Ashvini; Moon: Shravana/Rohini/Mrigashira/Pushya/Anuradha; Mars: Ashvini/Uttarabhadrapada/Krittika/Ashlesha; etc.) -- matches our table exactly.
Lists 28 anandadi yogas: 'siddhi' named explicitly as one yielding karya-siddhi by its own name (siddha-yoga is the 21st nitya-yoga).
Narada Purana — Purvabhaga, Anandadi-yoga section, Anandadi 28-yoga list (sankshipta ed., around lines 42101-42150)Siddhi yoga #19 in Anandadi enumeration; 'svanama-phaladayaka' — gives fruit per its name.
Narada Purana — Purvabhaga, Dvitiya-vrata section (Ashunyashayana-vrata), month-wise Dvitiya-vrata (Sankshipta ed., lines 65701-65750) — 'अशुन्यशयन ... चन्द्रमाके लिये अर्घ्यदान'Shravana-Krishna Dvitiya = Ashunyashayana-vrata to Vishnu-Lakshmi with chandra-arghya; Kartika-shukla Dvitiya = Yamadvitiya.
, verse 57 (Pyarelal Mishra Hindi ed., lines 2174-2196) — Sadhya not in the tyajya-list 'व्यतिपातवैधृति... परिघव्यावातगण्डयोग ... विष्टि ...'
Sadhya is conspicuously absent from the canonical 6-ninda-yoga list (vyatipata, vaidhriti, parigha, vyaghata, ganda, vajra), placing it among shubha-yogas — 'achievable goals' interpretation follows the literal 'sadhya' (to be accomplished).
, Ganesha-janma and Shiva's varadana (Gita Press Part 1, lines 87101-87150) — 'विघ्नोंके नष्ट करनेमें तुम्हारा नाम सर्वश्रेष्ठ होगा ... मेरे सम्पूर्ण गणोंके अध्यक्ष'
Canonical Ganesha-janma: Shiva's varadana to Parvati's son — naming him Vighnesha, lord of ganas, established him as foremost-worshipped on Bhadrapada Shukla Chaturthi.
Narada Purana — Purvabhaga, Chaturthi-vrata (Bhadrapada-Chaturthi), Bhadrapada-Chaturthi section (Sankshipta ed., lines 66001-66050, 66401-66450) — 'जिस किसी मासमें भी चतुर्थी तिथि रविवार या मङ्गलवारसे युक्त हो तो वह विशेष फल'Twelve-month Chaturthi enumeration; Bhadrapada Shukla Chaturthi is named Ganesh-Chaturthi (Vinayaka-Chaturthi).
Bhavishya Purana — Uttara-parva, Chaturthi-vrata-kalpa (Angaraka-chaturthi-vrata-varnana), Chaturthi-vrata chapter (DLI Hindi ed., around lines 70101-70150)Krishna-Yudhishthira samvada on Chaturthi vrata including Angaraka Chaturthi.
BPHS — Panchanga-sadhana / Karana-prakarana, standard BPHS section on the 11 karanas (Bava-Balava-Kaulava ... Naga-Kimstughna)BPHS lists the chara-karanas (Bava through Vishti) as repeated 8 times across the 30 tithi-halves; Bava is the first and most auspicious.
Brahma listed at position 25 of the Anandadi yogas; each yoga is said to give 'svanama-sadrsha phala', so Brahma yoga gives creative / spiritual / Brahma-loka phala.
Shiva Purana — Kotirudra-samhita, Tandi Sahasranama prelude, verses 47-48Tandi (a brahma-yogi) is named as the composer of the Shiva Sahasranama in brahma-yoga — establishes the spiritual-creative significance of the yoga.
, Pyarelal Mishra ed., around lines 2971-3001 (jatakarma/namakarma section listing Anuradha among auspicious shubha nakshatras)
Anuradha is among auspicious shubha-nakshatras for jatakarma/namakarma; Anuradha is Sani-svami (Saturn's own nakshatra), so Saturday + Anuradha is a vara-svami yoga revered for bhakti and karya-siddhi.
Narada Purana — Purvabhaga, Jyotish-prakarana (ninda-yoga enumeration), ninda-yoga section (Sankshipta ed., lines 41901-41950) — 'वैधृति और व्यतीपात ये दोनों महापात हैं, इन दोनोंको शुभ कार्योमें सदा त्याग देना चाहिये'Classes vaidhriti+vyatipata as the two great mahapatas; recommends pitru-karma instead during these.
, verses 212-3, 213-4 (Sankshipta ed., lines 41901-41950) — Vishkambha listed as first of 27 yogas; later ninda-yoga group enumerates vishkambha among tyajya-portions
Vishkambha is the 1st nitya-yoga (svami: Yama); first 3 ghatikas to be avoided in all auspicious work.
Narada Purana
— Purvabhaga, Ashtami-vrata enumeration
, Month-wise Ashtami vratas (sankshipta ed., around lines 67901-67950)
Devi Bhagavata — Skandha 3, Navaratri-vidhi (importance of Ashtami), Ashtami pujan prescription (Vol. 1 Gita Press ed., around lines 45751-45800)If unable to do full nine-day Navaratri, Ashtami tithi must be observed; references Daksha-yajna context.
BPHS — Panchanga-sadhana / Karana-prakarana, standard BPHS section on the 11 karanas (Bava-Balava-Kaulava ... Naga-Kimstughna)BPHS lists the chara-karanas (Bava through Vishti) as repeated 8 times across the 30 tithi-halves; Bava is the first and most auspicious.