{"id":"vidhyamitra:city-day:vellore:1981-10-25:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/vellore/1981-10-25","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-10-25","date_display":"October 25, 1981 CE","panchanga":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1981,"month":10,"day":25,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444902.770833,"kali_year":5083,"ahargana":1856437.2708,"sun":{"sidereal_longitude":187.2791,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":155.263,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":327.9838,"elapsed_within_tithi_degrees":3.9838},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":155.263,"elapsed_within_degrees":8.5963},"yoga":{"number":26,"name":"Indra","sum_longitude":342.5421},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"sky":{"method":"Sūrya-Siddhāntic Bhāskara-II 4-step iteration with atan2-based śīghra + varying peripheries + lunar latitude","engine_version":"3.0 (Pūrṇa — complete SS implementation)","tradition_sources":"Āryabhaṭīya 499 CE → SS Ch.1-5 Burgess 1860 → Siddhānta-Śiromaṇi Bhāskara II 1150 → Tantrasaṅgraha Nīlakaṇṭha 1501","input":{"year":1981,"month":10,"day":25,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444902.770833,"ahargana":1856437.2708,"kali_year":5083,"ayanamsa_lahiri":23.599,"grahas":{"sun":{"sidereal_longitude":187.94399199999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":156.47169200000008,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false,"latitude":3.8252},"mars":{"sidereal_longitude":128.95649200000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":175.529992,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":179.87709199999995,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":234.50679200000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":171.22449200000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":97.0196,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":277.0196,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false}},"panchang":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1981,"month":10,"day":25,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444902.770833,"kali_year":5083,"ahargana":1856437.2708,"sun":{"sidereal_longitude":187.2791,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":155.263,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":327.9838,"elapsed_within_tithi_degrees":3.9838},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":155.263,"elapsed_within_degrees":8.5963},"yoga":{"number":26,"name":"Indra","sum_longitude":342.5421},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.825,"elongation":32.016},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.825,"opposition_distance":147.984}},"eclipse_window_40days":[]},"city":{"slug":"vellore","name":"Vellore, Tamil Nadu","lat":12.9165,"lon":79.1325,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"vellore","name":"Vellore, Tamil Nadu","lat":12.9165,"lon":79.1325,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"sunriseLocal":"06:05","sunsetLocal":"17:50","solarNoonLocal":"11:57","dayLengthHours":11.743758018648059,"dayLengthDisplay":"11 Hours 44 Mins 38 Secs","nightLengthDisplay":"12 Hours 15 Mins 22 Secs","moonriseLocal":"03:49","moonsetLocal":"15:54","rahuKala":{"name":"Rāhu Kāla","start":"16:21","end":"17:50","startHours":16.35782827254359,"endHours":17.825798024874597,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:57","end":"13:25","startHours":11.953919015550568,"endHours":13.421888767881576,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:53","end":"16:21","startHours":14.889858520212584,"endHours":16.35782827254359,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:49","end":"09:13","startHours":8.822250210577753,"endHours":9.213708811199355,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:34","end":"06:53","startHours":6.571363257003542,"endHours":6.884530137500823,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:34","end":"12:21","startHours":11.562460414928966,"endHours":12.34537761617217,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:31","end":"05:18","startHours":4.516205603740131,"endHours":5.299122804983336,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:06","end":"06:05","startHours":5.1033935046725345,"endHours":6.082040006226539,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:55","end":"14:42","startHours":13.911212018658578,"endHours":14.694129219901782,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:38","end":"18:02","startHours":17.625798024874598,"endHours":18.025798024874597,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:50","end":"18:19","startHours":17.825798024874597,"endHours":18.3151212756516,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:35","end":"19:20","startHours":17.575798024874597,"endHours":19.325798024874597,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:34","end":"00:21","startHours":23.562460414928967,"endHours":24.34537761617217,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:05","end":"07:33","startHours":6.082040006226539,"endHours":7.550009758557547,"quality":"inauspicious"},{"name":"Chala","start":"07:33","end":"09:01","startHours":7.550009758557547,"endHours":9.017979510888555,"quality":"neutral"},{"name":"Labha","start":"09:01","end":"10:29","startHours":9.017979510888555,"endHours":10.485949263219561,"quality":"auspicious"},{"name":"Amṛta","start":"10:29","end":"11:57","startHours":10.485949263219561,"endHours":11.953919015550568,"quality":"auspicious"},{"name":"Kāla","start":"11:57","end":"13:25","startHours":11.953919015550568,"endHours":13.421888767881576,"quality":"inauspicious"},{"name":"Śubha","start":"13:25","end":"14:53","startHours":13.421888767881576,"endHours":14.889858520212584,"quality":"auspicious"},{"name":"Roga","start":"14:53","end":"16:21","startHours":14.889858520212584,"endHours":16.35782827254359,"quality":"inauspicious"},{"name":"Udveg","start":"16:21","end":"17:50","startHours":16.35782827254359,"endHours":17.825798024874597,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:50","end":"19:21","startHours":17.825798024874597,"endHours":19.35782827254359,"quality":"auspicious"},{"name":"Roga","start":"19:21","end":"20:53","startHours":19.35782827254359,"endHours":20.889858520212584,"quality":"inauspicious"},{"name":"Udveg","start":"20:53","end":"22:25","startHours":20.889858520212584,"endHours":22.421888767881576,"quality":"inauspicious"},{"name":"Chala","start":"22:25","end":"23:57","startHours":22.421888767881576,"endHours":23.953919015550568,"quality":"neutral"},{"name":"Labha","start":"23:57","end":"01:29","startHours":23.953919015550568,"endHours":25.48594926321956,"quality":"auspicious"},{"name":"Amṛta","start":"01:29","end":"03:01","startHours":25.48594926321956,"endHours":27.01797951088855,"quality":"auspicious"},{"name":"Kāla","start":"03:01","end":"04:33","startHours":27.01797951088855,"endHours":28.550009758557547,"quality":"inauspicious"},{"name":"Śubha","start":"04:33","end":"06:05","startHours":28.550009758557547,"endHours":30.08204000622654,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:05","end":"07:05","startHours":6.082040006226539,"endHours":7.082040006226539,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:05","end":"08:05","startHours":7.082040006226539,"endHours":8.082040006226539,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:05","end":"09:05","startHours":8.082040006226539,"endHours":9.082040006226539,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:05","end":"10:05","startHours":9.082040006226539,"endHours":10.082040006226539,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:05","end":"11:05","startHours":10.082040006226539,"endHours":11.082040006226539,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:05","end":"12:05","startHours":11.082040006226539,"endHours":12.082040006226539,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:05","end":"13:05","startHours":12.082040006226539,"endHours":13.082040006226539,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:05","end":"14:05","startHours":13.082040006226539,"endHours":14.082040006226539,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:05","end":"15:05","startHours":14.082040006226539,"endHours":15.082040006226539,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:05","end":"16:05","startHours":15.082040006226539,"endHours":16.08204000622654,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:05","end":"17:05","startHours":16.08204000622654,"endHours":17.08204000622654,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:05","end":"18:05","startHours":17.08204000622654,"endHours":18.08204000622654,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:05","end":"19:05","startHours":18.08204000622654,"endHours":19.08204000622654,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:05","end":"20:05","startHours":19.08204000622654,"endHours":20.08204000622654,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:05","end":"21:05","startHours":20.08204000622654,"endHours":21.08204000622654,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:05","end":"22:05","startHours":21.08204000622654,"endHours":22.08204000622654,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:05","end":"23:05","startHours":22.08204000622654,"endHours":23.08204000622654,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:05","end":"00:05","startHours":23.08204000622654,"endHours":24.08204000622654,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:05","end":"01:05","startHours":24.08204000622654,"endHours":25.08204000622654,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:05","end":"02:05","startHours":25.08204000622654,"endHours":26.08204000622654,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:05","end":"03:05","startHours":26.08204000622654,"endHours":27.08204000622654,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:05","end":"04:05","startHours":27.08204000622654,"endHours":28.08204000622654,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:05","end":"05:05","startHours":28.08204000622654,"endHours":29.08204000622654,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:05","end":"06:05","startHours":29.08204000622654,"endHours":30.08204000622654,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"North-East","anandadiYoga":{"name":"Maitra","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-12.009217183810296,"eotMinutes":16.234859066965946,"ayanamsa":23.599}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Kārtika","lunar_month_paksha_full":"Kārtika Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Kārtika","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Kārtika Kṛṣṇa Trayodaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"dhanteras","name":"Dhanteras (Dhanvantari Jayantī)","name_sanskrit":"धनतेरस / धन्वन्तरि जयन्ती","tradition":"Pan-Hindu","associated_deity":"Dhanvantari (Āyurveda-deva, avatāra of Viṣṇu)","significance":"Birth of Dhanvantari from samudra-mathana with amṛta-kalaśa. Day 1 of Diwali.","vrata":true,"detection":{"tithi_number":28,"tithi_paksha":"Kṛṣṇa","lunar_month":"Kārtika"},"precedence":2,"sources":["Bhāgavata 8.8.32-34"]},{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"vellore"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga October 25, 1981 CE · Vellore, Tamil Nadu · Vidhyamitra","description":"October 25, 1981 CE for Vellore, Tamil Nadu: Kṛṣṇa Trayodaśī, sūryodaya 06:05, sūryāsta 17:50.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/vellore/1981-10-25","hreflang_alternates":{"en":"https://vidhyamitra.com/city/vellore/1981-10-25","sa":"https://sa.vidhyamitra.com/city/vellore/1981-10-25","hi":"https://hi.vidhyamitra.com/city/vellore/1981-10-25","x-default":"https://vidhyamitra.com/city/vellore/1981-10-25"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T00:43:53.639Z","verification":{"type":"multi-marker","confidence":"canonical"}},{"pillar":"Vidhyamitra-Tier2","pillar_version":"0.1.0","method":"Spherical astronomy + Lahiri ayanamsa + standard solar declination + EoT correction","retrieved_at":"2026-06-02T00:43:53.639Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T00:43:53.639Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}