{"id":"vidhyamitra:city-day:howrah:1981-05-12:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/howrah/1981-05-12","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-05-12","date_display":"May 12, 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":5,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444736.770833,"kali_year":5083,"ahargana":1856271.2708,"sun":{"sidereal_longitude":27.6892,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":127.7799,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":100.0907,"elapsed_within_tithi_degrees":4.0907},"nakshatra":{"number":10,"name":"Maghā","pada":3,"moon_longitude":127.7799,"elapsed_within_degrees":7.7799},"yoga":{"number":12,"name":"Dhruva","sum_longitude":155.4692},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":5,"day":12,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444736.770833,"ahargana":1856271.2708,"kali_year":5083,"ayanamsa_lahiri":23.5926,"grahas":{"sun":{"sidereal_longitude":27.646335000000022,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":130.56523500000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false,"latitude":1.6817},"mars":{"sidereal_longitude":19.09973500000001,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":43.712334999999996,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":157.38263499999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":36.953835000000026,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":159.65213500000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":105.8151,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":285.8151,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"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":5,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444736.770833,"kali_year":5083,"ahargana":1856271.2708,"sun":{"sidereal_longitude":27.6892,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":127.7799,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":100.0907,"elapsed_within_tithi_degrees":4.0907},"nakshatra":{"number":10,"name":"Maghā","pada":3,"moon_longitude":127.7799,"elapsed_within_degrees":7.7799},"yoga":{"number":12,"name":"Dhruva","sum_longitude":155.4692},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.682,"elongation":100.091},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.682,"opposition_distance":79.909}},"eclipse_window_40days":[]},"city":{"slug":"howrah","name":"Howrah, West Bengal","lat":22.5958,"lon":88.2636,"tz_offset_hours":5.5,"state":"West Bengal","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"howrah","name":"Howrah, West Bengal","lat":22.5958,"lon":88.2636,"tz_offset_hours":5.5,"state":"West Bengal","country":"IN","tier":"tier-1"},"sunriseLocal":"04:58","sunsetLocal":"18:08","solarNoonLocal":"11:33","dayLengthHours":13.168255365428454,"dayLengthDisplay":"13 Hours 10 Mins 06 Secs","nightLengthDisplay":"10 Hours 49 Mins 54 Secs","moonriseLocal":"12:06","moonsetLocal":"00:44","rahuKala":{"name":"Rāhu Kāla","start":"14:51","end":"16:29","startHours":14.845530846695972,"endHours":16.49156276737453,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:16","end":"09:54","startHours":8.261403163981745,"endHours":9.907435084660303,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"11:33","end":"13:12","startHours":11.55346700533886,"endHours":13.199498926017416,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:03","end":"08:29","startHours":8.041932241224604,"endHours":8.480874086738886,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:31","end":"05:52","startHours":5.518016629517484,"endHours":5.869170105928909,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:07","end":"12:00","startHours":11.114525159824575,"endHours":11.99240885085314,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:13","end":"04:05","startHours":3.2135719405675047,"endHours":4.091455631596068,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:52","end":"04:58","startHours":3.8719847088389274,"endHours":4.969339322624632,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:45","end":"14:38","startHours":13.748176232910268,"endHours":14.626059923938831,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:56","end":"18:20","startHours":17.937594688053085,"endHours":18.337594688053084,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:08","end":"18:41","startHours":18.137594688053085,"endHours":18.686271994945937,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:53","end":"19:38","startHours":17.887594688053085,"endHours":19.637594688053085,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:07","end":"00:00","startHours":23.114525159824577,"endHours":23.992408850853142,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"04:58","end":"06:37","startHours":4.969339322624632,"endHours":6.615371243303189,"quality":"inauspicious"},{"name":"Udveg","start":"06:37","end":"08:16","startHours":6.615371243303189,"endHours":8.261403163981745,"quality":"inauspicious"},{"name":"Chala","start":"08:16","end":"09:54","startHours":8.261403163981745,"endHours":9.907435084660303,"quality":"neutral"},{"name":"Labha","start":"09:54","end":"11:33","startHours":9.907435084660303,"endHours":11.55346700533886,"quality":"auspicious"},{"name":"Amṛta","start":"11:33","end":"13:12","startHours":11.55346700533886,"endHours":13.199498926017416,"quality":"auspicious"},{"name":"Kāla","start":"13:12","end":"14:51","startHours":13.199498926017416,"endHours":14.845530846695972,"quality":"inauspicious"},{"name":"Śubha","start":"14:51","end":"16:29","startHours":14.845530846695972,"endHours":16.49156276737453,"quality":"auspicious"},{"name":"Roga","start":"16:29","end":"18:08","startHours":16.49156276737453,"endHours":18.137594688053085,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:08","end":"19:29","startHours":18.137594688053085,"endHours":19.49156276737453,"quality":"inauspicious"},{"name":"Śubha","start":"19:29","end":"20:51","startHours":19.49156276737453,"endHours":20.845530846695972,"quality":"auspicious"},{"name":"Roga","start":"20:51","end":"22:12","startHours":20.845530846695972,"endHours":22.199498926017412,"quality":"inauspicious"},{"name":"Udveg","start":"22:12","end":"23:33","startHours":22.199498926017412,"endHours":23.55346700533886,"quality":"inauspicious"},{"name":"Chala","start":"23:33","end":"00:54","startHours":23.55346700533886,"endHours":24.9074350846603,"quality":"neutral"},{"name":"Labha","start":"00:54","end":"02:16","startHours":24.9074350846603,"endHours":26.261403163981743,"quality":"auspicious"},{"name":"Amṛta","start":"02:16","end":"03:37","startHours":26.261403163981743,"endHours":27.615371243303187,"quality":"auspicious"},{"name":"Kāla","start":"03:37","end":"04:58","startHours":27.615371243303187,"endHours":28.96933932262463,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"04:58","end":"05:58","startHours":4.969339322624632,"endHours":5.969339322624632,"planetary_lord":"Mars"},{"name":"Hora 2","start":"05:58","end":"06:58","startHours":5.969339322624632,"endHours":6.969339322624632,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"06:58","end":"07:58","startHours":6.969339322624632,"endHours":7.969339322624632,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"07:58","end":"08:58","startHours":7.969339322624632,"endHours":8.96933932262463,"planetary_lord":"Moon"},{"name":"Hora 5","start":"08:58","end":"09:58","startHours":8.96933932262463,"endHours":9.96933932262463,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"09:58","end":"10:58","startHours":9.96933932262463,"endHours":10.96933932262463,"planetary_lord":"Venus"},{"name":"Hora 7","start":"10:58","end":"11:58","startHours":10.96933932262463,"endHours":11.96933932262463,"planetary_lord":"Sun"},{"name":"Hora 8","start":"11:58","end":"12:58","startHours":11.96933932262463,"endHours":12.96933932262463,"planetary_lord":"Mars"},{"name":"Hora 9","start":"12:58","end":"13:58","startHours":12.96933932262463,"endHours":13.96933932262463,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"13:58","end":"14:58","startHours":13.96933932262463,"endHours":14.96933932262463,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"14:58","end":"15:58","startHours":14.96933932262463,"endHours":15.96933932262463,"planetary_lord":"Moon"},{"name":"Hora 12","start":"15:58","end":"16:58","startHours":15.96933932262463,"endHours":16.96933932262463,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"16:58","end":"17:58","startHours":16.96933932262463,"endHours":17.96933932262463,"planetary_lord":"Venus"},{"name":"Hora 14","start":"17:58","end":"18:58","startHours":17.96933932262463,"endHours":18.96933932262463,"planetary_lord":"Sun"},{"name":"Hora 15","start":"18:58","end":"19:58","startHours":18.96933932262463,"endHours":19.96933932262463,"planetary_lord":"Mars"},{"name":"Hora 16","start":"19:58","end":"20:58","startHours":19.96933932262463,"endHours":20.96933932262463,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"20:58","end":"21:58","startHours":20.96933932262463,"endHours":21.96933932262463,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"21:58","end":"22:58","startHours":21.96933932262463,"endHours":22.96933932262463,"planetary_lord":"Moon"},{"name":"Hora 19","start":"22:58","end":"23:58","startHours":22.96933932262463,"endHours":23.96933932262463,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"23:58","end":"00:58","startHours":23.96933932262463,"endHours":24.96933932262463,"planetary_lord":"Venus"},{"name":"Hora 21","start":"00:58","end":"01:58","startHours":24.96933932262463,"endHours":25.96933932262463,"planetary_lord":"Sun"},{"name":"Hora 22","start":"01:58","end":"02:58","startHours":25.96933932262463,"endHours":26.96933932262463,"planetary_lord":"Mars"},{"name":"Hora 23","start":"02:58","end":"03:58","startHours":26.96933932262463,"endHours":27.96933932262463,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"03:58","end":"04:58","startHours":27.96933932262463,"endHours":28.96933932262463,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"West","rahuVasa":"North","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":18.067504517602455,"eotMinutes":3.7375796796685163,"ayanamsa":23.5926}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Navamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"sita-navami","name":"Sītā Navamī","name_sanskrit":"सीता नवमी","tradition":"Vaishnava","associated_deity":"Sītā Devī (Lakṣmī as Bhū-suta)","significance":"Devī Sītā's manifestation in Mithilā; rāmāvatāra-kalatra.","vrata":true,"detection":{"tithi_number":9,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":2,"sources":["Vālmīki Rāmāyaṇa, Bāla-Kāṇḍa 66"]},{"id":"madhva-jayanti","name":"Madhvācārya Jayantī","name_sanskrit":"मध्वाचार्य जयन्ती","tradition":"Vaishnava","associated_deity":"Madhvācārya (Dvaita)","significance":"Birth of Madhvācārya; Dvaita-pratiṣṭhāpaka. Vaiśākha Śukla 9.","vrata":false,"detection":{"tithi_number":9,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":4}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","url":"/day/-1626101-04-03","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"howrah"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga May 12, 1981 CE · Howrah, West Bengal · Vidhyamitra","description":"May 12, 1981 CE for Howrah, West Bengal: Śukla Navamī, sūryodaya 04:58, sūryāsta 18:08.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/howrah/1981-05-12","hreflang_alternates":{"en":"https://vidhyamitra.com/city/howrah/1981-05-12","sa":"https://sa.vidhyamitra.com/city/howrah/1981-05-12","hi":"https://hi.vidhyamitra.com/city/howrah/1981-05-12","x-default":"https://vidhyamitra.com/city/howrah/1981-05-12"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T00:30:41.871Z","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":"2026-05-31T00:30:41.871Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T00:30:41.871Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}