{"id":"vidhyamitra:city-day:howrah:1981-08-12:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/howrah/1981-08-12","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-08-12","date_display":"August 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":8,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444828.770833,"kali_year":5083,"ahargana":1856363.2708,"sun":{"sidereal_longitude":115.1051,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":251.2134,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.1084,"elapsed_within_tithi_degrees":4.1084},"nakshatra":{"number":19,"name":"Mūla","pada":4,"moon_longitude":251.2134,"elapsed_within_degrees":11.2134},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":6.3185},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":8,"day":12,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444828.770833,"ahargana":1856363.2708,"kali_year":5083,"ayanamsa_lahiri":23.5961,"grahas":{"sun":{"sidereal_longitude":115.65931999999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":252.31111999999996,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false,"latitude":2.2297},"mars":{"sidereal_longitude":83.07162,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":117.84042,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":164.64782000000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"venus":{"sidereal_longitude":148.86442,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":162.66832,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":100.9405,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":280.9405,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"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":8,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444828.770833,"kali_year":5083,"ahargana":1856363.2708,"sun":{"sidereal_longitude":115.1051,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":251.2134,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.1084,"elapsed_within_tithi_degrees":4.1084},"nakshatra":{"number":19,"name":"Mūla","pada":4,"moon_longitude":251.2134,"elapsed_within_degrees":11.2134},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":6.3185},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.23,"elongation":136.108},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.23,"opposition_distance":43.892}},"eclipse_window_40days":[{"offset_days":-12,"type":"solar","occurs":true,"moon_latitude":0.181,"elongation":0.207}]},"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":"05:12","sunsetLocal":"18:11","solarNoonLocal":"11:42","dayLengthHours":12.981907836123838,"dayLengthDisplay":"12 Hours 58 Mins 55 Secs","nightLengthDisplay":"11 Hours 01 Mins 05 Secs","moonriseLocal":"15:27","moonsetLocal":"02:10","rahuKala":{"name":"Rāhu Kāla","start":"11:42","end":"13:19","startHours":11.694746680597387,"endHours":13.317485160112867,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:50","end":"08:27","startHours":6.826531242050947,"endHours":8.449269721566427,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:04","end":"11:42","startHours":10.072008201081907,"endHours":11.694746680597387,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:14","end":"08:40","startHours":8.232904590964363,"endHours":8.665634852168491,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:45","end":"06:05","startHours":5.744705589040628,"endHours":6.09088979800393,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:16","end":"12:08","startHours":11.262016419393259,"endHours":12.127476941801515,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:28","end":"04:20","startHours":3.472871717718956,"endHours":4.338332240127212,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:07","end":"05:12","startHours":4.121967109525148,"endHours":5.203792762535468,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:52","end":"14:43","startHours":13.858397986618026,"endHours":14.723858509026282,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:59","end":"18:23","startHours":17.985700598659307,"endHours":18.385700598659305,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:11","end":"18:44","startHours":18.185700598659306,"endHours":18.726613425164466,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:56","end":"19:41","startHours":17.935700598659306,"endHours":19.685700598659306,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:16","end":"00:08","startHours":23.26201641939326,"endHours":24.127476941801515,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:12","end":"06:50","startHours":5.203792762535468,"endHours":6.826531242050947,"quality":"auspicious"},{"name":"Amṛta","start":"06:50","end":"08:27","startHours":6.826531242050947,"endHours":8.449269721566427,"quality":"auspicious"},{"name":"Kāla","start":"08:27","end":"10:04","startHours":8.449269721566427,"endHours":10.072008201081907,"quality":"inauspicious"},{"name":"Śubha","start":"10:04","end":"11:42","startHours":10.072008201081907,"endHours":11.694746680597387,"quality":"auspicious"},{"name":"Roga","start":"11:42","end":"13:19","startHours":11.694746680597387,"endHours":13.317485160112867,"quality":"inauspicious"},{"name":"Udveg","start":"13:19","end":"14:56","startHours":13.317485160112867,"endHours":14.940223639628346,"quality":"inauspicious"},{"name":"Chala","start":"14:56","end":"16:34","startHours":14.940223639628346,"endHours":16.562962119143826,"quality":"neutral"},{"name":"Labha","start":"16:34","end":"18:11","startHours":16.562962119143826,"endHours":18.185700598659306,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:11","end":"19:34","startHours":18.185700598659306,"endHours":19.562962119143826,"quality":"inauspicious"},{"name":"Chala","start":"19:34","end":"20:56","startHours":19.562962119143826,"endHours":20.940223639628346,"quality":"neutral"},{"name":"Labha","start":"20:56","end":"22:19","startHours":20.940223639628346,"endHours":22.317485160112867,"quality":"auspicious"},{"name":"Amṛta","start":"22:19","end":"23:42","startHours":22.317485160112867,"endHours":23.694746680597387,"quality":"auspicious"},{"name":"Kāla","start":"23:42","end":"01:04","startHours":23.694746680597387,"endHours":25.072008201081907,"quality":"inauspicious"},{"name":"Śubha","start":"01:04","end":"02:27","startHours":25.072008201081907,"endHours":26.449269721566427,"quality":"auspicious"},{"name":"Roga","start":"02:27","end":"03:50","startHours":26.449269721566427,"endHours":27.826531242050947,"quality":"inauspicious"},{"name":"Udveg","start":"03:50","end":"05:12","startHours":27.826531242050947,"endHours":29.203792762535468,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:12","end":"06:12","startHours":5.203792762535468,"endHours":6.203792762535468,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:12","end":"07:12","startHours":6.203792762535468,"endHours":7.203792762535468,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:12","end":"08:12","startHours":7.203792762535468,"endHours":8.203792762535468,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:12","end":"09:12","startHours":8.203792762535468,"endHours":9.203792762535468,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:12","end":"10:12","startHours":9.203792762535468,"endHours":10.203792762535468,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:12","end":"11:12","startHours":10.203792762535468,"endHours":11.203792762535468,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:12","end":"12:12","startHours":11.203792762535468,"endHours":12.203792762535468,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:12","end":"13:12","startHours":12.203792762535468,"endHours":13.203792762535468,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:12","end":"14:12","startHours":13.203792762535468,"endHours":14.203792762535468,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:12","end":"15:12","startHours":14.203792762535468,"endHours":15.203792762535468,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:12","end":"16:12","startHours":15.203792762535468,"endHours":16.203792762535468,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:12","end":"17:12","startHours":16.203792762535468,"endHours":17.203792762535468,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:12","end":"18:12","startHours":17.203792762535468,"endHours":18.203792762535468,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:12","end":"19:12","startHours":18.203792762535468,"endHours":19.203792762535468,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:12","end":"20:12","startHours":19.203792762535468,"endHours":20.203792762535468,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:12","end":"21:12","startHours":20.203792762535468,"endHours":21.203792762535468,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:12","end":"22:12","startHours":21.203792762535468,"endHours":22.203792762535468,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:12","end":"23:12","startHours":22.203792762535468,"endHours":23.203792762535468,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:12","end":"00:12","startHours":23.203792762535468,"endHours":24.203792762535468,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:12","end":"01:12","startHours":24.203792762535468,"endHours":25.203792762535468,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:12","end":"02:12","startHours":25.203792762535468,"endHours":26.203792762535468,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:12","end":"03:12","startHours":26.203792762535468,"endHours":27.203792762535468,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:12","end":"04:12","startHours":27.203792762535468,"endHours":28.203792762535468,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:12","end":"05:12","startHours":28.203792762535468,"endHours":29.203792762535468,"planetary_lord":"Sun"}],"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","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"East","rahuVasa":"South-West","anandadiYoga":{"name":"Dhūmra","quality":"Inauspicious"},"drikRitu":"Varṣā (Monsoon) (Drik)","vedicRitu":"Grīṣma (Summer)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":15.046046417837566,"eotMinutes":-4.739200835843176,"ayanamsa":23.5961}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Dvādaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"karka-sankranti","name":"Karka Saṅkrānti (Dakṣiṇāyana)","name_sanskrit":"कर्क सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Cancer; Dakṣiṇāyana (south-going) begins. Devatā-rātri begins.","vrata":true,"detection":{"sun_rashi":"Karka"},"precedence":2}],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — its presiding graha's walk."},"cosmic_resonances":[]},"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 August 12, 1981 CE · Howrah, West Bengal · Vidhyamitra","description":"August 12, 1981 CE for Howrah, West Bengal: Śukla Dvādaśī, sūryodaya 05:12, sūryāsta 18:11.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/howrah/1981-08-12","hreflang_alternates":{"en":"https://vidhyamitra.com/city/howrah/1981-08-12","sa":"https://sa.vidhyamitra.com/city/howrah/1981-08-12","hi":"https://hi.vidhyamitra.com/city/howrah/1981-08-12","x-default":"https://vidhyamitra.com/city/howrah/1981-08-12"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T03:09:58.201Z","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":"2026-05-19T03:09:58.201Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T03:09:58.201Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}