{"id":"vidhyamitra:city-day:howrah:1981-08-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/howrah/1981-08-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-08-17","date_display":"August 17, 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":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444833.770833,"kali_year":5083,"ahargana":1856368.2708,"sun":{"sidereal_longitude":119.8828,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":316.0319,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":196.149,"elapsed_within_tithi_degrees":4.149},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3,"moon_longitude":316.0319,"elapsed_within_degrees":9.3652},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":75.9147},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444833.770833,"ahargana":1856368.2708,"kali_year":5083,"ayanamsa_lahiri":23.5963,"grahas":{"sun":{"sidereal_longitude":120.46202900000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":317.306729,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"retrograde":false,"latitude":-2.6022},"mars":{"sidereal_longitude":86.335329,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":127.63112899999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":165.54132900000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"venus":{"sidereal_longitude":154.83872900000006,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":163.15772900000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":100.6755,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":280.6755,"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":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444833.770833,"kali_year":5083,"ahargana":1856368.2708,"sun":{"sidereal_longitude":119.8828,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":316.0319,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":196.149,"elapsed_within_tithi_degrees":4.149},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3,"moon_longitude":316.0319,"elapsed_within_degrees":9.3652},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":75.9147},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.602,"elongation":163.851},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.602,"opposition_distance":16.149}},"eclipse_window_40days":[{"offset_days":-17,"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":"05:14","sunsetLocal":"18:07","solarNoonLocal":"11:41","dayLengthHours":12.8890397509456,"dayLengthDisplay":"12 Hours 53 Mins 21 Secs","nightLengthDisplay":"11 Hours 06 Mins 39 Secs","moonriseLocal":"18:58","moonsetLocal":"06:38","rahuKala":{"name":"Rāhu Kāla","start":"06:51","end":"08:27","startHours":6.844929785964033,"endHours":8.456059754832232,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:04","end":"11:41","startHours":10.067189723700434,"endHours":11.678319692568632,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:17","end":"14:54","startHours":13.289449661436834,"endHours":14.900579630305032,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:14","end":"08:40","startHours":8.241242425649807,"endHours":8.67087708401466,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:46","end":"06:07","startHours":5.7708431400519,"endHours":6.114550866743783,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:15","end":"12:06","startHours":11.24868503420378,"endHours":12.107954350933484,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:31","end":"04:22","startHours":3.5152611836364196,"endHours":4.374530500366126,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:10","end":"05:14","startHours":4.1597131711837,"endHours":5.233799817095833,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:50","end":"14:41","startHours":13.8264929843929,"endHours":14.685762301122606,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:55","end":"18:19","startHours":17.922839568041432,"endHours":18.32283956804143,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:07","end":"18:40","startHours":18.12283956804143,"endHours":18.659882890997498,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:52","end":"19:37","startHours":17.87283956804143,"endHours":19.62283956804143,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:15","end":"00:06","startHours":23.248685034203778,"endHours":24.107954350933486,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:14","end":"06:51","startHours":5.233799817095833,"endHours":6.844929785964033,"quality":"auspicious"},{"name":"Kāla","start":"06:51","end":"08:27","startHours":6.844929785964033,"endHours":8.456059754832232,"quality":"inauspicious"},{"name":"Śubha","start":"08:27","end":"10:04","startHours":8.456059754832232,"endHours":10.067189723700434,"quality":"auspicious"},{"name":"Roga","start":"10:04","end":"11:41","startHours":10.067189723700434,"endHours":11.678319692568632,"quality":"inauspicious"},{"name":"Udveg","start":"11:41","end":"13:17","startHours":11.678319692568632,"endHours":13.289449661436834,"quality":"inauspicious"},{"name":"Chala","start":"13:17","end":"14:54","startHours":13.289449661436834,"endHours":14.900579630305032,"quality":"neutral"},{"name":"Labha","start":"14:54","end":"16:31","startHours":14.900579630305032,"endHours":16.511709599173233,"quality":"auspicious"},{"name":"Amṛta","start":"16:31","end":"18:07","startHours":16.511709599173233,"endHours":18.12283956804143,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:07","end":"19:31","startHours":18.12283956804143,"endHours":19.51170959917323,"quality":"neutral"},{"name":"Labha","start":"19:31","end":"20:54","startHours":19.51170959917323,"endHours":20.90057963030503,"quality":"auspicious"},{"name":"Amṛta","start":"20:54","end":"22:17","startHours":20.90057963030503,"endHours":22.289449661436834,"quality":"auspicious"},{"name":"Kāla","start":"22:17","end":"23:41","startHours":22.289449661436834,"endHours":23.678319692568632,"quality":"inauspicious"},{"name":"Śubha","start":"23:41","end":"01:04","startHours":23.678319692568632,"endHours":25.06718972370043,"quality":"auspicious"},{"name":"Roga","start":"01:04","end":"02:27","startHours":25.06718972370043,"endHours":26.456059754832232,"quality":"inauspicious"},{"name":"Udveg","start":"02:27","end":"03:51","startHours":26.456059754832232,"endHours":27.844929785964034,"quality":"inauspicious"},{"name":"Chala","start":"03:51","end":"05:14","startHours":27.844929785964034,"endHours":29.233799817095832,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:14","end":"06:14","startHours":5.233799817095833,"endHours":6.233799817095833,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:14","end":"07:14","startHours":6.233799817095833,"endHours":7.233799817095833,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:14","end":"08:14","startHours":7.233799817095833,"endHours":8.233799817095832,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:14","end":"09:14","startHours":8.233799817095832,"endHours":9.233799817095832,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:14","end":"10:14","startHours":9.233799817095832,"endHours":10.233799817095832,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:14","end":"11:14","startHours":10.233799817095832,"endHours":11.233799817095832,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:14","end":"12:14","startHours":11.233799817095832,"endHours":12.233799817095832,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:14","end":"13:14","startHours":12.233799817095832,"endHours":13.233799817095832,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:14","end":"14:14","startHours":13.233799817095832,"endHours":14.233799817095832,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:14","end":"15:14","startHours":14.233799817095832,"endHours":15.233799817095832,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:14","end":"16:14","startHours":15.233799817095832,"endHours":16.233799817095832,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:14","end":"17:14","startHours":16.233799817095832,"endHours":17.233799817095832,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:14","end":"18:14","startHours":17.233799817095832,"endHours":18.233799817095832,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:14","end":"19:14","startHours":18.233799817095832,"endHours":19.233799817095832,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:14","end":"20:14","startHours":19.233799817095832,"endHours":20.233799817095832,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:14","end":"21:14","startHours":20.233799817095832,"endHours":21.233799817095832,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:14","end":"22:14","startHours":21.233799817095832,"endHours":22.233799817095832,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:14","end":"23:14","startHours":22.233799817095832,"endHours":23.233799817095832,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:14","end":"00:14","startHours":23.233799817095832,"endHours":24.233799817095832,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:14","end":"01:14","startHours":24.233799817095832,"endHours":25.233799817095832,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:14","end":"02:14","startHours":25.233799817095832,"endHours":26.233799817095832,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:14","end":"03:14","startHours":26.233799817095832,"endHours":27.233799817095832,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:14","end":"04:14","startHours":27.233799817095832,"endHours":28.233799817095832,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:14","end":"05:14","startHours":28.233799817095832,"endHours":29.233799817095832,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Dhātṛ","quality":"Auspicious"},"drikRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":13.500484072613567,"eotMinutes":-3.7535815541179196,"ayanamsa":23.5963}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Kṛṣṇa Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Kṛṣṇa Dvitīyā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi":"Siṃha"},"precedence":5}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — 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 17, 1981 CE · Howrah, West Bengal · Vidhyamitra","description":"August 17, 1981 CE for Howrah, West Bengal: Kṛṣṇa Dvitīyā, sūryodaya 05:14, sūryāsta 18:07.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/howrah/1981-08-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/howrah/1981-08-17","sa":"https://sa.vidhyamitra.com/city/howrah/1981-08-17","hi":"https://hi.vidhyamitra.com/city/howrah/1981-08-17","x-default":"https://vidhyamitra.com/city/howrah/1981-08-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T00:25:48.929Z","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":"2026-05-19T00:25:48.929Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T00:25:48.929Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}