{"id":"vidhyamitra:city-day:howrah:1981-01-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/howrah/1981-01-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-01-04","date_display":"January 4, 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":1,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444608.770833,"kali_year":5082,"ahargana":1856143.2708,"sun":{"sidereal_longitude":259.853,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":232.1799,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":332.3269,"elapsed_within_tithi_degrees":8.3269},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2,"moon_longitude":232.1799,"elapsed_within_degrees":5.5132},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":132.0329},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"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":1,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444608.770833,"ahargana":1856143.2708,"kali_year":5082,"ayanamsa_lahiri":23.5877,"grahas":{"sun":{"sidereal_longitude":260.01232500000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":233.53432500000008,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false,"latitude":3.9124},"mars":{"sidereal_longitude":279.95662500000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":262.485625,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":166.17022500000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"venus":{"sidereal_longitude":237.62602500000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":165.76222499999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":112.5971,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":292.5971,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444608.770833,"kali_year":5082,"ahargana":1856143.2708,"sun":{"sidereal_longitude":259.853,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":232.1799,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":332.3269,"elapsed_within_tithi_degrees":8.3269},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2,"moon_longitude":232.1799,"elapsed_within_degrees":5.5132},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":132.0329},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.912,"elongation":27.673},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.912,"opposition_distance":152.327}},"eclipse_window_40days":[{"offset_days":16,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776}]},"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":"06:18","sunsetLocal":"17:06","solarNoonLocal":"11:42","dayLengthHours":10.792743037168416,"dayLengthDisplay":"10 Hours 47 Mins 34 Secs","nightLengthDisplay":"13 Hours 12 Mins 26 Secs","moonriseLocal":"04:34","moonsetLocal":"15:19","rahuKala":{"name":"Rāhu Kāla","start":"15:45","end":"17:06","startHours":15.746770420027259,"endHours":17.09586329967331,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:42","end":"13:03","startHours":11.699491781089105,"endHours":13.048584660735155,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:24","end":"15:45","startHours":14.397677540381208,"endHours":15.746770420027259,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:49","end":"09:11","startHours":8.821426971177527,"endHours":9.181185072416474,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:45","end":"07:02","startHours":6.7528178890535795,"endHours":7.040624370044737,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:20","end":"12:04","startHours":11.339733679850156,"endHours":12.05924988232805,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:52","end":"05:35","startHours":4.864087857549107,"endHours":5.583604060027001,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:24","end":"06:18","startHours":5.403725009407528,"endHours":6.303120262504896,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:30","end":"14:13","startHours":13.498282287283839,"endHours":14.217798489761734,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"16:54","end":"17:18","startHours":16.895863299673312,"endHours":17.29586329967331,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:06","end":"17:33","startHours":17.09586329967331,"endHours":17.545560926221995,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:51","end":"18:36","startHours":16.84586329967331,"endHours":18.59586329967331,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:20","end":"00:04","startHours":23.339733679850156,"endHours":24.059249882328047,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:18","end":"07:39","startHours":6.303120262504896,"endHours":7.652213142150948,"quality":"inauspicious"},{"name":"Chala","start":"07:39","end":"09:00","startHours":7.652213142150948,"endHours":9.001306021797,"quality":"neutral"},{"name":"Labha","start":"09:00","end":"10:21","startHours":9.001306021797,"endHours":10.350398901443052,"quality":"auspicious"},{"name":"Amṛta","start":"10:21","end":"11:42","startHours":10.350398901443052,"endHours":11.699491781089105,"quality":"auspicious"},{"name":"Kāla","start":"11:42","end":"13:03","startHours":11.699491781089105,"endHours":13.048584660735155,"quality":"inauspicious"},{"name":"Śubha","start":"13:03","end":"14:24","startHours":13.048584660735155,"endHours":14.397677540381208,"quality":"auspicious"},{"name":"Roga","start":"14:24","end":"15:45","startHours":14.397677540381208,"endHours":15.746770420027259,"quality":"inauspicious"},{"name":"Udveg","start":"15:45","end":"17:06","startHours":15.746770420027259,"endHours":17.09586329967331,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:06","end":"18:45","startHours":17.09586329967331,"endHours":18.74677042002726,"quality":"auspicious"},{"name":"Roga","start":"18:45","end":"20:24","startHours":18.74677042002726,"endHours":20.397677540381206,"quality":"inauspicious"},{"name":"Udveg","start":"20:24","end":"22:03","startHours":20.397677540381206,"endHours":22.048584660735155,"quality":"inauspicious"},{"name":"Chala","start":"22:03","end":"23:42","startHours":22.048584660735155,"endHours":23.699491781089105,"quality":"neutral"},{"name":"Labha","start":"23:42","end":"01:21","startHours":23.699491781089105,"endHours":25.35039890144305,"quality":"auspicious"},{"name":"Amṛta","start":"01:21","end":"03:00","startHours":25.35039890144305,"endHours":27.001306021797,"quality":"auspicious"},{"name":"Kāla","start":"03:00","end":"04:39","startHours":27.001306021797,"endHours":28.65221314215095,"quality":"inauspicious"},{"name":"Śubha","start":"04:39","end":"06:18","startHours":28.65221314215095,"endHours":30.303120262504898,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:18","end":"07:18","startHours":6.303120262504896,"endHours":7.303120262504896,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:18","end":"08:18","startHours":7.303120262504896,"endHours":8.303120262504896,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:18","end":"09:18","startHours":8.303120262504896,"endHours":9.303120262504896,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:18","end":"10:18","startHours":9.303120262504896,"endHours":10.303120262504896,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:18","end":"11:18","startHours":10.303120262504896,"endHours":11.303120262504896,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:18","end":"12:18","startHours":11.303120262504896,"endHours":12.303120262504896,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:18","end":"13:18","startHours":12.303120262504896,"endHours":13.303120262504896,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:18","end":"14:18","startHours":13.303120262504896,"endHours":14.303120262504896,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:18","end":"15:18","startHours":14.303120262504896,"endHours":15.303120262504896,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:18","end":"16:18","startHours":15.303120262504896,"endHours":16.303120262504898,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:18","end":"17:18","startHours":16.303120262504898,"endHours":17.303120262504898,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:18","end":"18:18","startHours":17.303120262504898,"endHours":18.303120262504898,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:18","end":"19:18","startHours":18.303120262504898,"endHours":19.303120262504898,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:18","end":"20:18","startHours":19.303120262504898,"endHours":20.303120262504898,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:18","end":"21:18","startHours":20.303120262504898,"endHours":21.303120262504898,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:18","end":"22:18","startHours":21.303120262504898,"endHours":22.303120262504898,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:18","end":"23:18","startHours":22.303120262504898,"endHours":23.303120262504898,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:18","end":"00:18","startHours":23.303120262504898,"endHours":24.303120262504898,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:18","end":"01:18","startHours":24.303120262504898,"endHours":25.303120262504898,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:18","end":"02:18","startHours":25.303120262504898,"endHours":26.303120262504898,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:18","end":"03:18","startHours":26.303120262504898,"endHours":27.303120262504898,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:18","end":"04:18","startHours":27.303120262504898,"endHours":28.303120262504898,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:18","end":"05:18","startHours":28.303120262504898,"endHours":29.303120262504898,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:18","end":"06:18","startHours":29.303120262504898,"endHours":30.303120262504898,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"North-East","rahuVasa":"North-East","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-22.74188853337645,"eotMinutes":-5.02390686534617,"ayanamsa":23.5877}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Kṛṣṇa Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Kṛṣṇa Trayodaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5},{"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":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Jyeṣṭhā","url":"/day/-3137-10-20","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 January 4, 1981 CE · Howrah, West Bengal · Vidhyamitra","description":"January 4, 1981 CE for Howrah, West Bengal: Kṛṣṇa Trayodaśī, sūryodaya 06:18, sūryāsta 17:06.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/howrah/1981-01-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/howrah/1981-01-04","sa":"https://sa.vidhyamitra.com/city/howrah/1981-01-04","hi":"https://hi.vidhyamitra.com/city/howrah/1981-01-04","x-default":"https://vidhyamitra.com/city/howrah/1981-01-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T01:10:39.702Z","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":"2026-05-18T01:10:39.702Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T01:10:39.702Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}