{"id":"vidhyamitra:city-day:howrah:1981-12-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/howrah/1981-12-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-12-18","date_display":"December 18, 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":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444956.770833,"kali_year":5083,"ahargana":1856491.2708,"sun":{"sidereal_longitude":242.116,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":146.949,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":264.833,"elapsed_within_tithi_degrees":0.833},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1,"moon_longitude":146.949,"elapsed_within_degrees":0.2823},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":29.065},"karana":{"half_tithi_index":44,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":12,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444956.770833,"ahargana":1856491.2708,"kali_year":5083,"ayanamsa_lahiri":23.601,"grahas":{"sun":{"sidereal_longitude":242.43062899999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":150.15702899999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false,"latitude":3.5826},"mars":{"sidereal_longitude":157.56522900000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":246.85462899999993,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":190.67512899999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"venus":{"sidereal_longitude":282.054529,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":true},"saturn":{"sidereal_longitude":176.67602899999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":94.1584,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":274.1584,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"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":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444956.770833,"kali_year":5083,"ahargana":1856491.2708,"sun":{"sidereal_longitude":242.116,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":146.949,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":264.833,"elapsed_within_tithi_degrees":0.833},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1,"moon_longitude":146.949,"elapsed_within_degrees":0.2823},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":29.065},"karana":{"half_tithi_index":44,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.583,"elongation":95.167},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.583,"opposition_distance":84.833}},"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":"06:12","sunsetLocal":"16:57","solarNoonLocal":"11:34","dayLengthHours":10.75119721577871,"dayLengthDisplay":"10 Hours 45 Mins 04 Secs","nightLengthDisplay":"13 Hours 14 Mins 56 Secs","moonriseLocal":"23:18","moonsetLocal":"11:32","rahuKala":{"name":"Rāhu Kāla","start":"10:14","end":"11:34","startHours":10.225398225558639,"endHours":11.569297877530978,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:15","end":"15:36","startHours":14.257097181475654,"endHours":15.600996833447994,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:32","end":"08:53","startHours":7.537598921613961,"endHours":8.881498573586299,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:42","end":"09:04","startHours":8.70231195332332,"endHours":9.060685193849277,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:38","end":"06:56","startHours":6.641665820299068,"endHours":6.928364412719834,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:13","end":"11:56","startHours":11.210924637005022,"endHours":11.927671118056935,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:46","end":"05:29","startHours":4.7602063075377945,"endHours":5.476952788589708,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:18","end":"06:12","startHours":5.29776616832673,"endHours":6.193699269641622,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:22","end":"14:05","startHours":13.361164080160762,"endHours":14.077910561212676,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"16:45","end":"17:09","startHours":16.744896485420334,"endHours":17.144896485420333,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"16:57","end":"17:24","startHours":16.944896485420333,"endHours":17.39286303607778,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:42","end":"18:27","startHours":16.694896485420333,"endHours":18.444896485420333,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:13","end":"23:56","startHours":23.21092463700502,"endHours":23.927671118056935,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:12","end":"07:32","startHours":6.193699269641622,"endHours":7.537598921613961,"quality":"neutral"},{"name":"Labha","start":"07:32","end":"08:53","startHours":7.537598921613961,"endHours":8.881498573586299,"quality":"auspicious"},{"name":"Amṛta","start":"08:53","end":"10:14","startHours":8.881498573586299,"endHours":10.225398225558639,"quality":"auspicious"},{"name":"Kāla","start":"10:14","end":"11:34","startHours":10.225398225558639,"endHours":11.569297877530978,"quality":"inauspicious"},{"name":"Śubha","start":"11:34","end":"12:55","startHours":11.569297877530978,"endHours":12.913197529503316,"quality":"auspicious"},{"name":"Roga","start":"12:55","end":"14:15","startHours":12.913197529503316,"endHours":14.257097181475654,"quality":"inauspicious"},{"name":"Udveg","start":"14:15","end":"15:36","startHours":14.257097181475654,"endHours":15.600996833447994,"quality":"inauspicious"},{"name":"Chala","start":"15:36","end":"16:57","startHours":15.600996833447994,"endHours":16.944896485420333,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"16:57","end":"18:36","startHours":16.944896485420333,"endHours":18.600996833447994,"quality":"inauspicious"},{"name":"Udveg","start":"18:36","end":"20:15","startHours":18.600996833447994,"endHours":20.257097181475658,"quality":"inauspicious"},{"name":"Chala","start":"20:15","end":"21:55","startHours":20.257097181475658,"endHours":21.913197529503318,"quality":"neutral"},{"name":"Labha","start":"21:55","end":"23:34","startHours":21.913197529503318,"endHours":23.56929787753098,"quality":"auspicious"},{"name":"Amṛta","start":"23:34","end":"01:14","startHours":23.56929787753098,"endHours":25.22539822555864,"quality":"auspicious"},{"name":"Kāla","start":"01:14","end":"02:53","startHours":25.22539822555864,"endHours":26.8814985735863,"quality":"inauspicious"},{"name":"Śubha","start":"02:53","end":"04:32","startHours":26.8814985735863,"endHours":28.537598921613963,"quality":"auspicious"},{"name":"Roga","start":"04:32","end":"06:12","startHours":28.537598921613963,"endHours":30.193699269641623,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:12","end":"07:12","startHours":6.193699269641622,"endHours":7.193699269641622,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:12","end":"08:12","startHours":7.193699269641622,"endHours":8.193699269641623,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:12","end":"09:12","startHours":8.193699269641623,"endHours":9.193699269641623,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:12","end":"10:12","startHours":9.193699269641623,"endHours":10.193699269641623,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:12","end":"11:12","startHours":10.193699269641623,"endHours":11.193699269641623,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:12","end":"12:12","startHours":11.193699269641623,"endHours":12.193699269641623,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:12","end":"13:12","startHours":12.193699269641623,"endHours":13.193699269641623,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:12","end":"14:12","startHours":13.193699269641623,"endHours":14.193699269641623,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:12","end":"15:12","startHours":14.193699269641623,"endHours":15.193699269641623,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:12","end":"16:12","startHours":15.193699269641623,"endHours":16.193699269641623,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:12","end":"17:12","startHours":16.193699269641623,"endHours":17.193699269641623,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:12","end":"18:12","startHours":17.193699269641623,"endHours":18.193699269641623,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:12","end":"19:12","startHours":18.193699269641623,"endHours":19.193699269641623,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:12","end":"20:12","startHours":19.193699269641623,"endHours":20.193699269641623,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:12","end":"21:12","startHours":20.193699269641623,"endHours":21.193699269641623,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:12","end":"22:12","startHours":21.193699269641623,"endHours":22.193699269641623,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:12","end":"23:12","startHours":22.193699269641623,"endHours":23.193699269641623,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:12","end":"00:12","startHours":23.193699269641623,"endHours":24.193699269641623,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:12","end":"01:12","startHours":24.193699269641623,"endHours":25.193699269641623,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:12","end":"02:12","startHours":25.193699269641623,"endHours":26.193699269641623,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:12","end":"03:12","startHours":26.193699269641623,"endHours":27.193699269641623,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:12","end":"04:12","startHours":27.193699269641623,"endHours":28.193699269641623,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:12","end":"05:12","startHours":28.193699269641623,"endHours":29.193699269641623,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:12","end":"06:12","startHours":29.193699269641623,"endHours":30.193699269641623,"planetary_lord":"Mars"}],"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":"South-East","anandadiYoga":{"name":"Prajāpati","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.37696328812608,"eotMinutes":2.787727348141232,"ayanamsa":23.601}},"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","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Kṛṣṇa Aṣṭamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Kṛṣṇa Aṣṭamī","url":"/day/-3226-07-09","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 December 18, 1981 CE · Howrah, West Bengal · Vidhyamitra","description":"December 18, 1981 CE for Howrah, West Bengal: Kṛṣṇa Aṣṭamī, sūryodaya 06:12, sūryāsta 16:57.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/howrah/1981-12-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/howrah/1981-12-18","sa":"https://sa.vidhyamitra.com/city/howrah/1981-12-18","hi":"https://hi.vidhyamitra.com/city/howrah/1981-12-18","x-default":"https://vidhyamitra.com/city/howrah/1981-12-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-30T23:52:14.664Z","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":"2026-05-30T23:52:14.664Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-30T23:52:14.664Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}