{"id":"vidhyamitra:city-day:varanasi:1981-12-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/varanasi/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":"varanasi","name":"Vārāṇasī (Kāśī)","lat":25.3176,"lon":82.9739,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"varanasi","name":"Vārāṇasī (Kāśī)","lat":25.3176,"lon":82.9739,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"06:38","sunsetLocal":"17:12","solarNoonLocal":"11:55","dayLengthHours":10.563195304895146,"dayLengthDisplay":"10 Hours 33 Mins 48 Secs","nightLengthDisplay":"13 Hours 26 Mins 12 Secs","moonriseLocal":"23:39","moonsetLocal":"11:53","rahuKala":{"name":"Rāhu Kāla","start":"10:36","end":"11:55","startHours":10.601545131085754,"endHours":11.921944544197647,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:34","end":"15:53","startHours":14.562743370421433,"endHours":15.883142783533327,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:58","end":"09:17","startHours":7.960746304861967,"endHours":9.28114571797386,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:06","end":"09:27","startHours":9.105092462892275,"endHours":9.457198973055446,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:05","end":"07:22","startHours":7.080480029454038,"endHours":7.362165237584575,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:34","end":"12:16","startHours":11.569838034034476,"endHours":12.274051054360818,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:14","end":"05:56","startHours":5.231920851097388,"endHours":5.936133871423731,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:46","end":"06:38","startHours":5.760080616342145,"endHours":6.640346891750074,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:41","end":"14:23","startHours":13.682477095013503,"endHours":14.386690115339846,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:00","end":"17:24","startHours":17.00354219664522,"endHours":17.40354219664522,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:12","end":"17:39","startHours":17.20354219664522,"endHours":17.643675334349183,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:57","end":"18:42","startHours":16.95354219664522,"endHours":18.70354219664522,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:34","end":"00:16","startHours":23.569838034034476,"endHours":24.274051054360818,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:38","end":"07:58","startHours":6.640346891750074,"endHours":7.960746304861967,"quality":"neutral"},{"name":"Labha","start":"07:58","end":"09:17","startHours":7.960746304861967,"endHours":9.28114571797386,"quality":"auspicious"},{"name":"Amṛta","start":"09:17","end":"10:36","startHours":9.28114571797386,"endHours":10.601545131085754,"quality":"auspicious"},{"name":"Kāla","start":"10:36","end":"11:55","startHours":10.601545131085754,"endHours":11.921944544197647,"quality":"inauspicious"},{"name":"Śubha","start":"11:55","end":"13:15","startHours":11.921944544197647,"endHours":13.24234395730954,"quality":"auspicious"},{"name":"Roga","start":"13:15","end":"14:34","startHours":13.24234395730954,"endHours":14.562743370421433,"quality":"inauspicious"},{"name":"Udveg","start":"14:34","end":"15:53","startHours":14.562743370421433,"endHours":15.883142783533327,"quality":"inauspicious"},{"name":"Chala","start":"15:53","end":"17:12","startHours":15.883142783533327,"endHours":17.20354219664522,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:12","end":"18:53","startHours":17.20354219664522,"endHours":18.883142783533327,"quality":"inauspicious"},{"name":"Udveg","start":"18:53","end":"20:34","startHours":18.883142783533327,"endHours":20.562743370421433,"quality":"inauspicious"},{"name":"Chala","start":"20:34","end":"22:15","startHours":20.562743370421433,"endHours":22.24234395730954,"quality":"neutral"},{"name":"Labha","start":"22:15","end":"23:55","startHours":22.24234395730954,"endHours":23.921944544197647,"quality":"auspicious"},{"name":"Amṛta","start":"23:55","end":"01:36","startHours":23.921944544197647,"endHours":25.601545131085754,"quality":"auspicious"},{"name":"Kāla","start":"01:36","end":"03:17","startHours":25.601545131085754,"endHours":27.28114571797386,"quality":"inauspicious"},{"name":"Śubha","start":"03:17","end":"04:58","startHours":27.28114571797386,"endHours":28.960746304861967,"quality":"auspicious"},{"name":"Roga","start":"04:58","end":"06:38","startHours":28.960746304861967,"endHours":30.640346891750074,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:38","end":"07:38","startHours":6.640346891750074,"endHours":7.640346891750074,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:38","end":"08:38","startHours":7.640346891750074,"endHours":8.640346891750074,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:38","end":"09:38","startHours":8.640346891750074,"endHours":9.640346891750074,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:38","end":"10:38","startHours":9.640346891750074,"endHours":10.640346891750074,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:38","end":"11:38","startHours":10.640346891750074,"endHours":11.640346891750074,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:38","end":"12:38","startHours":11.640346891750074,"endHours":12.640346891750074,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:38","end":"13:38","startHours":12.640346891750074,"endHours":13.640346891750074,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:38","end":"14:38","startHours":13.640346891750074,"endHours":14.640346891750074,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:38","end":"15:38","startHours":14.640346891750074,"endHours":15.640346891750074,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:38","end":"16:38","startHours":15.640346891750074,"endHours":16.640346891750074,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:38","end":"17:38","startHours":16.640346891750074,"endHours":17.640346891750074,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:38","end":"18:38","startHours":17.640346891750074,"endHours":18.640346891750074,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:38","end":"19:38","startHours":18.640346891750074,"endHours":19.640346891750074,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:38","end":"20:38","startHours":19.640346891750074,"endHours":20.640346891750074,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:38","end":"21:38","startHours":20.640346891750074,"endHours":21.640346891750074,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:38","end":"22:38","startHours":21.640346891750074,"endHours":22.640346891750074,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:38","end":"23:38","startHours":22.640346891750074,"endHours":23.640346891750074,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:38","end":"00:38","startHours":23.640346891750074,"endHours":24.640346891750074,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:38","end":"01:38","startHours":24.640346891750074,"endHours":25.640346891750074,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:38","end":"02:38","startHours":25.640346891750074,"endHours":26.640346891750074,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:38","end":"03:38","startHours":26.640346891750074,"endHours":27.640346891750074,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:38","end":"04:38","startHours":27.640346891750074,"endHours":28.640346891750074,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:38","end":"05:38","startHours":28.640346891750074,"endHours":29.640346891750074,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:38","end":"06:38","startHours":29.640346891750074,"endHours":30.640346891750074,"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"},"drikRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","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","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Kṛṣṇa Aṣṭamī · 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}],"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":"varanasi"},"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 · Vārāṇasī (Kāśī) · Vidhyamitra","description":"December 18, 1981 CE for Vārāṇasī (Kāśī): Kṛṣṇa Aṣṭamī, sūryodaya 06:38, sūryāsta 17:12.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/varanasi/1981-12-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/varanasi/1981-12-18","sa":"https://sa.vidhyamitra.com/city/varanasi/1981-12-18","hi":"https://hi.vidhyamitra.com/city/varanasi/1981-12-18","x-default":"https://vidhyamitra.com/city/varanasi/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":"2026-05-14T15:39:49.741Z","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":"2026-05-14T15:39:49.741Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T15:39:49.741Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}