{"id":"vidhyamitra:city-day:mathura:1980-01-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mathura/1980-01-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-01-01","date_display":"January 1, 1980 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":1980,"month":1,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444239.770833,"kali_year":5081,"ahargana":1855774.2708,"sun":{"sidereal_longitude":256.0066,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":61.1473,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":165.1408,"elapsed_within_tithi_degrees":9.1408},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":3,"moon_longitude":61.1473,"elapsed_within_degrees":7.814},"yoga":{"number":24,"name":"Śukla","sum_longitude":317.1539},"karana":{"half_tithi_index":27,"name":"Vaṇija"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1980,"month":1,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444239.770833,"ahargana":1855774.2708,"kali_year":5081,"ayanamsa_lahiri":23.5736,"grahas":{"sun":{"sidereal_longitude":256.196824,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":60.11202400000002,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false,"latitude":-4.2544},"mars":{"sidereal_longitude":140.69712400000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":244.71302400000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":136.39142400000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":true},"venus":{"sidereal_longitude":288.160624,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":153.22912399999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":132.1485,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":312.1485,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"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":1980,"month":1,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444239.770833,"kali_year":5081,"ahargana":1855774.2708,"sun":{"sidereal_longitude":256.0066,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":61.1473,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":165.1408,"elapsed_within_tithi_degrees":9.1408},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":3,"moon_longitude":61.1473,"elapsed_within_degrees":7.814},"yoga":{"number":24,"name":"Śukla","sum_longitude":317.1539},"karana":{"half_tithi_index":27,"name":"Vaṇija"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.254,"elongation":165.141},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.254,"opposition_distance":14.859}},"eclipse_window_40days":[]},"city":{"slug":"mathura","name":"Mathurā","lat":27.4924,"lon":77.6737,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"mathura","name":"Mathurā","lat":27.4924,"lon":77.6737,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"07:10","sunsetLocal":"17:36","solarNoonLocal":"12:23","dayLengthHours":10.431281265776933,"dayLengthDisplay":"10 Hours 25 Mins 53 Secs","nightLengthDisplay":"13 Hours 34 Mins 07 Secs","moonriseLocal":"16:24","moonsetLocal":"06:13","rahuKala":{"name":"Rāhu Kāla","start":"14:59","end":"16:18","startHours":14.991326621834169,"endHours":16.295236780056285,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:47","end":"11:05","startHours":9.775685988945702,"endHours":11.07959614716782,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:23","end":"13:41","startHours":12.383506305389936,"endHours":13.687416463612053,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:36","end":"09:57","startHours":9.601831301182752,"endHours":9.94954067670865,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:36","end":"07:53","startHours":7.602502391908841,"endHours":7.880669892329559,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:02","end":"12:44","startHours":12.035796929864036,"endHours":12.731215680915833,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:47","end":"06:28","startHours":5.777028170397878,"endHours":6.472446921449674,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:18","end":"07:10","startHours":6.298592233686724,"endHours":7.167865672501469,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:07","end":"14:49","startHours":14.122053183019425,"endHours":14.81747193407122,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:24","end":"17:48","startHours":17.399146938278403,"endHours":17.7991469382784,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:36","end":"18:02","startHours":17.599146938278402,"endHours":18.033783657685774,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:21","end":"19:06","startHours":17.349146938278402,"endHours":19.099146938278402,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:02","end":"00:44","startHours":24.035796929864038,"endHours":24.731215680915835,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"07:10","end":"08:28","startHours":7.167865672501469,"endHours":8.471775830723585,"quality":"inauspicious"},{"name":"Udveg","start":"08:28","end":"09:47","startHours":8.471775830723585,"endHours":9.775685988945702,"quality":"inauspicious"},{"name":"Chala","start":"09:47","end":"11:05","startHours":9.775685988945702,"endHours":11.07959614716782,"quality":"neutral"},{"name":"Labha","start":"11:05","end":"12:23","startHours":11.07959614716782,"endHours":12.383506305389936,"quality":"auspicious"},{"name":"Amṛta","start":"12:23","end":"13:41","startHours":12.383506305389936,"endHours":13.687416463612053,"quality":"auspicious"},{"name":"Kāla","start":"13:41","end":"14:59","startHours":13.687416463612053,"endHours":14.991326621834169,"quality":"inauspicious"},{"name":"Śubha","start":"14:59","end":"16:18","startHours":14.991326621834169,"endHours":16.295236780056285,"quality":"auspicious"},{"name":"Roga","start":"16:18","end":"17:36","startHours":16.295236780056285,"endHours":17.599146938278402,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:36","end":"19:18","startHours":17.599146938278402,"endHours":19.295236780056285,"quality":"inauspicious"},{"name":"Śubha","start":"19:18","end":"20:59","startHours":19.295236780056285,"endHours":20.99132662183417,"quality":"auspicious"},{"name":"Roga","start":"20:59","end":"22:41","startHours":20.99132662183417,"endHours":22.687416463612053,"quality":"inauspicious"},{"name":"Udveg","start":"22:41","end":"00:23","startHours":22.687416463612053,"endHours":24.383506305389936,"quality":"inauspicious"},{"name":"Chala","start":"00:23","end":"02:05","startHours":24.383506305389936,"endHours":26.07959614716782,"quality":"neutral"},{"name":"Labha","start":"02:05","end":"03:47","startHours":26.07959614716782,"endHours":27.775685988945703,"quality":"auspicious"},{"name":"Amṛta","start":"03:47","end":"05:28","startHours":27.775685988945703,"endHours":29.471775830723587,"quality":"auspicious"},{"name":"Kāla","start":"05:28","end":"07:10","startHours":29.471775830723587,"endHours":31.16786567250147,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:10","end":"08:10","startHours":7.167865672501469,"endHours":8.167865672501469,"planetary_lord":"Mars"},{"name":"Hora 2","start":"08:10","end":"09:10","startHours":8.167865672501469,"endHours":9.167865672501469,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"09:10","end":"10:10","startHours":9.167865672501469,"endHours":10.167865672501469,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"10:10","end":"11:10","startHours":10.167865672501469,"endHours":11.167865672501469,"planetary_lord":"Moon"},{"name":"Hora 5","start":"11:10","end":"12:10","startHours":11.167865672501469,"endHours":12.167865672501469,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"12:10","end":"13:10","startHours":12.167865672501469,"endHours":13.167865672501469,"planetary_lord":"Venus"},{"name":"Hora 7","start":"13:10","end":"14:10","startHours":13.167865672501469,"endHours":14.167865672501469,"planetary_lord":"Sun"},{"name":"Hora 8","start":"14:10","end":"15:10","startHours":14.167865672501469,"endHours":15.167865672501469,"planetary_lord":"Mars"},{"name":"Hora 9","start":"15:10","end":"16:10","startHours":15.167865672501469,"endHours":16.16786567250147,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"16:10","end":"17:10","startHours":16.16786567250147,"endHours":17.16786567250147,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"17:10","end":"18:10","startHours":17.16786567250147,"endHours":18.16786567250147,"planetary_lord":"Moon"},{"name":"Hora 12","start":"18:10","end":"19:10","startHours":18.16786567250147,"endHours":19.16786567250147,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"19:10","end":"20:10","startHours":19.16786567250147,"endHours":20.16786567250147,"planetary_lord":"Venus"},{"name":"Hora 14","start":"20:10","end":"21:10","startHours":20.16786567250147,"endHours":21.16786567250147,"planetary_lord":"Sun"},{"name":"Hora 15","start":"21:10","end":"22:10","startHours":21.16786567250147,"endHours":22.16786567250147,"planetary_lord":"Mars"},{"name":"Hora 16","start":"22:10","end":"23:10","startHours":22.16786567250147,"endHours":23.16786567250147,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"23:10","end":"00:10","startHours":23.16786567250147,"endHours":24.16786567250147,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"00:10","end":"01:10","startHours":24.16786567250147,"endHours":25.16786567250147,"planetary_lord":"Moon"},{"name":"Hora 19","start":"01:10","end":"02:10","startHours":25.16786567250147,"endHours":26.16786567250147,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"02:10","end":"03:10","startHours":26.16786567250147,"endHours":27.16786567250147,"planetary_lord":"Venus"},{"name":"Hora 21","start":"03:10","end":"04:10","startHours":27.16786567250147,"endHours":28.16786567250147,"planetary_lord":"Sun"},{"name":"Hora 22","start":"04:10","end":"05:10","startHours":28.16786567250147,"endHours":29.16786567250147,"planetary_lord":"Mars"},{"name":"Hora 23","start":"05:10","end":"06:10","startHours":29.16786567250147,"endHours":30.16786567250147,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"06:10","end":"07:10","startHours":30.16786567250147,"endHours":31.16786567250147,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South","rahuVasa":"North","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"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":-23.07673575109095,"eotMinutes":-3.705178323396069,"ayanamsa":23.5736}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Caturdaśī · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"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":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"mathura"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga January 1, 1980 CE · Mathurā · Vidhyamitra","description":"January 1, 1980 CE for Mathurā: Śukla Caturdaśī, sūryodaya 07:10, sūryāsta 17:36.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mathura/1980-01-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mathura/1980-01-01","sa":"https://sa.vidhyamitra.com/city/mathura/1980-01-01","hi":"https://hi.vidhyamitra.com/city/mathura/1980-01-01","x-default":"https://vidhyamitra.com/city/mathura/1980-01-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T13:43:25.066Z","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":"2026-05-14T13:43:25.066Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T13:43:25.066Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}