{"id":"vidhyamitra:city-day:mathura:1981-12-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mathura/1981-12-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-12-11","date_display":"December 11, 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":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444949.770833,"kali_year":5083,"ahargana":1856484.2708,"sun":{"sidereal_longitude":234.9352,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":50.5395,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":175.6043,"elapsed_within_tithi_degrees":7.6043},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4,"moon_longitude":50.5395,"elapsed_within_degrees":10.5395},"yoga":{"number":22,"name":"Sādhya","sum_longitude":285.4747},"karana":{"half_tithi_index":29,"name":"Bava"},"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":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444949.770833,"ahargana":1856484.2708,"kali_year":5083,"ayanamsa_lahiri":23.6008,"grahas":{"sun":{"sidereal_longitude":235.310697,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":50.65249699999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false,"latitude":-3.1237},"mars":{"sidereal_longitude":154.24739699999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":235.772197,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":189.44329700000003,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":278.11889700000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":176.13239699999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":94.5293,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":274.5293,"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":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444949.770833,"kali_year":5083,"ahargana":1856484.2708,"sun":{"sidereal_longitude":234.9352,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":50.5395,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":175.6043,"elapsed_within_tithi_degrees":7.6043},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4,"moon_longitude":50.5395,"elapsed_within_degrees":10.5395},"yoga":{"number":22,"name":"Sādhya","sum_longitude":285.4747},"karana":{"half_tithi_index":29,"name":"Bava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.124,"elongation":175.604},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.124,"opposition_distance":4.396}},"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":"07:00","sunsetLocal":"17:27","solarNoonLocal":"12:13","dayLengthHours":10.439802242388488,"dayLengthDisplay":"10 Hours 26 Mins 23 Secs","nightLengthDisplay":"13 Hours 33 Mins 37 Secs","moonriseLocal":"17:02","moonsetLocal":"06:47","rahuKala":{"name":"Rāhu Kāla","start":"10:55","end":"12:13","startHours":10.916976674959226,"endHours":12.221951955257786,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:50","end":"16:08","startHours":14.83190251585491,"endHours":16.13687779615347,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:18","end":"09:37","startHours":8.307026114362104,"endHours":9.612001394660666,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:47","startHours":9.438004690620858,"endHours":9.785998098700473,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:26","end":"07:43","startHours":7.437042594163064,"endHours":7.715437320626757,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.87395854717817,"endHours":12.569945363337403,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:37","end":"06:18","startHours":5.610077201745078,"endHours":6.306064017904311,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:08","end":"07:00","startHours":6.1320673138645025,"endHours":7.002050834063543,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:58","end":"14:39","startHours":13.961918995655868,"endHours":14.6579058118151,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:15","end":"17:39","startHours":17.24185307645203,"endHours":17.64185307645203,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:27","end":"17:53","startHours":17.44185307645203,"endHours":17.87684483655155,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:12","end":"18:57","startHours":17.19185307645203,"endHours":18.94185307645203,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.87395854717817,"endHours":24.569945363337403,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:00","end":"08:18","startHours":7.002050834063543,"endHours":8.307026114362104,"quality":"neutral"},{"name":"Labha","start":"08:18","end":"09:37","startHours":8.307026114362104,"endHours":9.612001394660666,"quality":"auspicious"},{"name":"Amṛta","start":"09:37","end":"10:55","startHours":9.612001394660666,"endHours":10.916976674959226,"quality":"auspicious"},{"name":"Kāla","start":"10:55","end":"12:13","startHours":10.916976674959226,"endHours":12.221951955257786,"quality":"inauspicious"},{"name":"Śubha","start":"12:13","end":"13:32","startHours":12.221951955257786,"endHours":13.526927235556348,"quality":"auspicious"},{"name":"Roga","start":"13:32","end":"14:50","startHours":13.526927235556348,"endHours":14.83190251585491,"quality":"inauspicious"},{"name":"Udveg","start":"14:50","end":"16:08","startHours":14.83190251585491,"endHours":16.13687779615347,"quality":"inauspicious"},{"name":"Chala","start":"16:08","end":"17:27","startHours":16.13687779615347,"endHours":17.44185307645203,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:27","end":"19:08","startHours":17.44185307645203,"endHours":19.13687779615347,"quality":"inauspicious"},{"name":"Udveg","start":"19:08","end":"20:50","startHours":19.13687779615347,"endHours":20.831902515854907,"quality":"inauspicious"},{"name":"Chala","start":"20:50","end":"22:32","startHours":20.831902515854907,"endHours":22.526927235556347,"quality":"neutral"},{"name":"Labha","start":"22:32","end":"00:13","startHours":22.526927235556347,"endHours":24.221951955257786,"quality":"auspicious"},{"name":"Amṛta","start":"00:13","end":"01:55","startHours":24.221951955257786,"endHours":25.916976674959226,"quality":"auspicious"},{"name":"Kāla","start":"01:55","end":"03:37","startHours":25.916976674959226,"endHours":27.612001394660666,"quality":"inauspicious"},{"name":"Śubha","start":"03:37","end":"05:18","startHours":27.612001394660666,"endHours":29.307026114362102,"quality":"auspicious"},{"name":"Roga","start":"05:18","end":"07:00","startHours":29.307026114362102,"endHours":31.002050834063542,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:00","end":"08:00","startHours":7.002050834063543,"endHours":8.002050834063542,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:00","end":"09:00","startHours":8.002050834063542,"endHours":9.002050834063542,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:00","end":"10:00","startHours":9.002050834063542,"endHours":10.002050834063542,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:00","end":"11:00","startHours":10.002050834063542,"endHours":11.002050834063542,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:00","end":"12:00","startHours":11.002050834063542,"endHours":12.002050834063542,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:00","end":"13:00","startHours":12.002050834063542,"endHours":13.002050834063542,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:00","end":"14:00","startHours":13.002050834063542,"endHours":14.002050834063542,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:00","end":"15:00","startHours":14.002050834063542,"endHours":15.002050834063542,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:00","end":"16:00","startHours":15.002050834063542,"endHours":16.002050834063542,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:00","end":"17:00","startHours":16.002050834063542,"endHours":17.002050834063542,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:00","end":"18:00","startHours":17.002050834063542,"endHours":18.002050834063542,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:00","end":"19:00","startHours":18.002050834063542,"endHours":19.002050834063542,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:00","end":"20:00","startHours":19.002050834063542,"endHours":20.002050834063542,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:00","end":"21:00","startHours":20.002050834063542,"endHours":21.002050834063542,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:00","end":"22:00","startHours":21.002050834063542,"endHours":22.002050834063542,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:00","end":"23:00","startHours":22.002050834063542,"endHours":23.002050834063542,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:00","end":"00:00","startHours":23.002050834063542,"endHours":24.002050834063542,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:00","end":"01:00","startHours":24.002050834063542,"endHours":25.002050834063542,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:00","end":"02:00","startHours":25.002050834063542,"endHours":26.002050834063542,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:00","end":"03:00","startHours":26.002050834063542,"endHours":27.002050834063542,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:00","end":"04:00","startHours":27.002050834063542,"endHours":28.002050834063542,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:00","end":"05:00","startHours":28.002050834063542,"endHours":29.002050834063542,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:00","end":"06:00","startHours":29.002050834063542,"endHours":30.002050834063542,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:00","end":"07:00","startHours":30.002050834063542,"endHours":31.002050834063542,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"South-East","anandadiYoga":{"name":"Mātaṇga","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Śarad (Autumn)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-22.97362207369124,"eotMinutes":5.988082684532823,"ayanamsa":23.6008}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Pūrṇimā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"datta-jayanti","name":"Datta Jayantī","name_sanskrit":"दत्त जयन्ती","tradition":"Pan-Hindu","associated_deity":"Dattātreya (Brahmā + Viṣṇu + Śiva combined)","significance":"Birth of Dattātreya from Atri-Anusūyā; tri-mūrti unified avatāra.","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":2,"sources":["Mārkaṇḍeya Purāṇa","Bhāgavata 4.1.15"]},{"id":"annapurna-jayanti","name":"Annapūrṇā Jayantī","name_sanskrit":"अन्नपूर्णा जयन्ती","tradition":"Shakta","associated_deity":"Devī Annapūrṇā (Pārvatī as nourishing mother)","significance":"Devī Annapūrṇā's manifestation; food-grain pūjā; Mārgaśīrṣa Pūrṇimā tradition.","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":3,"sources":["Annapūrṇā-stotra by Śaṅkarācārya"]},{"id":"vrischika-sankranti","name":"Vṛścika Saṅkrānti","name_sanskrit":"वृश्चिक सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Scorpio.","vrata":false,"detection":{"sun_rashi":"Vṛścika"},"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 Rohiṇī","url":"/day/-3226-07-09","relevance":0.5},{"historical_date":"-3137-10-04","event":"Mahābhārata Day 1 (Bhagavad Gītā delivered)","chart_id":"krishna","shared_marker":"same Śukla Pūrṇimā","url":"/day/-3137-10-04","relevance":0.5},{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Śukla Pūrṇimā","url":"/day/-0562-04-11","relevance":0.5}]},"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 December 11, 1981 CE · Mathurā · Vidhyamitra","description":"December 11, 1981 CE for Mathurā: Śukla Pūrṇimā, sūryodaya 07:00, sūryāsta 17:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mathura/1981-12-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mathura/1981-12-11","sa":"https://sa.vidhyamitra.com/city/mathura/1981-12-11","hi":"https://hi.vidhyamitra.com/city/mathura/1981-12-11","x-default":"https://vidhyamitra.com/city/mathura/1981-12-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T13:39:34.215Z","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":"2026-05-14T13:39:34.215Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T13:39:34.215Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}