{"id":"vidhyamitra:city-day:vrindavan:2131-12-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/vrindavan/2131-12-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2131-12-17","date_display":"December 17, 2131 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":2131,"month":12,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499741.770833,"kali_year":5233,"ahargana":1911276.2708,"sun":{"sidereal_longitude":238.2025,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":207.8849,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":329.6823,"elapsed_within_tithi_degrees":5.6823},"nakshatra":{"number":16,"name":"Viśākhā","pada":3,"moon_longitude":207.8849,"elapsed_within_degrees":7.8849},"yoga":{"number":7,"name":"Sukarma","sum_longitude":86.0874},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":2131,"month":12,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2499741.770833,"ahargana":1911276.2708,"kali_year":5233,"ayanamsa_lahiri":25.6963,"grahas":{"sun":{"sidereal_longitude":238.90573900000004,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":209.905039,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":3},"retrograde":false,"latitude":3.096},"mars":{"sidereal_longitude":6.469338999999991,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":225.07823899999994,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":58.652439000000015,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":275.446239,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":205.648639,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":71.3855,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":251.3855,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","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":2131,"month":12,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499741.770833,"kali_year":5233,"ahargana":1911276.2708,"sun":{"sidereal_longitude":238.2025,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":207.8849,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":329.6823,"elapsed_within_tithi_degrees":5.6823},"nakshatra":{"number":16,"name":"Viśākhā","pada":3,"moon_longitude":207.8849,"elapsed_within_degrees":7.8849},"yoga":{"number":7,"name":"Sukarma","sum_longitude":86.0874},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.096,"elongation":30.318},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.096,"opposition_distance":149.682}},"eclipse_window_40days":[{"offset_days":17,"type":"lunar","occurs":true,"moon_latitude":0.546,"opposition_distance":1.791}]},"city":{"slug":"vrindavan","name":"Vṛndāvana","lat":27.565,"lon":77.6593,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"vrindavan","name":"Vṛndāvana","lat":27.565,"lon":77.6593,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"07:04","sunsetLocal":"17:28","solarNoonLocal":"12:16","dayLengthHours":10.405255742625556,"dayLengthDisplay":"10 Hours 24 Mins 19 Secs","nightLengthDisplay":"13 Hours 35 Mins 41 Secs","moonriseLocal":"04:59","moonsetLocal":"15:41","rahuKala":{"name":"Rāhu Kāla","start":"08:22","end":"09:40","startHours":8.366519615230278,"endHours":9.66717658305847,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:58","end":"12:16","startHours":10.967833550886667,"endHours":12.26849051871486,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:34","end":"14:52","startHours":13.569147486543056,"endHours":14.869804454371248,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:30","end":"09:50","startHours":9.493755654014713,"endHours":9.840597512102232,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:30","end":"07:47","startHours":7.499414970011481,"endHours":7.776888456481496,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:37","startHours":11.92164866062734,"endHours":12.615332376802378,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:41","end":"06:22","startHours":5.678495215052008,"endHours":6.372178931227046,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:12","end":"07:04","startHours":6.198758002183286,"endHours":7.065862647402082,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:00","end":"14:42","startHours":14.002699809152453,"endHours":14.69638352532749,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:16","end":"17:40","startHours":17.271118390027638,"endHours":17.671118390027637,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:28","end":"17:54","startHours":17.471118390027637,"endHours":17.904670712637035,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:13","end":"18:58","startHours":17.221118390027637,"endHours":18.971118390027637,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:37","startHours":23.92164866062734,"endHours":24.615332376802378,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"07:04","end":"08:22","startHours":7.065862647402082,"endHours":8.366519615230278,"quality":"auspicious"},{"name":"Kāla","start":"08:22","end":"09:40","startHours":8.366519615230278,"endHours":9.66717658305847,"quality":"inauspicious"},{"name":"Śubha","start":"09:40","end":"10:58","startHours":9.66717658305847,"endHours":10.967833550886667,"quality":"auspicious"},{"name":"Roga","start":"10:58","end":"12:16","startHours":10.967833550886667,"endHours":12.26849051871486,"quality":"inauspicious"},{"name":"Udveg","start":"12:16","end":"13:34","startHours":12.26849051871486,"endHours":13.569147486543056,"quality":"inauspicious"},{"name":"Chala","start":"13:34","end":"14:52","startHours":13.569147486543056,"endHours":14.869804454371248,"quality":"neutral"},{"name":"Labha","start":"14:52","end":"16:10","startHours":14.869804454371248,"endHours":16.170461422199445,"quality":"auspicious"},{"name":"Amṛta","start":"16:10","end":"17:28","startHours":16.170461422199445,"endHours":17.471118390027637,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:28","end":"19:10","startHours":17.471118390027637,"endHours":19.170461422199445,"quality":"neutral"},{"name":"Labha","start":"19:10","end":"20:52","startHours":19.170461422199445,"endHours":20.86980445437125,"quality":"auspicious"},{"name":"Amṛta","start":"20:52","end":"22:34","startHours":20.86980445437125,"endHours":22.569147486543052,"quality":"auspicious"},{"name":"Kāla","start":"22:34","end":"00:16","startHours":22.569147486543052,"endHours":24.26849051871486,"quality":"inauspicious"},{"name":"Śubha","start":"00:16","end":"01:58","startHours":24.26849051871486,"endHours":25.967833550886667,"quality":"auspicious"},{"name":"Roga","start":"01:58","end":"03:40","startHours":25.967833550886667,"endHours":27.66717658305847,"quality":"inauspicious"},{"name":"Udveg","start":"03:40","end":"05:22","startHours":27.66717658305847,"endHours":29.366519615230274,"quality":"inauspicious"},{"name":"Chala","start":"05:22","end":"07:04","startHours":29.366519615230274,"endHours":31.06586264740208,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"07:04","end":"08:04","startHours":7.065862647402082,"endHours":8.065862647402081,"planetary_lord":"Moon"},{"name":"Hora 2","start":"08:04","end":"09:04","startHours":8.065862647402081,"endHours":9.065862647402081,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"09:04","end":"10:04","startHours":9.065862647402081,"endHours":10.065862647402081,"planetary_lord":"Venus"},{"name":"Hora 4","start":"10:04","end":"11:04","startHours":10.065862647402081,"endHours":11.065862647402081,"planetary_lord":"Sun"},{"name":"Hora 5","start":"11:04","end":"12:04","startHours":11.065862647402081,"endHours":12.065862647402081,"planetary_lord":"Mars"},{"name":"Hora 6","start":"12:04","end":"13:04","startHours":12.065862647402081,"endHours":13.065862647402081,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"13:04","end":"14:04","startHours":13.065862647402081,"endHours":14.065862647402081,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"14:04","end":"15:04","startHours":14.065862647402081,"endHours":15.065862647402081,"planetary_lord":"Moon"},{"name":"Hora 9","start":"15:04","end":"16:04","startHours":15.065862647402081,"endHours":16.06586264740208,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"16:04","end":"17:04","startHours":16.06586264740208,"endHours":17.06586264740208,"planetary_lord":"Venus"},{"name":"Hora 11","start":"17:04","end":"18:04","startHours":17.06586264740208,"endHours":18.06586264740208,"planetary_lord":"Sun"},{"name":"Hora 12","start":"18:04","end":"19:04","startHours":18.06586264740208,"endHours":19.06586264740208,"planetary_lord":"Mars"},{"name":"Hora 13","start":"19:04","end":"20:04","startHours":19.06586264740208,"endHours":20.06586264740208,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"20:04","end":"21:04","startHours":20.06586264740208,"endHours":21.06586264740208,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"21:04","end":"22:04","startHours":21.06586264740208,"endHours":22.06586264740208,"planetary_lord":"Moon"},{"name":"Hora 16","start":"22:04","end":"23:04","startHours":22.06586264740208,"endHours":23.06586264740208,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"23:04","end":"00:04","startHours":23.06586264740208,"endHours":24.06586264740208,"planetary_lord":"Venus"},{"name":"Hora 18","start":"00:04","end":"01:04","startHours":24.06586264740208,"endHours":25.06586264740208,"planetary_lord":"Sun"},{"name":"Hora 19","start":"01:04","end":"02:04","startHours":25.06586264740208,"endHours":26.06586264740208,"planetary_lord":"Mars"},{"name":"Hora 20","start":"02:04","end":"03:04","startHours":26.06586264740208,"endHours":27.06586264740208,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"03:04","end":"04:04","startHours":27.06586264740208,"endHours":28.06586264740208,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"04:04","end":"05:04","startHours":28.06586264740208,"endHours":29.06586264740208,"planetary_lord":"Moon"},{"name":"Hora 23","start":"05:04","end":"06:04","startHours":29.06586264740208,"endHours":30.06586264740208,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"06:04","end":"07:04","startHours":30.06586264740208,"endHours":31.06586264740208,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"North","rahuVasa":"North-East","anandadiYoga":{"name":"Śubha","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.326399496545033,"eotMinutes":3.253368877108411,"ayanamsa":25.6963}},"calendars":{"vikram_samvat":2188,"vikram_samvatsara":"Krodhi","saka_samvat":2053,"saka_samvatsara":"Khara","bengali_samvat":1538,"malayalam_era":1307,"nanakshahi_year":662,"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":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Kṛṣṇa Trayodaśī · Vikram 2188 Krodhi · Śaka 2053 Khara"},"festivals":[{"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":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Viśākhā","url":"/day/-0562-04-11","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"vrindavan"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga December 17, 2131 CE · Vṛndāvana · Vidhyamitra","description":"December 17, 2131 CE for Vṛndāvana: Kṛṣṇa Trayodaśī, sūryodaya 07:04, sūryāsta 17:28.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/vrindavan/2131-12-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/vrindavan/2131-12-17","sa":"https://sa.vidhyamitra.com/city/vrindavan/2131-12-17","hi":"https://hi.vidhyamitra.com/city/vrindavan/2131-12-17","x-default":"https://vidhyamitra.com/city/vrindavan/2131-12-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T15:37:36.139Z","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":"2026-06-01T15:37:36.139Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T15:37:36.139Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}