{"id":"vidhyamitra:city-day:rishikesh:2177-12-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2177-12-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2177-12-18","date_display":"December 18, 2177 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":2177,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2516544.770833,"kali_year":5279,"ahargana":1928079.2708,"sun":{"sidereal_longitude":239.3281,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":216.0847,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":336.7565,"elapsed_within_tithi_degrees":0.7565},"nakshatra":{"number":17,"name":"Anurādhā","pada":1,"moon_longitude":216.0847,"elapsed_within_degrees":2.7514},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":95.4128},"karana":{"half_tithi_index":56,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":2177,"month":12,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2516544.770833,"ahargana":1928079.2708,"kali_year":5279,"ayanamsa_lahiri":26.339,"grahas":{"sun":{"sidereal_longitude":240.130541,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":216.85914100000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false,"latitude":-3.1802},"mars":{"sidereal_longitude":202.78684099999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":226.01964099999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":1.2572410000000218,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":true},"venus":{"sidereal_longitude":244.47844099999998,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":34.65694100000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":true},"rahu":{"sidereal_longitude":261.0817,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":81.0817,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"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":2177,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2516544.770833,"kali_year":5279,"ahargana":1928079.2708,"sun":{"sidereal_longitude":239.3281,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":216.0847,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":336.7565,"elapsed_within_tithi_degrees":0.7565},"nakshatra":{"number":17,"name":"Anurādhā","pada":1,"moon_longitude":216.0847,"elapsed_within_degrees":2.7514},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":95.4128},"karana":{"half_tithi_index":56,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.18,"elongation":23.243},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.18,"opposition_distance":156.757}},"eclipse_window_40days":[{"offset_days":2,"type":"solar","occurs":true,"moon_latitude":-1.455,"elongation":0.707}]},"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"sunriseLocal":"07:08","sunsetLocal":"17:20","solarNoonLocal":"12:14","dayLengthHours":10.209123310982516,"dayLengthDisplay":"10 Hours 12 Mins 33 Secs","nightLengthDisplay":"13 Hours 47 Mins 27 Secs","moonriseLocal":"05:29","moonsetLocal":"15:53","rahuKala":{"name":"Rāhu Kāla","start":"13:31","end":"14:47","startHours":13.511838291403794,"endHours":14.787978705276608,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:08","end":"08:24","startHours":7.1311362220397205,"endHours":8.407276635912535,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:41","end":"10:58","startHours":9.68341704978535,"endHours":10.959557463658165,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:31","end":"09:51","startHours":9.513264994602308,"endHours":9.853569104968392,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:33","end":"07:50","startHours":7.5565163599973255,"endHours":7.828759648290193,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:35","startHours":11.895393767164895,"endHours":12.576001987897063,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:46","end":"06:27","startHours":5.7699197805753855,"endHours":6.4505280013075526,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:17","end":"07:08","startHours":6.2803759461245106,"endHours":7.1311362220397205,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:56","end":"14:37","startHours":13.937218429361398,"endHours":14.617826650093566,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:08","end":"17:32","startHours":17.14025953302224,"endHours":17.540259533022237,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:20","end":"17:46","startHours":17.340259533022238,"endHours":17.76563967097984,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:05","end":"18:50","startHours":17.090259533022238,"endHours":18.840259533022238,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:35","startHours":23.895393767164897,"endHours":24.576001987897065,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"07:08","end":"08:24","startHours":7.1311362220397205,"endHours":8.407276635912535,"quality":"auspicious"},{"name":"Roga","start":"08:24","end":"09:41","startHours":8.407276635912535,"endHours":9.68341704978535,"quality":"inauspicious"},{"name":"Udveg","start":"09:41","end":"10:58","startHours":9.68341704978535,"endHours":10.959557463658165,"quality":"inauspicious"},{"name":"Chala","start":"10:58","end":"12:14","startHours":10.959557463658165,"endHours":12.235697877530978,"quality":"neutral"},{"name":"Labha","start":"12:14","end":"13:31","startHours":12.235697877530978,"endHours":13.511838291403794,"quality":"auspicious"},{"name":"Amṛta","start":"13:31","end":"14:47","startHours":13.511838291403794,"endHours":14.787978705276608,"quality":"auspicious"},{"name":"Kāla","start":"14:47","end":"16:04","startHours":14.787978705276608,"endHours":16.06411911914942,"quality":"inauspicious"},{"name":"Śubha","start":"16:04","end":"17:20","startHours":16.06411911914942,"endHours":17.340259533022238,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:20","end":"19:04","startHours":17.340259533022238,"endHours":19.064119119149424,"quality":"auspicious"},{"name":"Kāla","start":"19:04","end":"20:47","startHours":19.064119119149424,"endHours":20.787978705276608,"quality":"inauspicious"},{"name":"Śubha","start":"20:47","end":"22:31","startHours":20.787978705276608,"endHours":22.511838291403794,"quality":"auspicious"},{"name":"Roga","start":"22:31","end":"00:14","startHours":22.511838291403794,"endHours":24.23569787753098,"quality":"inauspicious"},{"name":"Udveg","start":"00:14","end":"01:58","startHours":24.23569787753098,"endHours":25.959557463658165,"quality":"inauspicious"},{"name":"Chala","start":"01:58","end":"03:41","startHours":25.959557463658165,"endHours":27.68341704978535,"quality":"neutral"},{"name":"Labha","start":"03:41","end":"05:24","startHours":27.68341704978535,"endHours":29.407276635912538,"quality":"auspicious"},{"name":"Amṛta","start":"05:24","end":"07:08","startHours":29.407276635912538,"endHours":31.13113622203972,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:08","end":"08:08","startHours":7.1311362220397205,"endHours":8.131136222039721,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"08:08","end":"09:08","startHours":8.131136222039721,"endHours":9.131136222039721,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"09:08","end":"10:08","startHours":9.131136222039721,"endHours":10.131136222039721,"planetary_lord":"Moon"},{"name":"Hora 4","start":"10:08","end":"11:08","startHours":10.131136222039721,"endHours":11.131136222039721,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"11:08","end":"12:08","startHours":11.131136222039721,"endHours":12.131136222039721,"planetary_lord":"Venus"},{"name":"Hora 6","start":"12:08","end":"13:08","startHours":12.131136222039721,"endHours":13.131136222039721,"planetary_lord":"Sun"},{"name":"Hora 7","start":"13:08","end":"14:08","startHours":13.131136222039721,"endHours":14.131136222039721,"planetary_lord":"Mars"},{"name":"Hora 8","start":"14:08","end":"15:08","startHours":14.131136222039721,"endHours":15.131136222039721,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"15:08","end":"16:08","startHours":15.131136222039721,"endHours":16.13113622203972,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"16:08","end":"17:08","startHours":16.13113622203972,"endHours":17.13113622203972,"planetary_lord":"Moon"},{"name":"Hora 11","start":"17:08","end":"18:08","startHours":17.13113622203972,"endHours":18.13113622203972,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"18:08","end":"19:08","startHours":18.13113622203972,"endHours":19.13113622203972,"planetary_lord":"Venus"},{"name":"Hora 13","start":"19:08","end":"20:08","startHours":19.13113622203972,"endHours":20.13113622203972,"planetary_lord":"Sun"},{"name":"Hora 14","start":"20:08","end":"21:08","startHours":20.13113622203972,"endHours":21.13113622203972,"planetary_lord":"Mars"},{"name":"Hora 15","start":"21:08","end":"22:08","startHours":21.13113622203972,"endHours":22.13113622203972,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"22:08","end":"23:08","startHours":22.13113622203972,"endHours":23.13113622203972,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"23:08","end":"00:08","startHours":23.13113622203972,"endHours":24.13113622203972,"planetary_lord":"Moon"},{"name":"Hora 18","start":"00:08","end":"01:08","startHours":24.13113622203972,"endHours":25.13113622203972,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"01:08","end":"02:08","startHours":25.13113622203972,"endHours":26.13113622203972,"planetary_lord":"Venus"},{"name":"Hora 20","start":"02:08","end":"03:08","startHours":26.13113622203972,"endHours":27.13113622203972,"planetary_lord":"Sun"},{"name":"Hora 21","start":"03:08","end":"04:08","startHours":27.13113622203972,"endHours":28.13113622203972,"planetary_lord":"Mars"},{"name":"Hora 22","start":"04:08","end":"05:08","startHours":28.13113622203972,"endHours":29.13113622203972,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"05:08","end":"06:08","startHours":29.13113622203972,"endHours":30.13113622203972,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"06:08","end":"07:08","startHours":30.13113622203972,"endHours":31.13113622203972,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"North-East","rahuVasa":"North-West","anandadiYoga":{"name":"Saumya","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":-23.38937197784716,"eotMinutes":2.787727348141232,"ayanamsa":26.339}},"calendars":{"vikram_samvat":2234,"vikram_samvatsara":"Vikṛti","saka_samvat":2099,"saka_samvatsara":"Īśvara","bengali_samvat":1584,"malayalam_era":1353,"nanakshahi_year":708,"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 Caturdaśī · Vikram 2234 Vikṛti · Śaka 2099 Īśvara"},"festivals":[{"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_ingress":"Dhanu"},"precedence":5},{"id":"masika-shivaratri","name":"Māsika Śivarātri","name_sanskrit":"मासिक शिवरात्रि","tradition":"Shaiva","associated_deity":"Śiva","significance":"Monthly Śiva observance.","vrata":true,"detection":{"tithi_number":29,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"rishikesh"},"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, 2177 CE · Ṛṣikeśa · Vidhyamitra","description":"December 18, 2177 CE for Ṛṣikeśa: Kṛṣṇa Caturdaśī, sūryodaya 07:08, sūryāsta 17:20.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2177-12-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2177-12-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/2177-12-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/2177-12-18","x-default":"https://vidhyamitra.com/city/rishikesh/2177-12-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-30T22:51:24.462Z","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":"2026-05-30T22:51:24.462Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-30T22:51:24.462Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}