{"id":"vidhyamitra:city-day:rishikesh:1966-01-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1966-01-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1966-01-20","date_display":"January 20, 1966 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":1966,"month":1,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439145.770833,"kali_year":5067,"ahargana":1850680.2708,"sun":{"sidereal_longitude":276.1658,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":258.5137,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":342.3479,"elapsed_within_tithi_degrees":6.3479},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2,"moon_longitude":258.5137,"elapsed_within_degrees":5.1804},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":174.6795},"karana":{"half_tithi_index":57,"name":"Śakuni"},"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":1966,"month":1,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2439145.770833,"ahargana":1850680.2708,"kali_year":5067,"ayanamsa_lahiri":23.3788,"grahas":{"sun":{"sidereal_longitude":276.156152,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":258.266852,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false,"latitude":-2.6724},"mars":{"sidereal_longitude":299.01375200000007,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":265.719152,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":59.594352000000015,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":286.6966520000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":true},"saturn":{"sidereal_longitude":321.4103520000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":42.0532,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":222.0532,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","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":1966,"month":1,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439145.770833,"kali_year":5067,"ahargana":1850680.2708,"sun":{"sidereal_longitude":276.1658,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":258.5137,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":342.3479,"elapsed_within_tithi_degrees":6.3479},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2,"moon_longitude":258.5137,"elapsed_within_degrees":5.1804},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":174.6795},"karana":{"half_tithi_index":57,"name":"Śakuni"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.672,"elongation":17.652},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.672,"opposition_distance":162.348}},"eclipse_window_40days":[]},"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":"07:13","sunsetLocal":"17:43","solarNoonLocal":"12:28","dayLengthHours":10.49457672805175,"dayLengthDisplay":"10 Hours 29 Mins 40 Secs","nightLengthDisplay":"13 Hours 30 Mins 20 Secs","moonriseLocal":"06:10","moonsetLocal":"16:23","rahuKala":{"name":"Rāhu Kāla","start":"13:47","end":"15:05","startHours":13.776720479960291,"endHours":15.088542570966759,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:13","end":"08:32","startHours":7.2176100249279465,"endHours":8.529432115934416,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:50","end":"11:09","startHours":9.841254206940885,"endHours":11.153076297947353,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:40","end":"10:01","startHours":9.666344594806688,"endHours":10.01616381907508,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:39","end":"07:56","startHours":7.654884055263436,"endHours":7.934739434678149,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:07","end":"12:49","startHours":12.11507916468543,"endHours":12.814717613222214,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:49","end":"06:31","startHours":5.8183331278543795,"endHours":6.517971576391163,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:21","end":"07:13","startHours":6.343061964256967,"endHours":7.2176100249279465,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:13","end":"14:55","startHours":14.21399451029578,"endHours":14.913632958832563,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:31","end":"17:55","startHours":17.512186752979698,"endHours":17.912186752979697,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:43","end":"18:09","startHours":17.712186752979697,"endHours":18.149460783315188,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:28","end":"19:13","startHours":17.462186752979697,"endHours":19.212186752979697,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:07","end":"00:49","startHours":24.11507916468543,"endHours":24.81471761322221,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"07:13","end":"08:32","startHours":7.2176100249279465,"endHours":8.529432115934416,"quality":"auspicious"},{"name":"Roga","start":"08:32","end":"09:50","startHours":8.529432115934416,"endHours":9.841254206940885,"quality":"inauspicious"},{"name":"Udveg","start":"09:50","end":"11:09","startHours":9.841254206940885,"endHours":11.153076297947353,"quality":"inauspicious"},{"name":"Chala","start":"11:09","end":"12:28","startHours":11.153076297947353,"endHours":12.464898388953822,"quality":"neutral"},{"name":"Labha","start":"12:28","end":"13:47","startHours":12.464898388953822,"endHours":13.776720479960291,"quality":"auspicious"},{"name":"Amṛta","start":"13:47","end":"15:05","startHours":13.776720479960291,"endHours":15.088542570966759,"quality":"auspicious"},{"name":"Kāla","start":"15:05","end":"16:24","startHours":15.088542570966759,"endHours":16.400364661973228,"quality":"inauspicious"},{"name":"Śubha","start":"16:24","end":"17:43","startHours":16.400364661973228,"endHours":17.712186752979697,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:43","end":"19:24","startHours":17.712186752979697,"endHours":19.400364661973228,"quality":"auspicious"},{"name":"Kāla","start":"19:24","end":"21:05","startHours":19.400364661973228,"endHours":21.08854257096676,"quality":"inauspicious"},{"name":"Śubha","start":"21:05","end":"22:47","startHours":21.08854257096676,"endHours":22.77672047996029,"quality":"auspicious"},{"name":"Roga","start":"22:47","end":"00:28","startHours":22.77672047996029,"endHours":24.46489838895382,"quality":"inauspicious"},{"name":"Udveg","start":"00:28","end":"02:09","startHours":24.46489838895382,"endHours":26.15307629794735,"quality":"inauspicious"},{"name":"Chala","start":"02:09","end":"03:50","startHours":26.15307629794735,"endHours":27.841254206940885,"quality":"neutral"},{"name":"Labha","start":"03:50","end":"05:32","startHours":27.841254206940885,"endHours":29.529432115934416,"quality":"auspicious"},{"name":"Amṛta","start":"05:32","end":"07:13","startHours":29.529432115934416,"endHours":31.217610024927946,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:13","end":"08:13","startHours":7.2176100249279465,"endHours":8.217610024927946,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"08:13","end":"09:13","startHours":8.217610024927946,"endHours":9.217610024927946,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"09:13","end":"10:13","startHours":9.217610024927946,"endHours":10.217610024927946,"planetary_lord":"Moon"},{"name":"Hora 4","start":"10:13","end":"11:13","startHours":10.217610024927946,"endHours":11.217610024927946,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"11:13","end":"12:13","startHours":11.217610024927946,"endHours":12.217610024927946,"planetary_lord":"Venus"},{"name":"Hora 6","start":"12:13","end":"13:13","startHours":12.217610024927946,"endHours":13.217610024927946,"planetary_lord":"Sun"},{"name":"Hora 7","start":"13:13","end":"14:13","startHours":13.217610024927946,"endHours":14.217610024927946,"planetary_lord":"Mars"},{"name":"Hora 8","start":"14:13","end":"15:13","startHours":14.217610024927946,"endHours":15.217610024927946,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"15:13","end":"16:13","startHours":15.217610024927946,"endHours":16.217610024927946,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"16:13","end":"17:13","startHours":16.217610024927946,"endHours":17.217610024927946,"planetary_lord":"Moon"},{"name":"Hora 11","start":"17:13","end":"18:13","startHours":17.217610024927946,"endHours":18.217610024927946,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"18:13","end":"19:13","startHours":18.217610024927946,"endHours":19.217610024927946,"planetary_lord":"Venus"},{"name":"Hora 13","start":"19:13","end":"20:13","startHours":19.217610024927946,"endHours":20.217610024927946,"planetary_lord":"Sun"},{"name":"Hora 14","start":"20:13","end":"21:13","startHours":20.217610024927946,"endHours":21.217610024927946,"planetary_lord":"Mars"},{"name":"Hora 15","start":"21:13","end":"22:13","startHours":21.217610024927946,"endHours":22.217610024927946,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"22:13","end":"23:13","startHours":22.217610024927946,"endHours":23.217610024927946,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"23:13","end":"00:13","startHours":23.217610024927946,"endHours":24.217610024927946,"planetary_lord":"Moon"},{"name":"Hora 18","start":"00:13","end":"01:13","startHours":24.217610024927946,"endHours":25.217610024927946,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"01:13","end":"02:13","startHours":25.217610024927946,"endHours":26.217610024927946,"planetary_lord":"Venus"},{"name":"Hora 20","start":"02:13","end":"03:13","startHours":26.217610024927946,"endHours":27.217610024927946,"planetary_lord":"Sun"},{"name":"Hora 21","start":"03:13","end":"04:13","startHours":27.217610024927946,"endHours":28.217610024927946,"planetary_lord":"Mars"},{"name":"Hora 22","start":"04:13","end":"05:13","startHours":28.217610024927946,"endHours":29.217610024927946,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"05:13","end":"06:13","startHours":29.217610024927946,"endHours":30.217610024927946,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"06:13","end":"07:13","startHours":30.217610024927946,"endHours":31.217610024927946,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"East","rahuVasa":"North-West","anandadiYoga":{"name":"Śrīvatsa","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-20.245854344631624,"eotMinutes":-10.9643033372293,"ayanamsa":23.3788}},"calendars":{"vikram_samvat":2023,"vikram_samvatsara":"Siddhārthī","saka_samvat":1888,"saka_samvatsara":"Parābhava","bengali_samvat":1373,"malayalam_era":1142,"nanakshahi_year":497,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Caturdaśī · Vikram 2023 Siddhārthī · Śaka 1888 Parābhava"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2},{"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 January 20, 1966 CE · Ṛṣikeśa · Vidhyamitra","description":"January 20, 1966 CE for Ṛṣikeśa: Kṛṣṇa Caturdaśī, sūryodaya 07:13, sūryāsta 17:43.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1966-01-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1966-01-20","sa":"https://sa.vidhyamitra.com/city/rishikesh/1966-01-20","hi":"https://hi.vidhyamitra.com/city/rishikesh/1966-01-20","x-default":"https://vidhyamitra.com/city/rishikesh/1966-01-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-20T04:20:09.429Z","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":"2026-05-20T04:20:09.429Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-20T04:20:09.429Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}