{"id":"vidhyamitra:city-day:rishikesh:1971-02-08:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1971-02-08","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1971-02-08","date_display":"February 8, 1971 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":1971,"month":2,"day":8,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2440990.770833,"kali_year":5072,"ahargana":1852525.2708,"sun":{"sidereal_longitude":295.2933,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":89.5882,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":154.2949,"elapsed_within_tithi_degrees":10.2949},"nakshatra":{"number":7,"name":"Punarvasu","pada":3,"moon_longitude":89.5882,"elapsed_within_degrees":9.5882},"yoga":{"number":2,"name":"Prīti","sum_longitude":24.8815},"karana":{"half_tithi_index":25,"name":"Taitila"},"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":1971,"month":2,"day":8,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2440990.770833,"ahargana":1852525.2708,"kali_year":5072,"ayanamsa_lahiri":23.4493,"grahas":{"sun":{"sidereal_longitude":295.1652590000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":89.86975899999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false,"latitude":2.5605},"mars":{"sidereal_longitude":226.94935899999996,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":277.254359,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":220.97925899999996,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":249.55595900000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":23.092558999999994,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":304.2962,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":124.2962,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","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":1971,"month":2,"day":8,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2440990.770833,"kali_year":5072,"ahargana":1852525.2708,"sun":{"sidereal_longitude":295.2933,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":89.5882,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":154.2949,"elapsed_within_tithi_degrees":10.2949},"nakshatra":{"number":7,"name":"Punarvasu","pada":3,"moon_longitude":89.5882,"elapsed_within_degrees":9.5882},"yoga":{"number":2,"name":"Prīti","sum_longitude":24.8815},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.56,"elongation":154.295},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.56,"opposition_distance":25.705}},"eclipse_window_40days":[{"offset_days":2,"type":"lunar","occurs":true,"moon_latitude":0.69,"opposition_distance":1.965}]},"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":"07:04","sunsetLocal":"17:59","solarNoonLocal":"12:31","dayLengthHours":10.923187984227123,"dayLengthDisplay":"10 Hours 55 Mins 23 Secs","nightLengthDisplay":"13 Hours 04 Mins 37 Secs","moonriseLocal":"15:55","moonsetLocal":"05:46","rahuKala":{"name":"Rāhu Kāla","start":"08:26","end":"09:48","startHours":8.426747407259196,"endHours":9.792145905287587,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:09","end":"12:31","startHours":11.157544403315978,"endHours":12.522942901344368,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:53","end":"15:15","startHours":13.88834139937276,"endHours":15.253739897401147,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:37","end":"09:58","startHours":9.610092772217135,"endHours":9.974199038358039,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:31","end":"07:48","startHours":7.5164817419069365,"endHours":7.80776675481966,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:10","end":"12:53","startHours":12.158836635203462,"endHours":12.887049167485271,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:36","end":"06:20","startHours":5.604923844667189,"endHours":6.333136376948998,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:09","end":"07:04","startHours":6.151083243878546,"endHours":7.061348909230806,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:21","end":"15:04","startHours":14.343474232048887,"endHours":15.071686764330696,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:47","end":"18:11","startHours":17.78453689345793,"endHours":18.184536893457928,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:59","end":"18:26","startHours":17.98453689345793,"endHours":18.43966972613406,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:44","end":"19:29","startHours":17.73453689345793,"endHours":19.48453689345793,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:10","end":"00:53","startHours":24.15883663520346,"endHours":24.88704916748527,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"07:04","end":"08:26","startHours":7.061348909230806,"endHours":8.426747407259196,"quality":"auspicious"},{"name":"Kāla","start":"08:26","end":"09:48","startHours":8.426747407259196,"endHours":9.792145905287587,"quality":"inauspicious"},{"name":"Śubha","start":"09:48","end":"11:09","startHours":9.792145905287587,"endHours":11.157544403315978,"quality":"auspicious"},{"name":"Roga","start":"11:09","end":"12:31","startHours":11.157544403315978,"endHours":12.522942901344368,"quality":"inauspicious"},{"name":"Udveg","start":"12:31","end":"13:53","startHours":12.522942901344368,"endHours":13.88834139937276,"quality":"inauspicious"},{"name":"Chala","start":"13:53","end":"15:15","startHours":13.88834139937276,"endHours":15.253739897401147,"quality":"neutral"},{"name":"Labha","start":"15:15","end":"16:37","startHours":15.253739897401147,"endHours":16.619138395429538,"quality":"auspicious"},{"name":"Amṛta","start":"16:37","end":"17:59","startHours":16.619138395429538,"endHours":17.98453689345793,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:59","end":"19:37","startHours":17.98453689345793,"endHours":19.619138395429538,"quality":"neutral"},{"name":"Labha","start":"19:37","end":"21:15","startHours":19.619138395429538,"endHours":21.253739897401147,"quality":"auspicious"},{"name":"Amṛta","start":"21:15","end":"22:53","startHours":21.253739897401147,"endHours":22.888341399372756,"quality":"auspicious"},{"name":"Kāla","start":"22:53","end":"00:31","startHours":22.888341399372756,"endHours":24.522942901344365,"quality":"inauspicious"},{"name":"Śubha","start":"00:31","end":"02:09","startHours":24.522942901344365,"endHours":26.157544403315974,"quality":"auspicious"},{"name":"Roga","start":"02:09","end":"03:48","startHours":26.157544403315974,"endHours":27.792145905287587,"quality":"inauspicious"},{"name":"Udveg","start":"03:48","end":"05:26","startHours":27.792145905287587,"endHours":29.426747407259196,"quality":"inauspicious"},{"name":"Chala","start":"05:26","end":"07:04","startHours":29.426747407259196,"endHours":31.061348909230805,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"07:04","end":"08:04","startHours":7.061348909230806,"endHours":8.061348909230805,"planetary_lord":"Moon"},{"name":"Hora 2","start":"08:04","end":"09:04","startHours":8.061348909230805,"endHours":9.061348909230805,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"09:04","end":"10:04","startHours":9.061348909230805,"endHours":10.061348909230805,"planetary_lord":"Venus"},{"name":"Hora 4","start":"10:04","end":"11:04","startHours":10.061348909230805,"endHours":11.061348909230805,"planetary_lord":"Sun"},{"name":"Hora 5","start":"11:04","end":"12:04","startHours":11.061348909230805,"endHours":12.061348909230805,"planetary_lord":"Mars"},{"name":"Hora 6","start":"12:04","end":"13:04","startHours":12.061348909230805,"endHours":13.061348909230805,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"13:04","end":"14:04","startHours":13.061348909230805,"endHours":14.061348909230805,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"14:04","end":"15:04","startHours":14.061348909230805,"endHours":15.061348909230805,"planetary_lord":"Moon"},{"name":"Hora 9","start":"15:04","end":"16:04","startHours":15.061348909230805,"endHours":16.061348909230805,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"16:04","end":"17:04","startHours":16.061348909230805,"endHours":17.061348909230805,"planetary_lord":"Venus"},{"name":"Hora 11","start":"17:04","end":"18:04","startHours":17.061348909230805,"endHours":18.061348909230805,"planetary_lord":"Sun"},{"name":"Hora 12","start":"18:04","end":"19:04","startHours":18.061348909230805,"endHours":19.061348909230805,"planetary_lord":"Mars"},{"name":"Hora 13","start":"19:04","end":"20:04","startHours":19.061348909230805,"endHours":20.061348909230805,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"20:04","end":"21:04","startHours":20.061348909230805,"endHours":21.061348909230805,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"21:04","end":"22:04","startHours":21.061348909230805,"endHours":22.061348909230805,"planetary_lord":"Moon"},{"name":"Hora 16","start":"22:04","end":"23:04","startHours":22.061348909230805,"endHours":23.061348909230805,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"23:04","end":"00:04","startHours":23.061348909230805,"endHours":24.061348909230805,"planetary_lord":"Venus"},{"name":"Hora 18","start":"00:04","end":"01:04","startHours":24.061348909230805,"endHours":25.061348909230805,"planetary_lord":"Sun"},{"name":"Hora 19","start":"01:04","end":"02:04","startHours":25.061348909230805,"endHours":26.061348909230805,"planetary_lord":"Mars"},{"name":"Hora 20","start":"02:04","end":"03:04","startHours":26.061348909230805,"endHours":27.061348909230805,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"03:04","end":"04:04","startHours":27.061348909230805,"endHours":28.061348909230805,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"04:04","end":"05:04","startHours":28.061348909230805,"endHours":29.061348909230805,"planetary_lord":"Moon"},{"name":"Hora 23","start":"05:04","end":"06:04","startHours":29.061348909230805,"endHours":30.061348909230805,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"06:04","end":"07:04","startHours":30.061348909230805,"endHours":31.061348909230805,"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","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Chatra","quality":"Auspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-15.245140006981,"eotMinutes":-14.446974080661976,"ayanamsa":23.4493}},"calendars":{"vikram_samvat":2028,"vikram_samvatsara":"Raktākṣī","saka_samvat":1893,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1378,"malayalam_era":1147,"nanakshahi_year":502,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Trayodaśī · Vikram 2028 Raktākṣī · Śaka 1893 Virodhakṛt"},"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":"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":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Punarvasu","url":"/day/-1626101-04-03","relevance":0.5}]},"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 February 8, 1971 CE · Ṛṣikeśa · Vidhyamitra","description":"February 8, 1971 CE for Ṛṣikeśa: Śukla Trayodaśī, sūryodaya 07:04, sūryāsta 17:59.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1971-02-08","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1971-02-08","sa":"https://sa.vidhyamitra.com/city/rishikesh/1971-02-08","hi":"https://hi.vidhyamitra.com/city/rishikesh/1971-02-08","x-default":"https://vidhyamitra.com/city/rishikesh/1971-02-08"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T23:38:56.620Z","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":"2026-05-19T23:38:56.620Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T23:38:56.620Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}