{"id":"vidhyamitra:city-day:rishikesh:1966-02-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1966-02-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1966-02-21","date_display":"February 21, 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":2,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439177.770833,"kali_year":5067,"ahargana":1850712.2708,"sun":{"sidereal_longitude":308.7892,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":316.4508,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.6616,"elapsed_within_tithi_degrees":7.6616},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3,"moon_longitude":316.4508,"elapsed_within_degrees":9.7842},"yoga":{"number":20,"name":"Śiva","sum_longitude":265.24},"karana":{"half_tithi_index":1,"name":"Bava"},"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":1966,"month":2,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2439177.770833,"ahargana":1850712.2708,"kali_year":5067,"ayanamsa_lahiri":23.38,"grahas":{"sun":{"sidereal_longitude":308.584029,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":314.949529,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false,"latitude":-4.4745},"mars":{"sidereal_longitude":324.25082900000007,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":321.039229,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":58.51772900000003,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":275.7161289999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":324.967229,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":40.3576,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":220.3576,"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":2,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439177.770833,"kali_year":5067,"ahargana":1850712.2708,"sun":{"sidereal_longitude":308.7892,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":316.4508,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.6616,"elapsed_within_tithi_degrees":7.6616},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3,"moon_longitude":316.4508,"elapsed_within_degrees":9.7842},"yoga":{"number":20,"name":"Śiva","sum_longitude":265.24},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.475,"elongation":7.662},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.475,"opposition_distance":172.338}},"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":"06:52","sunsetLocal":"18:10","solarNoonLocal":"12:31","dayLengthHours":11.28734408430612,"dayLengthDisplay":"11 Hours 17 Mins 14 Secs","nightLengthDisplay":"12 Hours 42 Mins 46 Secs","moonriseLocal":"07:14","moonsetLocal":"18:40","rahuKala":{"name":"Rāhu Kāla","start":"08:17","end":"09:42","startHours":8.285903340739145,"endHours":9.69682135127741,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:06","end":"12:31","startHours":11.107739361815675,"endHours":12.518657372353939,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:56","end":"15:20","startHours":13.929575382892205,"endHours":15.34049339343047,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:31","end":"09:53","startHours":9.508698949872308,"endHours":9.884943752682512,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:21","end":"07:39","startHours":7.345291333713635,"endHours":7.646287175961798,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:09","end":"12:54","startHours":12.142412569543735,"endHours":12.894902175164143,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:22","end":"06:07","startHours":5.370006118960063,"endHours":6.122495724580472,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:56","end":"06:52","startHours":5.93437332317537,"endHours":6.87498533020088,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:24","end":"15:09","startHours":14.39988138640496,"endHours":15.152370992025368,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:58","end":"18:22","startHours":17.962329414507,"endHours":18.362329414507,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:10","end":"18:38","startHours":18.162329414507,"endHours":18.632635418019753,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:55","end":"19:40","startHours":17.912329414507,"endHours":19.662329414507,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:09","end":"00:54","startHours":24.142412569543733,"endHours":24.894902175164145,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:52","end":"08:17","startHours":6.87498533020088,"endHours":8.285903340739145,"quality":"auspicious"},{"name":"Kāla","start":"08:17","end":"09:42","startHours":8.285903340739145,"endHours":9.69682135127741,"quality":"inauspicious"},{"name":"Śubha","start":"09:42","end":"11:06","startHours":9.69682135127741,"endHours":11.107739361815675,"quality":"auspicious"},{"name":"Roga","start":"11:06","end":"12:31","startHours":11.107739361815675,"endHours":12.518657372353939,"quality":"inauspicious"},{"name":"Udveg","start":"12:31","end":"13:56","startHours":12.518657372353939,"endHours":13.929575382892205,"quality":"inauspicious"},{"name":"Chala","start":"13:56","end":"15:20","startHours":13.929575382892205,"endHours":15.34049339343047,"quality":"neutral"},{"name":"Labha","start":"15:20","end":"16:45","startHours":15.34049339343047,"endHours":16.751411403968735,"quality":"auspicious"},{"name":"Amṛta","start":"16:45","end":"18:10","startHours":16.751411403968735,"endHours":18.162329414507,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:10","end":"19:45","startHours":18.162329414507,"endHours":19.751411403968735,"quality":"neutral"},{"name":"Labha","start":"19:45","end":"21:20","startHours":19.751411403968735,"endHours":21.34049339343047,"quality":"auspicious"},{"name":"Amṛta","start":"21:20","end":"22:56","startHours":21.34049339343047,"endHours":22.929575382892203,"quality":"auspicious"},{"name":"Kāla","start":"22:56","end":"00:31","startHours":22.929575382892203,"endHours":24.51865737235394,"quality":"inauspicious"},{"name":"Śubha","start":"00:31","end":"02:06","startHours":24.51865737235394,"endHours":26.107739361815675,"quality":"auspicious"},{"name":"Roga","start":"02:06","end":"03:42","startHours":26.107739361815675,"endHours":27.696821351277407,"quality":"inauspicious"},{"name":"Udveg","start":"03:42","end":"05:17","startHours":27.696821351277407,"endHours":29.285903340739143,"quality":"inauspicious"},{"name":"Chala","start":"05:17","end":"06:52","startHours":29.285903340739143,"endHours":30.87498533020088,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:52","end":"07:52","startHours":6.87498533020088,"endHours":7.87498533020088,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:52","end":"08:52","startHours":7.87498533020088,"endHours":8.874985330200879,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:52","end":"09:52","startHours":8.874985330200879,"endHours":9.874985330200879,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:52","end":"10:52","startHours":9.874985330200879,"endHours":10.874985330200879,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:52","end":"11:52","startHours":10.874985330200879,"endHours":11.874985330200879,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:52","end":"12:52","startHours":11.874985330200879,"endHours":12.874985330200879,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:52","end":"13:52","startHours":12.874985330200879,"endHours":13.874985330200879,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:52","end":"14:52","startHours":13.874985330200879,"endHours":14.874985330200879,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:52","end":"15:52","startHours":14.874985330200879,"endHours":15.874985330200879,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:52","end":"16:52","startHours":15.874985330200879,"endHours":16.87498533020088,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:52","end":"17:52","startHours":16.87498533020088,"endHours":17.87498533020088,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:52","end":"18:52","startHours":17.87498533020088,"endHours":18.87498533020088,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:52","end":"19:52","startHours":18.87498533020088,"endHours":19.87498533020088,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:52","end":"20:52","startHours":19.87498533020088,"endHours":20.87498533020088,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:52","end":"21:52","startHours":20.87498533020088,"endHours":21.87498533020088,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:52","end":"22:52","startHours":21.87498533020088,"endHours":22.87498533020088,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:52","end":"23:52","startHours":22.87498533020088,"endHours":23.87498533020088,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:52","end":"00:52","startHours":23.87498533020088,"endHours":24.87498533020088,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:52","end":"01:52","startHours":24.87498533020088,"endHours":25.87498533020088,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:52","end":"02:52","startHours":25.87498533020088,"endHours":26.87498533020088,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:52","end":"03:52","startHours":26.87498533020088,"endHours":27.87498533020088,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:52","end":"04:52","startHours":27.87498533020088,"endHours":28.87498533020088,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:52","end":"05:52","startHours":28.87498533020088,"endHours":29.87498533020088,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:52","end":"06:52","startHours":29.87498533020088,"endHours":30.87498533020088,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Dhātṛ","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-10.77452310914835,"eotMinutes":-14.189842341236304,"ayanamsa":23.38}},"calendars":{"vikram_samvat":2023,"vikram_samvatsara":"Siddhārthī","saka_samvat":1888,"saka_samvatsara":"Parābhava","bengali_samvat":1373,"malayalam_era":1142,"nanakshahi_year":497,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Phālguna","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Śukla Pratipada · Vikram 2023 Siddhārthī · Śaka 1888 Parābhava"},"festivals":[],"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":[]},"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 21, 1966 CE · Ṛṣikeśa · Vidhyamitra","description":"February 21, 1966 CE for Ṛṣikeśa: Śukla Pratipada, sūryodaya 06:52, sūryāsta 18:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1966-02-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1966-02-21","sa":"https://sa.vidhyamitra.com/city/rishikesh/1966-02-21","hi":"https://hi.vidhyamitra.com/city/rishikesh/1966-02-21","x-default":"https://vidhyamitra.com/city/rishikesh/1966-02-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T05:58:08.701Z","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":"2026-06-02T05:58:08.701Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T05:58:08.701Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}