{"id":"vidhyamitra:city-day:rishikesh:1971-04-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1971-04-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1971-04-17","date_display":"April 17, 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":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441058.770833,"kali_year":5073,"ahargana":1852593.2708,"sun":{"sidereal_longitude":3.1224,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":257.5962,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":254.4738,"elapsed_within_tithi_degrees":2.4738},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2,"moon_longitude":257.5962,"elapsed_within_degrees":4.2628},"yoga":{"number":20,"name":"Śiva","sum_longitude":260.7186},"karana":{"half_tithi_index":42,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":4,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441058.770833,"ahargana":1852593.2708,"kali_year":5073,"ayanamsa_lahiri":23.4519,"grahas":{"sun":{"sidereal_longitude":2.9322609999999827,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":254.403861,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false,"latitude":-3.0729},"mars":{"sidereal_longitude":267.79726099999993,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":8.383861000000024,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":true},"jupiter":{"sidereal_longitude":222.813261,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":true},"venus":{"sidereal_longitude":329.022961,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":29.009861,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":300.6932,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":120.6932,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","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":1971,"month":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441058.770833,"kali_year":5073,"ahargana":1852593.2708,"sun":{"sidereal_longitude":3.1224,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":257.5962,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":254.4738,"elapsed_within_tithi_degrees":2.4738},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2,"moon_longitude":257.5962,"elapsed_within_degrees":4.2628},"yoga":{"number":20,"name":"Śiva","sum_longitude":260.7186},"karana":{"half_tithi_index":42,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.073,"elongation":105.526},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.073,"opposition_distance":74.474}},"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":"05:49","sunsetLocal":"18:44","solarNoonLocal":"12:17","dayLengthHours":12.92750050675509,"dayLengthDisplay":"12 Hours 55 Mins 39 Secs","nightLengthDisplay":"11 Hours 04 Mins 21 Secs","moonriseLocal":"23:57","moonsetLocal":"10:08","rahuKala":{"name":"Rāhu Kāla","start":"09:03","end":"10:40","startHours":9.045884056982395,"endHours":10.661821620326782,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:54","end":"15:31","startHours":13.893696747015554,"endHours":15.50963431035994,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:49","end":"07:26","startHours":5.814008930293623,"endHours":7.429946493638009,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:50","end":"09:16","startHours":8.830425715203145,"endHours":9.261342398761647,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:21","end":"06:42","startHours":6.352654784741752,"endHours":6.697388131588554,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:51","end":"12:43","startHours":11.846842500112665,"endHours":12.708675867229672,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:05","end":"04:57","startHours":4.090342196059611,"endHours":4.952175563176617,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:44","end":"05:49","startHours":4.736717221397365,"endHours":5.814008930293623,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:18","startHours":14.432342601463683,"endHours":15.294175968580689,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:32","end":"18:56","startHours":18.541509437048713,"endHours":18.941509437048712,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:44","end":"19:17","startHours":18.741509437048713,"endHours":19.28015529149684,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:29","end":"20:14","startHours":18.491509437048713,"endHours":20.241509437048713,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:51","end":"00:43","startHours":23.846842500112665,"endHours":24.708675867229672,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:49","end":"07:26","startHours":5.814008930293623,"endHours":7.429946493638009,"quality":"inauspicious"},{"name":"Śubha","start":"07:26","end":"09:03","startHours":7.429946493638009,"endHours":9.045884056982395,"quality":"auspicious"},{"name":"Roga","start":"09:03","end":"10:40","startHours":9.045884056982395,"endHours":10.661821620326782,"quality":"inauspicious"},{"name":"Udveg","start":"10:40","end":"12:17","startHours":10.661821620326782,"endHours":12.277759183671169,"quality":"inauspicious"},{"name":"Chala","start":"12:17","end":"13:54","startHours":12.277759183671169,"endHours":13.893696747015554,"quality":"neutral"},{"name":"Labha","start":"13:54","end":"15:31","startHours":13.893696747015554,"endHours":15.50963431035994,"quality":"auspicious"},{"name":"Amṛta","start":"15:31","end":"17:08","startHours":15.50963431035994,"endHours":17.125571873704324,"quality":"auspicious"},{"name":"Kāla","start":"17:08","end":"18:44","startHours":17.125571873704324,"endHours":18.741509437048713,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:44","end":"20:08","startHours":18.741509437048713,"endHours":20.125571873704327,"quality":"auspicious"},{"name":"Amṛta","start":"20:08","end":"21:31","startHours":20.125571873704327,"endHours":21.50963431035994,"quality":"auspicious"},{"name":"Kāla","start":"21:31","end":"22:54","startHours":21.50963431035994,"endHours":22.893696747015554,"quality":"inauspicious"},{"name":"Śubha","start":"22:54","end":"00:17","startHours":22.893696747015554,"endHours":24.27775918367117,"quality":"auspicious"},{"name":"Roga","start":"00:17","end":"01:40","startHours":24.27775918367117,"endHours":25.661821620326783,"quality":"inauspicious"},{"name":"Udveg","start":"01:40","end":"03:03","startHours":25.661821620326783,"endHours":27.045884056982395,"quality":"inauspicious"},{"name":"Chala","start":"03:03","end":"04:26","startHours":27.045884056982395,"endHours":28.42994649363801,"quality":"neutral"},{"name":"Labha","start":"04:26","end":"05:49","startHours":28.42994649363801,"endHours":29.814008930293625,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:49","end":"06:49","startHours":5.814008930293623,"endHours":6.814008930293623,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:49","end":"07:49","startHours":6.814008930293623,"endHours":7.814008930293623,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:49","end":"08:49","startHours":7.814008930293623,"endHours":8.814008930293623,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:49","end":"09:49","startHours":8.814008930293623,"endHours":9.814008930293623,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:49","end":"10:49","startHours":9.814008930293623,"endHours":10.814008930293623,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:49","end":"11:49","startHours":10.814008930293623,"endHours":11.814008930293623,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:49","end":"12:49","startHours":11.814008930293623,"endHours":12.814008930293623,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:49","end":"13:49","startHours":12.814008930293623,"endHours":13.814008930293623,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:49","end":"14:49","startHours":13.814008930293623,"endHours":14.814008930293623,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:49","end":"15:49","startHours":14.814008930293623,"endHours":15.814008930293623,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:49","end":"16:49","startHours":15.814008930293623,"endHours":16.814008930293625,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:49","end":"17:49","startHours":16.814008930293625,"endHours":17.814008930293625,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:49","end":"18:49","startHours":17.814008930293625,"endHours":18.814008930293625,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:49","end":"19:49","startHours":18.814008930293625,"endHours":19.814008930293625,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:49","end":"20:49","startHours":19.814008930293625,"endHours":20.814008930293625,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:49","end":"21:49","startHours":20.814008930293625,"endHours":21.814008930293625,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:49","end":"22:49","startHours":21.814008930293625,"endHours":22.814008930293625,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:49","end":"23:49","startHours":22.814008930293625,"endHours":23.814008930293625,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:49","end":"00:49","startHours":23.814008930293625,"endHours":24.814008930293625,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:49","end":"01:49","startHours":24.814008930293625,"endHours":25.814008930293625,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:49","end":"02:49","startHours":25.814008930293625,"endHours":26.814008930293625,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:49","end":"03:49","startHours":26.814008930293625,"endHours":27.814008930293625,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:49","end":"04:49","startHours":27.814008930293625,"endHours":28.814008930293625,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:49","end":"05:49","startHours":28.814008930293625,"endHours":29.814008930293625,"planetary_lord":"Mercury"}],"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":"East (Pūrva)","chandraVasa":"East","rahuVasa":"East","anandadiYoga":{"name":"Utpāta","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":10.180359355846239,"eotMinutes":0.2640489797298191,"ayanamsa":23.4519}},"calendars":{"vikram_samvat":2028,"vikram_samvatsara":"Raktākṣī","saka_samvat":1893,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1378,"malayalam_era":1147,"nanakshahi_year":502,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Kṛṣṇa Saptamī · Vikram 2028 Raktākṣī · Śaka 1893 Virodhakṛt"},"festivals":[],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 April 17, 1971 CE · Ṛṣikeśa · Vidhyamitra","description":"April 17, 1971 CE for Ṛṣikeśa: Kṛṣṇa Saptamī, sūryodaya 05:49, sūryāsta 18:44.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1971-04-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1971-04-17","sa":"https://sa.vidhyamitra.com/city/rishikesh/1971-04-17","hi":"https://hi.vidhyamitra.com/city/rishikesh/1971-04-17","x-default":"https://vidhyamitra.com/city/rishikesh/1971-04-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T09:33:22.730Z","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":"2026-05-31T09:33:22.730Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T09:33:22.730Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}