{"id":"vidhyamitra:city-day:rishikesh:1937-04-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1937-04-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1937-04-17","date_display":"April 17, 1937 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":1937,"month":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2428640.770833,"kali_year":5039,"ahargana":1840175.2708,"sun":{"sidereal_longitude":3.8995,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":80.5126,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":76.6131,"elapsed_within_tithi_degrees":4.6131},"nakshatra":{"number":7,"name":"Punarvasu","pada":1,"moon_longitude":80.5126,"elapsed_within_degrees":0.5126},"yoga":{"number":7,"name":"Sukarma","sum_longitude":84.412},"karana":{"half_tithi_index":12,"name":"Gara"},"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":1937,"month":4,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2428640.770833,"ahargana":1840175.2708,"kali_year":5039,"ayanamsa_lahiri":22.977,"grahas":{"sun":{"sidereal_longitude":3.633420000000001,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":83.33272,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false,"latitude":-1.6736},"mars":{"sidereal_longitude":223.32682,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":24.068719999999985,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":273.89032,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":6.207220000000007,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":true},"saturn":{"sidereal_longitude":336.57492,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":238.6586,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":58.6586,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","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":1937,"month":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2428640.770833,"kali_year":5039,"ahargana":1840175.2708,"sun":{"sidereal_longitude":3.8995,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":80.5126,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":76.6131,"elapsed_within_tithi_degrees":4.6131},"nakshatra":{"number":7,"name":"Punarvasu","pada":1,"moon_longitude":80.5126,"elapsed_within_degrees":0.5126},"yoga":{"number":7,"name":"Sukarma","sum_longitude":84.412},"karana":{"half_tithi_index":12,"name":"Gara"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.674,"elongation":76.613},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.674,"opposition_distance":103.387}},"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":"18:45","solarNoonLocal":"12:17","dayLengthHours":12.934110482416543,"dayLengthDisplay":"12 Hours 56 Mins 03 Secs","nightLengthDisplay":"11 Hours 03 Mins 57 Secs","moonriseLocal":"10:37","moonsetLocal":"00:34","rahuKala":{"name":"Rāhu Kāla","start":"09:03","end":"10:40","startHours":9.044231563067033,"endHours":10.6609953733691,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:54","end":"15:31","startHours":13.894522993973236,"endHours":15.511286804275304,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:49","end":"07:26","startHours":5.810703942462896,"endHours":7.427467752764964,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:50","end":"09:16","startHours":8.828663055026755,"endHours":9.259800071107307,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:21","end":"06:42","startHours":6.349625212563586,"endHours":6.694534825428027,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:51","end":"12:43","startHours":11.846622167590617,"endHours":12.70889619975172,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:05","end":"04:57","startHours":4.086155878140691,"endHours":4.948429910301794,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:44","end":"05:49","startHours":4.732861402261518,"endHours":5.810703942462896,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:18","startHours":14.433444264073927,"endHours":15.29571829623503,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:33","end":"18:57","startHours":18.54481442487944,"endHours":18.94481442487944,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:45","end":"19:17","startHours":18.74481442487944,"endHours":19.28373569498013,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:30","end":"20:15","startHours":18.49481442487944,"endHours":20.24481442487944,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:51","end":"00:43","startHours":23.846622167590617,"endHours":24.70889619975172,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:49","end":"07:26","startHours":5.810703942462896,"endHours":7.427467752764964,"quality":"inauspicious"},{"name":"Śubha","start":"07:26","end":"09:03","startHours":7.427467752764964,"endHours":9.044231563067033,"quality":"auspicious"},{"name":"Roga","start":"09:03","end":"10:40","startHours":9.044231563067033,"endHours":10.6609953733691,"quality":"inauspicious"},{"name":"Udveg","start":"10:40","end":"12:17","startHours":10.6609953733691,"endHours":12.277759183671169,"quality":"inauspicious"},{"name":"Chala","start":"12:17","end":"13:54","startHours":12.277759183671169,"endHours":13.894522993973236,"quality":"neutral"},{"name":"Labha","start":"13:54","end":"15:31","startHours":13.894522993973236,"endHours":15.511286804275304,"quality":"auspicious"},{"name":"Amṛta","start":"15:31","end":"17:08","startHours":15.511286804275304,"endHours":17.128050614577372,"quality":"auspicious"},{"name":"Kāla","start":"17:08","end":"18:45","startHours":17.128050614577372,"endHours":18.74481442487944,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:45","end":"20:08","startHours":18.74481442487944,"endHours":20.128050614577372,"quality":"auspicious"},{"name":"Amṛta","start":"20:08","end":"21:31","startHours":20.128050614577372,"endHours":21.511286804275304,"quality":"auspicious"},{"name":"Kāla","start":"21:31","end":"22:54","startHours":21.511286804275304,"endHours":22.894522993973236,"quality":"inauspicious"},{"name":"Śubha","start":"22:54","end":"00:17","startHours":22.894522993973236,"endHours":24.27775918367117,"quality":"auspicious"},{"name":"Roga","start":"00:17","end":"01:40","startHours":24.27775918367117,"endHours":25.6609953733691,"quality":"inauspicious"},{"name":"Udveg","start":"01:40","end":"03:03","startHours":25.6609953733691,"endHours":27.044231563067033,"quality":"inauspicious"},{"name":"Chala","start":"03:03","end":"04:26","startHours":27.044231563067033,"endHours":28.427467752764965,"quality":"neutral"},{"name":"Labha","start":"04:26","end":"05:49","startHours":28.427467752764965,"endHours":29.810703942462897,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:49","end":"06:49","startHours":5.810703942462896,"endHours":6.810703942462896,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:49","end":"07:49","startHours":6.810703942462896,"endHours":7.810703942462896,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:49","end":"08:49","startHours":7.810703942462896,"endHours":8.810703942462897,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:49","end":"09:49","startHours":8.810703942462897,"endHours":9.810703942462897,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:49","end":"10:49","startHours":9.810703942462897,"endHours":10.810703942462897,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:49","end":"11:49","startHours":10.810703942462897,"endHours":11.810703942462897,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:49","end":"12:49","startHours":11.810703942462897,"endHours":12.810703942462897,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:49","end":"13:49","startHours":12.810703942462897,"endHours":13.810703942462897,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:49","end":"14:49","startHours":13.810703942462897,"endHours":14.810703942462897,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:49","end":"15:49","startHours":14.810703942462897,"endHours":15.810703942462897,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:49","end":"16:49","startHours":15.810703942462897,"endHours":16.810703942462897,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:49","end":"17:49","startHours":16.810703942462897,"endHours":17.810703942462897,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:49","end":"18:49","startHours":17.810703942462897,"endHours":18.810703942462897,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:49","end":"19:49","startHours":18.810703942462897,"endHours":19.810703942462897,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:49","end":"20:49","startHours":19.810703942462897,"endHours":20.810703942462897,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:49","end":"21:49","startHours":20.810703942462897,"endHours":21.810703942462897,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:49","end":"22:49","startHours":21.810703942462897,"endHours":22.810703942462897,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:49","end":"23:49","startHours":22.810703942462897,"endHours":23.810703942462897,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:49","end":"00:49","startHours":23.810703942462897,"endHours":24.810703942462897,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:49","end":"01:49","startHours":24.810703942462897,"endHours":25.810703942462897,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:49","end":"02:49","startHours":25.810703942462897,"endHours":26.810703942462897,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:49","end":"03:49","startHours":26.810703942462897,"endHours":27.810703942462897,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:49","end":"04:49","startHours":27.810703942462897,"endHours":28.810703942462897,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:49","end":"05:49","startHours":28.810703942462897,"endHours":29.810703942462897,"planetary_lord":"Mercury"}],"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":"East","anandadiYoga":{"name":"Dhūmra","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":10.262195603027843,"eotMinutes":0.2640489797298191,"ayanamsa":22.977}},"calendars":{"vikram_samvat":1994,"vikram_samvatsara":"Vikṛti","saka_samvat":1859,"saka_samvatsara":"Īśvara","bengali_samvat":1344,"malayalam_era":1113,"nanakshahi_year":468,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","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":"Caitra Śukla Saptamī · Vikram 1994 Vikṛti · Śaka 1859 Īśvara"},"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":[{"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 April 17, 1937 CE · Ṛṣikeśa · Vidhyamitra","description":"April 17, 1937 CE for Ṛṣikeśa: Śukla Saptamī, sūryodaya 05:49, sūryāsta 18:45.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1937-04-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1937-04-17","sa":"https://sa.vidhyamitra.com/city/rishikesh/1937-04-17","hi":"https://hi.vidhyamitra.com/city/rishikesh/1937-04-17","x-default":"https://vidhyamitra.com/city/rishikesh/1937-04-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T08:21:40.861Z","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":"2026-06-02T08:21:40.861Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T08:21:40.861Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}