{"id":"vidhyamitra:city-day:rishikesh:1931-08-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1931-08-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1931-08-17","date_display":"August 17, 1931 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":1931,"month":8,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2426570.770833,"kali_year":5033,"ahargana":1838105.2708,"sun":{"sidereal_longitude":119.8234,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":161.4681,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":41.6447,"elapsed_within_tithi_degrees":5.6447},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":161.4681,"elapsed_within_degrees":1.4681},"yoga":{"number":22,"name":"Sādhya","sum_longitude":281.2915},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"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":1931,"month":8,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2426570.770833,"ahargana":1838105.2708,"kali_year":5033,"ayanamsa_lahiri":22.8978,"grahas":{"sun":{"sidereal_longitude":120.28120999999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":164.64540999999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false,"latitude":0.5377},"mars":{"sidereal_longitude":167.63101000000006,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":146.63241,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":104.48921000000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"venus":{"sidereal_longitude":115.22251,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":265.18411000000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":348.3372,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":168.3372,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","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":1931,"month":8,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2426570.770833,"kali_year":5033,"ahargana":1838105.2708,"sun":{"sidereal_longitude":119.8234,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":161.4681,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":41.6447,"elapsed_within_tithi_degrees":5.6447},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":161.4681,"elapsed_within_degrees":1.4681},"yoga":{"number":22,"name":"Sādhya","sum_longitude":281.2915},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.538,"elongation":41.645},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.538,"opposition_distance":138.355}},"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":"05:44","sunsetLocal":"18:57","solarNoonLocal":"12:21","dayLengthHours":13.22374563290957,"dayLengthDisplay":"13 Hours 13 Mins 25 Secs","nightLengthDisplay":"10 Hours 46 Mins 35 Secs","moonriseLocal":"09:22","moonsetLocal":"21:14","rahuKala":{"name":"Rāhu Kāla","start":"07:23","end":"09:02","startHours":7.385815080227544,"endHours":9.038783284341239,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:42","end":"12:21","startHours":10.691751488454937,"endHours":12.344719692568631,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:00","end":"15:39","startHours":13.99768789668233,"endHours":15.650656100796024,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:49","end":"09:16","startHours":8.818387523792747,"endHours":9.259179044889732,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:17","end":"06:38","startHours":6.283836277485079,"endHours":6.636469494362668,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:47","startHours":11.903928171471646,"endHours":12.785511213665616,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:58","end":"04:51","startHours":3.9696807917259047,"endHours":4.851263833919877,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:38","end":"05:44","startHours":4.630868073371383,"endHours":5.732846876113848,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:33","end":"15:26","startHours":14.548677298053562,"endHours":15.430260340247534,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:45","end":"19:09","startHours":18.756592509023417,"endHours":19.156592509023415,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:57","end":"19:30","startHours":18.956592509023416,"endHours":19.50758191039465,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:42","end":"20:27","startHours":18.706592509023416,"endHours":20.456592509023416,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:47","startHours":23.903928171471645,"endHours":24.785511213665618,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:44","end":"07:23","startHours":5.732846876113848,"endHours":7.385815080227544,"quality":"auspicious"},{"name":"Kāla","start":"07:23","end":"09:02","startHours":7.385815080227544,"endHours":9.038783284341239,"quality":"inauspicious"},{"name":"Śubha","start":"09:02","end":"10:42","startHours":9.038783284341239,"endHours":10.691751488454937,"quality":"auspicious"},{"name":"Roga","start":"10:42","end":"12:21","startHours":10.691751488454937,"endHours":12.344719692568631,"quality":"inauspicious"},{"name":"Udveg","start":"12:21","end":"14:00","startHours":12.344719692568631,"endHours":13.99768789668233,"quality":"inauspicious"},{"name":"Chala","start":"14:00","end":"15:39","startHours":13.99768789668233,"endHours":15.650656100796024,"quality":"neutral"},{"name":"Labha","start":"15:39","end":"17:18","startHours":15.650656100796024,"endHours":17.30362430490972,"quality":"auspicious"},{"name":"Amṛta","start":"17:18","end":"18:57","startHours":17.30362430490972,"endHours":18.956592509023416,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:57","end":"20:18","startHours":18.956592509023416,"endHours":20.303624304909718,"quality":"neutral"},{"name":"Labha","start":"20:18","end":"21:39","startHours":20.303624304909718,"endHours":21.650656100796024,"quality":"auspicious"},{"name":"Amṛta","start":"21:39","end":"23:00","startHours":21.650656100796024,"endHours":22.99768789668233,"quality":"auspicious"},{"name":"Kāla","start":"23:00","end":"00:21","startHours":22.99768789668233,"endHours":24.34471969256863,"quality":"inauspicious"},{"name":"Śubha","start":"00:21","end":"01:42","startHours":24.34471969256863,"endHours":25.691751488454933,"quality":"auspicious"},{"name":"Roga","start":"01:42","end":"03:02","startHours":25.691751488454933,"endHours":27.03878328434124,"quality":"inauspicious"},{"name":"Udveg","start":"03:02","end":"04:23","startHours":27.03878328434124,"endHours":28.385815080227545,"quality":"inauspicious"},{"name":"Chala","start":"04:23","end":"05:44","startHours":28.385815080227545,"endHours":29.732846876113847,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:44","end":"06:44","startHours":5.732846876113848,"endHours":6.732846876113848,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:44","end":"07:44","startHours":6.732846876113848,"endHours":7.732846876113848,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:44","end":"08:44","startHours":7.732846876113848,"endHours":8.732846876113847,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:44","end":"09:44","startHours":8.732846876113847,"endHours":9.732846876113847,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:44","end":"10:44","startHours":9.732846876113847,"endHours":10.732846876113847,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:44","end":"11:44","startHours":10.732846876113847,"endHours":11.732846876113847,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:44","end":"12:44","startHours":11.732846876113847,"endHours":12.732846876113847,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:44","end":"13:44","startHours":12.732846876113847,"endHours":13.732846876113847,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:44","end":"14:44","startHours":13.732846876113847,"endHours":14.732846876113847,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:44","end":"15:44","startHours":14.732846876113847,"endHours":15.732846876113847,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:44","end":"16:44","startHours":15.732846876113847,"endHours":16.732846876113847,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:44","end":"17:44","startHours":16.732846876113847,"endHours":17.732846876113847,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:44","end":"18:44","startHours":17.732846876113847,"endHours":18.732846876113847,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:44","end":"19:44","startHours":18.732846876113847,"endHours":19.732846876113847,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:44","end":"20:44","startHours":19.732846876113847,"endHours":20.732846876113847,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:44","end":"21:44","startHours":20.732846876113847,"endHours":21.732846876113847,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:44","end":"22:44","startHours":21.732846876113847,"endHours":22.732846876113847,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:44","end":"23:44","startHours":22.732846876113847,"endHours":23.732846876113847,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:44","end":"00:44","startHours":23.732846876113847,"endHours":24.732846876113847,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:44","end":"01:44","startHours":24.732846876113847,"endHours":25.732846876113847,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:44","end":"02:44","startHours":25.732846876113847,"endHours":26.732846876113847,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:44","end":"03:44","startHours":26.732846876113847,"endHours":27.732846876113847,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:44","end":"04:44","startHours":27.732846876113847,"endHours":28.732846876113847,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:44","end":"05:44","startHours":28.732846876113847,"endHours":29.732846876113847,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-West","rahuVasa":"North-East","anandadiYoga":{"name":"Mṛtyu","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":13.790225801651786,"eotMinutes":-3.7535815541179196,"ayanamsa":22.8978}},"calendars":{"vikram_samvat":1988,"vikram_samvatsara":"Tāraṇa","saka_samvat":1853,"saka_samvatsara":"Prajāpati","bengali_samvat":1338,"malayalam_era":1107,"nanakshahi_year":462,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Śrāvaṇa","lunar_month_amanta":"Śrāvaṇa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Caturthī · Vikram 1988 Tāraṇa · Śaka 1853 Prajāpati"},"festivals":[{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi_ingress":"Siṃha"},"precedence":5},{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"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 August 17, 1931 CE · Ṛṣikeśa · Vidhyamitra","description":"August 17, 1931 CE for Ṛṣikeśa: Śukla Caturthī, sūryodaya 05:44, sūryāsta 18:57.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1931-08-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1931-08-17","sa":"https://sa.vidhyamitra.com/city/rishikesh/1931-08-17","hi":"https://hi.vidhyamitra.com/city/rishikesh/1931-08-17","x-default":"https://vidhyamitra.com/city/rishikesh/1931-08-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-30T23:41:05.816Z","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":"2026-05-30T23:41:05.816Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-30T23:41:05.816Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}