{"id":"vidhyamitra:city-day:rishikesh:1931-08-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1931-08-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1931-08-15","date_display":"August 15, 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":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2426568.770833,"kali_year":5033,"ahargana":1838103.2708,"sun":{"sidereal_longitude":117.9111,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":132.4844,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":14.5734,"elapsed_within_tithi_degrees":2.5734},"nakshatra":{"number":10,"name":"Maghā","pada":4,"moon_longitude":132.4844,"elapsed_within_degrees":12.4844},"yoga":{"number":19,"name":"Parigha","sum_longitude":250.3955},"karana":{"half_tithi_index":2,"name":"Bālava"},"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":1931,"month":8,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2426568.770833,"ahargana":1838103.2708,"kali_year":5033,"ayanamsa_lahiri":22.8978,"grahas":{"sun":{"sidereal_longitude":118.35898600000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":134.837286,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false,"latitude":2.6406},"mars":{"sidereal_longitude":166.36708599999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":145.584386,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":104.055386,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"venus":{"sidereal_longitude":112.75338599999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":265.29198599999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":348.4431,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":168.4431,"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":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2426568.770833,"kali_year":5033,"ahargana":1838103.2708,"sun":{"sidereal_longitude":117.9111,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":132.4844,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":14.5734,"elapsed_within_tithi_degrees":2.5734},"nakshatra":{"number":10,"name":"Maghā","pada":4,"moon_longitude":132.4844,"elapsed_within_degrees":12.4844},"yoga":{"number":19,"name":"Parigha","sum_longitude":250.3955},"karana":{"half_tithi_index":2,"name":"Bālava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.641,"elongation":14.573},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.641,"opposition_distance":165.427}},"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":"05:43","sunsetLocal":"18:59","solarNoonLocal":"12:21","dayLengthHours":13.275968542849519,"dayLengthDisplay":"13 Hours 16 Mins 33 Secs","nightLengthDisplay":"10 Hours 43 Mins 27 Secs","moonriseLocal":"07:04","moonsetLocal":"19:50","rahuKala":{"name":"Rāhu Kāla","start":"09:02","end":"10:42","startHours":9.032779659731428,"endHours":10.692275727587619,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:01","end":"15:40","startHours":14.011267863299999,"endHours":15.670763931156188,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:43","end":"07:22","startHours":5.713787524019049,"endHours":7.373283591875239,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:49","end":"09:15","startHours":8.811513517350605,"endHours":9.254045802112255,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:16","end":"06:37","startHours":6.266952879971113,"endHours":6.620978707780433,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:48","startHours":11.90923951068216,"endHours":12.79430408020546,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:57","end":"04:50","startHours":3.943658384972447,"endHours":4.828722954495748,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:36","end":"05:43","startHours":4.607456812114923,"endHours":5.713787524019049,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:34","end":"15:27","startHours":14.564433219252063,"endHours":15.449497788775364,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:47","end":"19:11","startHours":18.78975606686857,"endHours":19.18975606686857,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:59","end":"19:33","startHours":18.98975606686857,"endHours":19.542921422820633,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:44","end":"20:29","startHours":18.73975606686857,"endHours":20.48975606686857,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:48","startHours":23.90923951068216,"endHours":24.79430408020546,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:43","end":"07:22","startHours":5.713787524019049,"endHours":7.373283591875239,"quality":"inauspicious"},{"name":"Śubha","start":"07:22","end":"09:02","startHours":7.373283591875239,"endHours":9.032779659731428,"quality":"auspicious"},{"name":"Roga","start":"09:02","end":"10:42","startHours":9.032779659731428,"endHours":10.692275727587619,"quality":"inauspicious"},{"name":"Udveg","start":"10:42","end":"12:21","startHours":10.692275727587619,"endHours":12.35177179544381,"quality":"inauspicious"},{"name":"Chala","start":"12:21","end":"14:01","startHours":12.35177179544381,"endHours":14.011267863299999,"quality":"neutral"},{"name":"Labha","start":"14:01","end":"15:40","startHours":14.011267863299999,"endHours":15.670763931156188,"quality":"auspicious"},{"name":"Amṛta","start":"15:40","end":"17:20","startHours":15.670763931156188,"endHours":17.33025999901238,"quality":"auspicious"},{"name":"Kāla","start":"17:20","end":"18:59","startHours":17.33025999901238,"endHours":18.98975606686857,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:59","end":"20:20","startHours":18.98975606686857,"endHours":20.33025999901238,"quality":"auspicious"},{"name":"Amṛta","start":"20:20","end":"21:40","startHours":20.33025999901238,"endHours":21.670763931156188,"quality":"auspicious"},{"name":"Kāla","start":"21:40","end":"23:01","startHours":21.670763931156188,"endHours":23.0112678633,"quality":"inauspicious"},{"name":"Śubha","start":"23:01","end":"00:21","startHours":23.0112678633,"endHours":24.35177179544381,"quality":"auspicious"},{"name":"Roga","start":"00:21","end":"01:42","startHours":24.35177179544381,"endHours":25.69227572758762,"quality":"inauspicious"},{"name":"Udveg","start":"01:42","end":"03:02","startHours":25.69227572758762,"endHours":27.032779659731432,"quality":"inauspicious"},{"name":"Chala","start":"03:02","end":"04:22","startHours":27.032779659731432,"endHours":28.37328359187524,"quality":"neutral"},{"name":"Labha","start":"04:22","end":"05:43","startHours":28.37328359187524,"endHours":29.71378752401905,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:43","end":"06:43","startHours":5.713787524019049,"endHours":6.713787524019049,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:43","end":"07:43","startHours":6.713787524019049,"endHours":7.713787524019049,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:43","end":"08:43","startHours":7.713787524019049,"endHours":8.71378752401905,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:43","end":"09:43","startHours":8.71378752401905,"endHours":9.71378752401905,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:43","end":"10:43","startHours":9.71378752401905,"endHours":10.71378752401905,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:43","end":"11:43","startHours":10.71378752401905,"endHours":11.71378752401905,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:43","end":"12:43","startHours":11.71378752401905,"endHours":12.71378752401905,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:43","end":"13:43","startHours":12.71378752401905,"endHours":13.71378752401905,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:43","end":"14:43","startHours":13.71378752401905,"endHours":14.71378752401905,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:43","end":"15:43","startHours":14.71378752401905,"endHours":15.71378752401905,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:43","end":"16:43","startHours":15.71378752401905,"endHours":16.71378752401905,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:43","end":"17:43","startHours":16.71378752401905,"endHours":17.71378752401905,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:43","end":"18:43","startHours":17.71378752401905,"endHours":18.71378752401905,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:43","end":"19:43","startHours":18.71378752401905,"endHours":19.71378752401905,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:43","end":"20:43","startHours":19.71378752401905,"endHours":20.71378752401905,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:43","end":"21:43","startHours":20.71378752401905,"endHours":21.71378752401905,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:43","end":"22:43","startHours":21.71378752401905,"endHours":22.71378752401905,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:43","end":"23:43","startHours":22.71378752401905,"endHours":23.71378752401905,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:43","end":"00:43","startHours":23.71378752401905,"endHours":24.71378752401905,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:43","end":"01:43","startHours":24.71378752401905,"endHours":25.71378752401905,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:43","end":"02:43","startHours":25.71378752401905,"endHours":26.71378752401905,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:43","end":"03:43","startHours":26.71378752401905,"endHours":27.71378752401905,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:43","end":"04:43","startHours":27.71378752401905,"endHours":28.71378752401905,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:43","end":"05:43","startHours":28.71378752401905,"endHours":29.71378752401905,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"West","rahuVasa":"East","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Grīṣma (Summer)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":14.413218782261119,"eotMinutes":-4.176707726628523,"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":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Dvitīyā · Vikram 1988 Tāraṇa · Śaka 1853 Prajāpati"},"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 August 15, 1931 CE · Ṛṣikeśa · Vidhyamitra","description":"August 15, 1931 CE for Ṛṣikeśa: Śukla Dvitīyā, sūryodaya 05:43, sūryāsta 18:59.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1931-08-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1931-08-15","sa":"https://sa.vidhyamitra.com/city/rishikesh/1931-08-15","hi":"https://hi.vidhyamitra.com/city/rishikesh/1931-08-15","x-default":"https://vidhyamitra.com/city/rishikesh/1931-08-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T22:47:47.241Z","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":"2026-05-31T22:47:47.241Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T22:47:47.241Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}