{"id":"vidhyamitra:city-day:rishikesh:1979-08-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1979-08-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1979-08-31","date_display":"August 31, 1979 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":1979,"month":8,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444116.770833,"kali_year":5081,"ahargana":1855651.2708,"sun":{"sidereal_longitude":132.857,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":230.2219,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":97.3649,"elapsed_within_tithi_degrees":1.3649},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2,"moon_longitude":230.2219,"elapsed_within_degrees":3.5552},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":3.0789},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":1979,"month":8,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444116.770833,"ahargana":1855651.2708,"kali_year":5081,"ayanamsa_lahiri":23.5689,"grahas":{"sun":{"sidereal_longitude":133.48972300000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":226.95122300000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false,"latitude":4.4983},"mars":{"sidereal_longitude":81.340623,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":121.35682300000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":120.07732299999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":135.306823,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":142.15122299999996,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":138.6657,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":318.6657,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"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":1979,"month":8,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444116.770833,"kali_year":5081,"ahargana":1855651.2708,"sun":{"sidereal_longitude":132.857,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":230.2219,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":97.3649,"elapsed_within_tithi_degrees":1.3649},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2,"moon_longitude":230.2219,"elapsed_within_degrees":3.5552},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":3.0789},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.498,"elongation":97.365},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.498,"opposition_distance":82.635}},"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":"05:52","sunsetLocal":"18:42","solarNoonLocal":"12:17","dayLengthHours":12.826119848753976,"dayLengthDisplay":"12 Hours 49 Mins 34 Secs","nightLengthDisplay":"11 Hours 10 Mins 26 Secs","moonriseLocal":"13:22","moonsetLocal":"23:39","rahuKala":{"name":"Rāhu Kāla","start":"10:41","end":"12:17","startHours":10.676468526849298,"endHours":12.279733507943543,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:29","end":"17:05","startHours":15.486263470132037,"endHours":17.089528451226286,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:28","end":"09:04","startHours":7.469938564660803,"endHours":9.07320354575505,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:52","end":"09:17","startHours":8.85943488160915,"endHours":9.28697220990095,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:24","end":"06:45","startHours":6.401095243931305,"endHours":6.743125106564745,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:51","end":"12:42","startHours":11.852196179651743,"endHours":12.707270836235343,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:09","end":"05:01","startHours":4.15652427039936,"endHours":5.011598926982958,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:48","end":"05:52","startHours":4.797830262837058,"endHours":5.866673583566556,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:25","end":"15:16","startHours":14.417420149402542,"endHours":15.27249480598614,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:30","end":"18:54","startHours":18.492793432320532,"endHours":18.89279343232053,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:42","end":"19:14","startHours":18.69279343232053,"endHours":19.22721509268528,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:27","end":"20:12","startHours":18.44279343232053,"endHours":20.19279343232053,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:51","end":"00:42","startHours":23.852196179651745,"endHours":24.70727083623534,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"05:52","end":"07:28","startHours":5.866673583566556,"endHours":7.469938564660803,"quality":"neutral"},{"name":"Labha","start":"07:28","end":"09:04","startHours":7.469938564660803,"endHours":9.07320354575505,"quality":"auspicious"},{"name":"Amṛta","start":"09:04","end":"10:41","startHours":9.07320354575505,"endHours":10.676468526849298,"quality":"auspicious"},{"name":"Kāla","start":"10:41","end":"12:17","startHours":10.676468526849298,"endHours":12.279733507943543,"quality":"inauspicious"},{"name":"Śubha","start":"12:17","end":"13:53","startHours":12.279733507943543,"endHours":13.882998489037792,"quality":"auspicious"},{"name":"Roga","start":"13:53","end":"15:29","startHours":13.882998489037792,"endHours":15.486263470132037,"quality":"inauspicious"},{"name":"Udveg","start":"15:29","end":"17:05","startHours":15.486263470132037,"endHours":17.089528451226286,"quality":"inauspicious"},{"name":"Chala","start":"17:05","end":"18:42","startHours":17.089528451226286,"endHours":18.69279343232053,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:42","end":"20:05","startHours":18.69279343232053,"endHours":20.089528451226286,"quality":"inauspicious"},{"name":"Udveg","start":"20:05","end":"21:29","startHours":20.089528451226286,"endHours":21.486263470132037,"quality":"inauspicious"},{"name":"Chala","start":"21:29","end":"22:53","startHours":21.486263470132037,"endHours":22.88299848903779,"quality":"neutral"},{"name":"Labha","start":"22:53","end":"00:17","startHours":22.88299848903779,"endHours":24.279733507943543,"quality":"auspicious"},{"name":"Amṛta","start":"00:17","end":"01:41","startHours":24.279733507943543,"endHours":25.6764685268493,"quality":"auspicious"},{"name":"Kāla","start":"01:41","end":"03:04","startHours":25.6764685268493,"endHours":27.07320354575505,"quality":"inauspicious"},{"name":"Śubha","start":"03:04","end":"04:28","startHours":27.07320354575505,"endHours":28.4699385646608,"quality":"auspicious"},{"name":"Roga","start":"04:28","end":"05:52","startHours":28.4699385646608,"endHours":29.866673583566556,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:52","end":"06:52","startHours":5.866673583566556,"endHours":6.866673583566556,"planetary_lord":"Venus"},{"name":"Hora 2","start":"06:52","end":"07:52","startHours":6.866673583566556,"endHours":7.866673583566556,"planetary_lord":"Sun"},{"name":"Hora 3","start":"07:52","end":"08:52","startHours":7.866673583566556,"endHours":8.866673583566556,"planetary_lord":"Mars"},{"name":"Hora 4","start":"08:52","end":"09:52","startHours":8.866673583566556,"endHours":9.866673583566556,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"09:52","end":"10:52","startHours":9.866673583566556,"endHours":10.866673583566556,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"10:52","end":"11:52","startHours":10.866673583566556,"endHours":11.866673583566556,"planetary_lord":"Moon"},{"name":"Hora 7","start":"11:52","end":"12:52","startHours":11.866673583566556,"endHours":12.866673583566556,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"12:52","end":"13:52","startHours":12.866673583566556,"endHours":13.866673583566556,"planetary_lord":"Venus"},{"name":"Hora 9","start":"13:52","end":"14:52","startHours":13.866673583566556,"endHours":14.866673583566556,"planetary_lord":"Sun"},{"name":"Hora 10","start":"14:52","end":"15:52","startHours":14.866673583566556,"endHours":15.866673583566556,"planetary_lord":"Mars"},{"name":"Hora 11","start":"15:52","end":"16:52","startHours":15.866673583566556,"endHours":16.866673583566556,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"16:52","end":"17:52","startHours":16.866673583566556,"endHours":17.866673583566556,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"17:52","end":"18:52","startHours":17.866673583566556,"endHours":18.866673583566556,"planetary_lord":"Moon"},{"name":"Hora 14","start":"18:52","end":"19:52","startHours":18.866673583566556,"endHours":19.866673583566556,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"19:52","end":"20:52","startHours":19.866673583566556,"endHours":20.866673583566556,"planetary_lord":"Venus"},{"name":"Hora 16","start":"20:52","end":"21:52","startHours":20.866673583566556,"endHours":21.866673583566556,"planetary_lord":"Sun"},{"name":"Hora 17","start":"21:52","end":"22:52","startHours":21.866673583566556,"endHours":22.866673583566556,"planetary_lord":"Mars"},{"name":"Hora 18","start":"22:52","end":"23:52","startHours":22.866673583566556,"endHours":23.866673583566556,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"23:52","end":"00:52","startHours":23.866673583566556,"endHours":24.866673583566556,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"00:52","end":"01:52","startHours":24.866673583566556,"endHours":25.866673583566556,"planetary_lord":"Moon"},{"name":"Hora 21","start":"01:52","end":"02:52","startHours":25.866673583566556,"endHours":26.866673583566556,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"02:52","end":"03:52","startHours":26.866673583566556,"endHours":27.866673583566556,"planetary_lord":"Venus"},{"name":"Hora 23","start":"03:52","end":"04:52","startHours":27.866673583566556,"endHours":28.866673583566556,"planetary_lord":"Sun"},{"name":"Hora 24","start":"04:52","end":"05:52","startHours":28.866673583566556,"endHours":29.866673583566556,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"North-East","rahuVasa":"South-East","anandadiYoga":{"name":"Mudgara","quality":"Inauspicious"},"drikRitu":"Varṣā (Monsoon) (Drik)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":8.918639197539505,"eotMinutes":0.14558952338733633,"ayanamsa":23.5689}},"calendars":{"vikram_samvat":2036,"vikram_samvatsara":"Aṅgirasa","saka_samvat":1901,"saka_samvatsara":"Siddhārthī","bengali_samvat":1386,"malayalam_era":1155,"nanakshahi_year":510,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Navamī · Vikram 2036 Aṅgirasa · Śaka 1901 Siddhārthī"},"festivals":[{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi":"Siṃha"},"precedence":5}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Jyeṣṭhā","url":"/day/-3137-10-20","relevance":0.5},{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","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 August 31, 1979 CE · Ṛṣikeśa · Vidhyamitra","description":"August 31, 1979 CE for Ṛṣikeśa: Śukla Navamī, sūryodaya 05:52, sūryāsta 18:42.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1979-08-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1979-08-31","sa":"https://sa.vidhyamitra.com/city/rishikesh/1979-08-31","hi":"https://hi.vidhyamitra.com/city/rishikesh/1979-08-31","x-default":"https://vidhyamitra.com/city/rishikesh/1979-08-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T15:17:20.693Z","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":"2026-05-18T15:17:20.693Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T15:17:20.693Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}