{"id":"vidhyamitra:city-day:rishikesh:1981-08-30:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1981-08-30","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-08-30","date_display":"August 30, 1981 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":1981,"month":8,"day":30,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444846.770833,"kali_year":5083,"ahargana":1856381.2708,"sun":{"sidereal_longitude":132.3586,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":139.6106,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.252,"elapsed_within_tithi_degrees":7.252},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":139.6106,"elapsed_within_degrees":6.2773},"yoga":{"number":21,"name":"Siddha","sum_longitude":271.9692},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":1981,"month":8,"day":30,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444846.770833,"ahargana":1856381.2708,"kali_year":5083,"ayanamsa_lahiri":23.5968,"grahas":{"sun":{"sidereal_longitude":132.99413200000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":138.14223200000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false,"latitude":2.8681},"mars":{"sidereal_longitude":94.71873199999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":150.45363199999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":168.00303200000008,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"venus":{"sidereal_longitude":170.290032,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":164.52803199999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":99.9867,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":279.9867,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":1981,"month":8,"day":30,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444846.770833,"kali_year":5083,"ahargana":1856381.2708,"sun":{"sidereal_longitude":132.3586,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":139.6106,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.252,"elapsed_within_tithi_degrees":7.252},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":139.6106,"elapsed_within_degrees":6.2773},"yoga":{"number":21,"name":"Siddha","sum_longitude":271.9692},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.868,"elongation":7.252},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.868,"opposition_distance":172.748}},"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":12.839975291188468,"dayLengthDisplay":"12 Hours 50 Mins 24 Secs","nightLengthDisplay":"11 Hours 09 Mins 36 Secs","moonriseLocal":"06:18","moonsetLocal":"18:57","rahuKala":{"name":"Rāhu Kāla","start":"17:06","end":"18:42","startHours":17.10013725650854,"endHours":18.705134167907097,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:17","end":"13:53","startHours":12.285146522312864,"endHours":13.890143433711422,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:30","end":"17:06","startHours":15.49514034510998,"endHours":17.10013725650854,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:52","end":"09:17","startHours":8.861153111329273,"endHours":9.28915228770222,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:24","end":"06:45","startHours":6.400157847184816,"endHours":6.7425571882831745,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:51","end":"12:43","startHours":11.857147345939914,"endHours":12.71314569868581,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:09","end":"05:01","startHours":4.153162171226834,"endHours":5.0091605239727315,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:48","end":"05:52","startHours":4.795160935786257,"endHours":5.865158876718629,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:17","startHours":14.425142404177608,"endHours":15.281140756923506,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:30","end":"18:54","startHours":18.505134167907098,"endHours":18.905134167907097,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:42","end":"19:14","startHours":18.705134167907097,"endHours":19.240133138373285,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:27","end":"20:12","startHours":18.455134167907097,"endHours":20.205134167907097,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:51","end":"00:43","startHours":23.857147345939914,"endHours":24.713145698685814,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:52","end":"07:28","startHours":5.865158876718629,"endHours":7.470155788117188,"quality":"inauspicious"},{"name":"Chala","start":"07:28","end":"09:05","startHours":7.470155788117188,"endHours":9.075152699515746,"quality":"neutral"},{"name":"Labha","start":"09:05","end":"10:41","startHours":9.075152699515746,"endHours":10.680149610914306,"quality":"auspicious"},{"name":"Amṛta","start":"10:41","end":"12:17","startHours":10.680149610914306,"endHours":12.285146522312864,"quality":"auspicious"},{"name":"Kāla","start":"12:17","end":"13:53","startHours":12.285146522312864,"endHours":13.890143433711422,"quality":"inauspicious"},{"name":"Śubha","start":"13:53","end":"15:30","startHours":13.890143433711422,"endHours":15.49514034510998,"quality":"auspicious"},{"name":"Roga","start":"15:30","end":"17:06","startHours":15.49514034510998,"endHours":17.10013725650854,"quality":"inauspicious"},{"name":"Udveg","start":"17:06","end":"18:42","startHours":17.10013725650854,"endHours":18.705134167907097,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:42","end":"20:06","startHours":18.705134167907097,"endHours":20.10013725650854,"quality":"auspicious"},{"name":"Roga","start":"20:06","end":"21:30","startHours":20.10013725650854,"endHours":21.49514034510998,"quality":"inauspicious"},{"name":"Udveg","start":"21:30","end":"22:53","startHours":21.49514034510998,"endHours":22.890143433711422,"quality":"inauspicious"},{"name":"Chala","start":"22:53","end":"00:17","startHours":22.890143433711422,"endHours":24.285146522312864,"quality":"neutral"},{"name":"Labha","start":"00:17","end":"01:41","startHours":24.285146522312864,"endHours":25.680149610914306,"quality":"auspicious"},{"name":"Amṛta","start":"01:41","end":"03:05","startHours":25.680149610914306,"endHours":27.075152699515748,"quality":"auspicious"},{"name":"Kāla","start":"03:05","end":"04:28","startHours":27.075152699515748,"endHours":28.47015578811719,"quality":"inauspicious"},{"name":"Śubha","start":"04:28","end":"05:52","startHours":28.47015578811719,"endHours":29.86515887671863,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:52","end":"06:52","startHours":5.865158876718629,"endHours":6.865158876718629,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:52","end":"07:52","startHours":6.865158876718629,"endHours":7.865158876718629,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:52","end":"08:52","startHours":7.865158876718629,"endHours":8.86515887671863,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:52","end":"09:52","startHours":8.86515887671863,"endHours":9.86515887671863,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:52","end":"10:52","startHours":9.86515887671863,"endHours":10.86515887671863,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:52","end":"11:52","startHours":10.86515887671863,"endHours":11.86515887671863,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:52","end":"12:52","startHours":11.86515887671863,"endHours":12.86515887671863,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:52","end":"13:52","startHours":12.86515887671863,"endHours":13.86515887671863,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:52","end":"14:52","startHours":13.86515887671863,"endHours":14.86515887671863,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:52","end":"15:52","startHours":14.86515887671863,"endHours":15.86515887671863,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:52","end":"16:52","startHours":15.86515887671863,"endHours":16.86515887671863,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:52","end":"17:52","startHours":16.86515887671863,"endHours":17.86515887671863,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:52","end":"18:52","startHours":17.86515887671863,"endHours":18.86515887671863,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:52","end":"19:52","startHours":18.86515887671863,"endHours":19.86515887671863,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:52","end":"20:52","startHours":19.86515887671863,"endHours":20.86515887671863,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:52","end":"21:52","startHours":20.86515887671863,"endHours":21.86515887671863,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:52","end":"22:52","startHours":21.86515887671863,"endHours":22.86515887671863,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:52","end":"23:52","startHours":22.86515887671863,"endHours":23.86515887671863,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:52","end":"00:52","startHours":23.86515887671863,"endHours":24.86515887671863,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:52","end":"01:52","startHours":24.86515887671863,"endHours":25.86515887671863,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:52","end":"02:52","startHours":25.86515887671863,"endHours":26.86515887671863,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:52","end":"03:52","startHours":26.86515887671863,"endHours":27.86515887671863,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:52","end":"04:52","startHours":27.86515887671863,"endHours":28.86515887671863,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:52","end":"05:52","startHours":28.86515887671863,"endHours":29.86515887671863,"planetary_lord":"Jupiter"}],"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","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"West","rahuVasa":"North-East","anandadiYoga":{"name":"Chatra","quality":"Auspicious"},"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":9.09177833503008,"eotMinutes":-0.17919133877174764,"ayanamsa":23.5968}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Pratipada · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"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":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — 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 30, 1981 CE · Ṛṣikeśa · Vidhyamitra","description":"August 30, 1981 CE for Ṛṣikeśa: Śukla Pratipada, sūryodaya 05:52, sūryāsta 18:42.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1981-08-30","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1981-08-30","sa":"https://sa.vidhyamitra.com/city/rishikesh/1981-08-30","hi":"https://hi.vidhyamitra.com/city/rishikesh/1981-08-30","x-default":"https://vidhyamitra.com/city/rishikesh/1981-08-30"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T22:12:00.046Z","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":"2026-05-18T22:12:00.046Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T22:12:00.046Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}