{"id":"vidhyamitra:city-day:vrindavan:1980-08-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/vrindavan/1980-08-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-08-17","date_display":"August 17, 1980 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":1980,"month":8,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444468.770833,"kali_year":5082,"ahargana":1856003.2708,"sun":{"sidereal_longitude":120.1304,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":192.6848,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":72.5544,"elapsed_within_tithi_degrees":0.5544},"nakshatra":{"number":15,"name":"Svātī","pada":2,"moon_longitude":192.6848,"elapsed_within_degrees":6.0181},"yoga":{"number":24,"name":"Śukla","sum_longitude":312.8152},"karana":{"half_tithi_index":12,"name":"Gara"},"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":1980,"month":8,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444468.770833,"ahargana":1856003.2708,"kali_year":5082,"ayanamsa_lahiri":23.5824,"grahas":{"sun":{"sidereal_longitude":120.70847399999997,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":189.65767400000004,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false,"latitude":4.2953},"mars":{"sidereal_longitude":178.909174,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":111.21367399999997,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":141.27677400000005,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"venus":{"sidereal_longitude":75.36297400000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":151.91227400000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":120.015,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":300.015,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","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":1980,"month":8,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444468.770833,"kali_year":5082,"ahargana":1856003.2708,"sun":{"sidereal_longitude":120.1304,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":192.6848,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":72.5544,"elapsed_within_tithi_degrees":0.5544},"nakshatra":{"number":15,"name":"Svātī","pada":2,"moon_longitude":192.6848,"elapsed_within_degrees":6.0181},"yoga":{"number":24,"name":"Śukla","sum_longitude":312.8152},"karana":{"half_tithi_index":12,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.295,"elongation":72.554},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.295,"opposition_distance":107.446}},"eclipse_window_40days":[{"offset_days":-20,"type":"lunar","occurs":true,"moon_latitude":1.393,"opposition_distance":1.959},{"offset_days":9,"type":"lunar","occurs":true,"moon_latitude":-0.515,"opposition_distance":2.645}]},"city":{"slug":"vrindavan","name":"Vṛndāvana","lat":27.565,"lon":77.6593,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"vrindavan","name":"Vṛndāvana","lat":27.565,"lon":77.6593,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"05:51","sunsetLocal":"18:56","solarNoonLocal":"12:23","dayLengthHours":13.084200749689337,"dayLengthDisplay":"13 Hours 05 Mins 03 Secs","nightLengthDisplay":"10 Hours 54 Mins 57 Secs","moonriseLocal":"11:23","moonsetLocal":"22:35","rahuKala":{"name":"Rāhu Kāla","start":"17:18","end":"18:56","startHours":17.29184830703547,"endHours":18.927373400746635,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:23","end":"14:01","startHours":12.385273025901967,"endHours":14.020798119613133,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:39","end":"17:18","startHours":15.656323213324299,"endHours":17.29184830703547,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:54","end":"09:20","startHours":8.89615282598481,"endHours":9.332292850974454,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:23","end":"06:44","startHours":6.388347682294353,"endHours":6.737259702286069,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:57","end":"12:49","startHours":11.949133000912322,"endHours":12.82141305089161,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:06","end":"04:58","startHours":4.098612551098719,"endHours":4.970892601078008,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:45","end":"05:51","startHours":4.752822588583186,"endHours":5.843172651057297,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:34","end":"15:26","startHours":14.56597315085019,"endHours":15.43825320082948,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:44","end":"19:08","startHours":18.727373400746636,"endHours":19.127373400746635,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:56","end":"19:28","startHours":18.927373400746635,"endHours":19.47254843198369,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:41","end":"20:26","startHours":18.677373400746635,"endHours":20.427373400746635,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:57","end":"00:49","startHours":23.949133000912322,"endHours":24.82141305089161,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:51","end":"07:29","startHours":5.843172651057297,"endHours":7.478697744768464,"quality":"inauspicious"},{"name":"Chala","start":"07:29","end":"09:07","startHours":7.478697744768464,"endHours":9.11422283847963,"quality":"neutral"},{"name":"Labha","start":"09:07","end":"10:45","startHours":9.11422283847963,"endHours":10.749747932190798,"quality":"auspicious"},{"name":"Amṛta","start":"10:45","end":"12:23","startHours":10.749747932190798,"endHours":12.385273025901967,"quality":"auspicious"},{"name":"Kāla","start":"12:23","end":"14:01","startHours":12.385273025901967,"endHours":14.020798119613133,"quality":"inauspicious"},{"name":"Śubha","start":"14:01","end":"15:39","startHours":14.020798119613133,"endHours":15.656323213324299,"quality":"auspicious"},{"name":"Roga","start":"15:39","end":"17:18","startHours":15.656323213324299,"endHours":17.29184830703547,"quality":"inauspicious"},{"name":"Udveg","start":"17:18","end":"18:56","startHours":17.29184830703547,"endHours":18.927373400746635,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:56","end":"20:18","startHours":18.927373400746635,"endHours":20.29184830703547,"quality":"auspicious"},{"name":"Roga","start":"20:18","end":"21:39","startHours":20.29184830703547,"endHours":21.6563232133243,"quality":"inauspicious"},{"name":"Udveg","start":"21:39","end":"23:01","startHours":21.6563232133243,"endHours":23.020798119613133,"quality":"inauspicious"},{"name":"Chala","start":"23:01","end":"00:23","startHours":23.020798119613133,"endHours":24.385273025901967,"quality":"neutral"},{"name":"Labha","start":"00:23","end":"01:45","startHours":24.385273025901967,"endHours":25.7497479321908,"quality":"auspicious"},{"name":"Amṛta","start":"01:45","end":"03:07","startHours":25.7497479321908,"endHours":27.114222838479634,"quality":"auspicious"},{"name":"Kāla","start":"03:07","end":"04:29","startHours":27.114222838479634,"endHours":28.478697744768464,"quality":"inauspicious"},{"name":"Śubha","start":"04:29","end":"05:51","startHours":28.478697744768464,"endHours":29.843172651057298,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:51","end":"06:51","startHours":5.843172651057297,"endHours":6.843172651057297,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:51","end":"07:51","startHours":6.843172651057297,"endHours":7.843172651057297,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:51","end":"08:51","startHours":7.843172651057297,"endHours":8.843172651057298,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:51","end":"09:51","startHours":8.843172651057298,"endHours":9.843172651057298,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:51","end":"10:51","startHours":9.843172651057298,"endHours":10.843172651057298,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:51","end":"11:51","startHours":10.843172651057298,"endHours":11.843172651057298,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:51","end":"12:51","startHours":11.843172651057298,"endHours":12.843172651057298,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:51","end":"13:51","startHours":12.843172651057298,"endHours":13.843172651057298,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:51","end":"14:51","startHours":13.843172651057298,"endHours":14.843172651057298,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:51","end":"15:51","startHours":14.843172651057298,"endHours":15.843172651057298,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:51","end":"16:51","startHours":15.843172651057298,"endHours":16.843172651057298,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:51","end":"17:51","startHours":16.843172651057298,"endHours":17.843172651057298,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:51","end":"18:51","startHours":17.843172651057298,"endHours":18.843172651057298,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:51","end":"19:51","startHours":18.843172651057298,"endHours":19.843172651057298,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:51","end":"20:51","startHours":19.843172651057298,"endHours":20.843172651057298,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:51","end":"21:51","startHours":20.843172651057298,"endHours":21.843172651057298,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:51","end":"22:51","startHours":21.843172651057298,"endHours":22.843172651057298,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:51","end":"23:51","startHours":22.843172651057298,"endHours":23.843172651057298,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:51","end":"00:51","startHours":23.843172651057298,"endHours":24.843172651057298,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:51","end":"01:51","startHours":24.843172651057298,"endHours":25.843172651057298,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:51","end":"02:51","startHours":25.843172651057298,"endHours":26.843172651057298,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:51","end":"03:51","startHours":26.843172651057298,"endHours":27.843172651057298,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:51","end":"04:51","startHours":27.843172651057298,"endHours":28.843172651057298,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:51","end":"05:51","startHours":28.843172651057298,"endHours":29.843172651057298,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"North","rahuVasa":"North-East","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"tropicalRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":13.423373629467523,"eotMinutes":-3.7535815541179196,"ayanamsa":23.5824}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"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 Saptamī · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"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}],"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":"vrindavan"},"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, 1980 CE · Vṛndāvana · Vidhyamitra","description":"August 17, 1980 CE for Vṛndāvana: Śukla Saptamī, sūryodaya 05:51, sūryāsta 18:56.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/vrindavan/1980-08-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/vrindavan/1980-08-17","sa":"https://sa.vidhyamitra.com/city/vrindavan/1980-08-17","hi":"https://hi.vidhyamitra.com/city/vrindavan/1980-08-17","x-default":"https://vidhyamitra.com/city/vrindavan/1980-08-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T11:57:11.625Z","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":"2026-06-02T11:57:11.625Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T11:57:11.625Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}