{"id":"vidhyamitra:city-day:rishikesh:1980-04-19:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1980-04-19","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-04-19","date_display":"April 19, 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":4,"day":19,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444348.770833,"kali_year":5082,"ahargana":1855883.2708,"sun":{"sidereal_longitude":5.7229,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":56.7659,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":5,"name":"Pañcamī","paksha":"Śukla","full_name":"Śukla Pañcamī","elongation_degrees":51.0429,"elapsed_within_tithi_degrees":3.0429},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":2,"moon_longitude":56.7659,"elapsed_within_degrees":3.4325},"yoga":{"number":5,"name":"Śobhana","sum_longitude":62.4888},"karana":{"half_tithi_index":8,"name":"Bava"},"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":1980,"month":4,"day":19,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444348.770833,"ahargana":1855883.2708,"kali_year":5082,"ayanamsa_lahiri":23.5778,"grahas":{"sun":{"sidereal_longitude":5.564559000000031,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":58.365058999999974,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false,"latitude":-4.2174},"mars":{"sidereal_longitude":123.51105899999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":true},"mercury":{"sidereal_longitude":343.139959,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":126.58795900000001,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":50.949059000000034,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":147.363159,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":126.3732,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":306.3732,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","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":1980,"month":4,"day":19,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444348.770833,"kali_year":5082,"ahargana":1855883.2708,"sun":{"sidereal_longitude":5.7229,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":56.7659,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":5,"name":"Pañcamī","paksha":"Śukla","full_name":"Śukla Pañcamī","elongation_degrees":51.0429,"elapsed_within_tithi_degrees":3.0429},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":2,"moon_longitude":56.7659,"elapsed_within_degrees":3.4325},"yoga":{"number":5,"name":"Śobhana","sum_longitude":62.4888},"karana":{"half_tithi_index":8,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.217,"elongation":51.043},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.217,"opposition_distance":128.957}},"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":"05:46","sunsetLocal":"18:46","solarNoonLocal":"12:16","dayLengthHours":13.007582967382731,"dayLengthDisplay":"13 Hours 00 Mins 27 Secs","nightLengthDisplay":"10 Hours 59 Mins 33 Secs","moonriseLocal":"08:47","moonsetLocal":"22:48","rahuKala":{"name":"Rāhu Kāla","start":"09:01","end":"10:39","startHours":9.017921984911176,"endHours":10.64386985583402,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:54","end":"15:31","startHours":13.895765597679702,"endHours":15.521713468602542,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:46","end":"07:24","startHours":5.766026243065494,"endHours":7.3919741139883355,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:48","end":"09:14","startHours":8.801128935454798,"endHours":9.234715034367555,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:18","end":"06:39","startHours":6.308008866706441,"endHours":6.6548777458366475,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:42","startHours":11.836231627844102,"endHours":12.703403825669616,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:02","end":"04:54","startHours":4.031681847414463,"endHours":4.898854045239979,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:41","end":"05:46","startHours":4.6820609957835995,"endHours":5.766026243065494,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:18","startHours":14.43774822132065,"endHours":15.304920419146166,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:34","end":"18:58","startHours":18.573609210448225,"endHours":18.973609210448224,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:46","end":"19:19","startHours":18.773609210448225,"endHours":19.315591834089172,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:31","end":"20:16","startHours":18.523609210448225,"endHours":20.273609210448225,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:42","startHours":23.8362316278441,"endHours":24.703403825669618,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:46","end":"07:24","startHours":5.766026243065494,"endHours":7.3919741139883355,"quality":"inauspicious"},{"name":"Śubha","start":"07:24","end":"09:01","startHours":7.3919741139883355,"endHours":9.017921984911176,"quality":"auspicious"},{"name":"Roga","start":"09:01","end":"10:39","startHours":9.017921984911176,"endHours":10.64386985583402,"quality":"inauspicious"},{"name":"Udveg","start":"10:39","end":"12:16","startHours":10.64386985583402,"endHours":12.269817726756859,"quality":"inauspicious"},{"name":"Chala","start":"12:16","end":"13:54","startHours":12.269817726756859,"endHours":13.895765597679702,"quality":"neutral"},{"name":"Labha","start":"13:54","end":"15:31","startHours":13.895765597679702,"endHours":15.521713468602542,"quality":"auspicious"},{"name":"Amṛta","start":"15:31","end":"17:09","startHours":15.521713468602542,"endHours":17.147661339525385,"quality":"auspicious"},{"name":"Kāla","start":"17:09","end":"18:46","startHours":17.147661339525385,"endHours":18.773609210448225,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:46","end":"20:09","startHours":18.773609210448225,"endHours":20.147661339525385,"quality":"auspicious"},{"name":"Amṛta","start":"20:09","end":"21:31","startHours":20.147661339525385,"endHours":21.52171346860254,"quality":"auspicious"},{"name":"Kāla","start":"21:31","end":"22:54","startHours":21.52171346860254,"endHours":22.8957655976797,"quality":"inauspicious"},{"name":"Śubha","start":"22:54","end":"00:16","startHours":22.8957655976797,"endHours":24.26981772675686,"quality":"auspicious"},{"name":"Roga","start":"00:16","end":"01:39","startHours":24.26981772675686,"endHours":25.64386985583402,"quality":"inauspicious"},{"name":"Udveg","start":"01:39","end":"03:01","startHours":25.64386985583402,"endHours":27.017921984911176,"quality":"inauspicious"},{"name":"Chala","start":"03:01","end":"04:24","startHours":27.017921984911176,"endHours":28.391974113988333,"quality":"neutral"},{"name":"Labha","start":"04:24","end":"05:46","startHours":28.391974113988333,"endHours":29.766026243065493,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:46","end":"06:46","startHours":5.766026243065494,"endHours":6.766026243065494,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:46","end":"07:46","startHours":6.766026243065494,"endHours":7.766026243065494,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:46","end":"08:46","startHours":7.766026243065494,"endHours":8.766026243065493,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:46","end":"09:46","startHours":8.766026243065493,"endHours":9.766026243065493,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:46","end":"10:46","startHours":9.766026243065493,"endHours":10.766026243065493,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:46","end":"11:46","startHours":10.766026243065493,"endHours":11.766026243065493,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:46","end":"12:46","startHours":11.766026243065493,"endHours":12.766026243065493,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:46","end":"13:46","startHours":12.766026243065493,"endHours":13.766026243065493,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:46","end":"14:46","startHours":13.766026243065493,"endHours":14.766026243065493,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:46","end":"15:46","startHours":14.766026243065493,"endHours":15.766026243065493,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:46","end":"16:46","startHours":15.766026243065493,"endHours":16.766026243065493,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:46","end":"17:46","startHours":16.766026243065493,"endHours":17.766026243065493,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:46","end":"18:46","startHours":17.766026243065493,"endHours":18.766026243065493,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:46","end":"19:46","startHours":18.766026243065493,"endHours":19.766026243065493,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:46","end":"20:46","startHours":19.766026243065493,"endHours":20.766026243065493,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:46","end":"21:46","startHours":20.766026243065493,"endHours":21.766026243065493,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:46","end":"22:46","startHours":21.766026243065493,"endHours":22.766026243065493,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:46","end":"23:46","startHours":22.766026243065493,"endHours":23.766026243065493,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:46","end":"00:46","startHours":23.766026243065493,"endHours":24.766026243065493,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:46","end":"01:46","startHours":24.766026243065493,"endHours":25.766026243065493,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:46","end":"02:46","startHours":25.766026243065493,"endHours":26.766026243065493,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:46","end":"03:46","startHours":26.766026243065493,"endHours":27.766026243065493,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:46","end":"04:46","startHours":27.766026243065493,"endHours":28.766026243065493,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:46","end":"05:46","startHours":28.766026243065493,"endHours":29.766026243065493,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"East","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":11.168104610007555,"eotMinutes":0.740536394588492,"ayanamsa":23.5778}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Pañcamī · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"festivals":[{"id":"shankara-jayanti","name":"Ādi Śaṅkarācārya Jayantī","name_sanskrit":"आदि शङ्कराचार्य जयन्ती","tradition":"Smarta","associated_deity":"Ādi Śaṅkarācārya","significance":"Birth of Ādi Śaṅkara at Kāladī, Kerala; Advaita-pratiṣṭhāpaka.","vrata":false,"detection":{"tithi_number":5,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":3}],"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 April 19, 1980 CE · Ṛṣikeśa · Vidhyamitra","description":"April 19, 1980 CE for Ṛṣikeśa: Śukla Pañcamī, sūryodaya 05:46, sūryāsta 18:46.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1980-04-19","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1980-04-19","sa":"https://sa.vidhyamitra.com/city/rishikesh/1980-04-19","hi":"https://hi.vidhyamitra.com/city/rishikesh/1980-04-19","x-default":"https://vidhyamitra.com/city/rishikesh/1980-04-19"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T18:43:50.330Z","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":"2026-05-31T18:43:50.330Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T18:43:50.330Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}