{"id":"vidhyamitra:city-day:rishikesh:1977-04-07:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1977-04-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1977-04-07","date_display":"April 7, 1977 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":1977,"month":4,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443240.770833,"kali_year":5078,"ahargana":1854775.2708,"sun":{"sidereal_longitude":353.784,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":210.8651,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":217.0811,"elapsed_within_tithi_degrees":1.0811},"nakshatra":{"number":16,"name":"Viśākhā","pada":4,"moon_longitude":210.8651,"elapsed_within_degrees":10.8651},"yoga":{"number":16,"name":"Siddhi","sum_longitude":204.6491},"karana":{"half_tithi_index":36,"name":"Bava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":1977,"month":4,"day":7,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2443240.770833,"ahargana":1854775.2708,"kali_year":5078,"ayanamsa_lahiri":23.5354,"grahas":{"sun":{"sidereal_longitude":353.577593,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":213.324293,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false,"latitude":1.9558},"mars":{"sidereal_longitude":320.8268929999999,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":12.64649300000002,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":37.00349299999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":352.736093,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":true},"saturn":{"sidereal_longitude":106.41949299999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":185.0803,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":5.0803,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"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":1977,"month":4,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443240.770833,"kali_year":5078,"ahargana":1854775.2708,"sun":{"sidereal_longitude":353.784,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":210.8651,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":217.0811,"elapsed_within_tithi_degrees":1.0811},"nakshatra":{"number":16,"name":"Viśākhā","pada":4,"moon_longitude":210.8651,"elapsed_within_degrees":10.8651},"yoga":{"number":16,"name":"Siddhi","sum_longitude":204.6491},"karana":{"half_tithi_index":36,"name":"Bava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.956,"elongation":142.919},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.956,"opposition_distance":37.081}},"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":"06:00","sunsetLocal":"18:39","solarNoonLocal":"12:19","dayLengthHours":12.651629876902577,"dayLengthDisplay":"12 Hours 39 Mins 06 Secs","nightLengthDisplay":"11 Hours 20 Mins 54 Secs","moonriseLocal":"21:43","moonsetLocal":"08:14","rahuKala":{"name":"Rāhu Kāla","start":"13:54","end":"15:29","startHours":13.905080610360038,"endHours":15.48653434497286,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:00","end":"07:35","startHours":5.997811937295927,"endHours":7.579265671908749,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:10","end":"10:45","startHours":9.16071940652157,"endHours":10.742173141134394,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:57","end":"09:22","startHours":8.949858908573194,"endHours":9.371579904469947,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:31","end":"06:52","startHours":6.524963182166867,"endHours":6.862339978884269,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:45","startHours":11.901905879850464,"endHours":12.745347871643968,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:19","end":"05:09","startHours":4.310927953708917,"endHours":5.154369945502421,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:57","end":"06:00","startHours":4.943509447554045,"endHours":5.997811937295927,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:17","startHours":14.432231855230977,"endHours":15.275673847024482,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:27","end":"18:51","startHours":18.449441814198504,"endHours":18.849441814198503,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:39","end":"19:11","startHours":18.649441814198504,"endHours":19.176593059069443,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:24","end":"20:09","startHours":18.399441814198504,"endHours":20.149441814198504,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:45","startHours":23.901905879850464,"endHours":24.74534787164397,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:00","end":"07:35","startHours":5.997811937295927,"endHours":7.579265671908749,"quality":"auspicious"},{"name":"Roga","start":"07:35","end":"09:10","startHours":7.579265671908749,"endHours":9.16071940652157,"quality":"inauspicious"},{"name":"Udveg","start":"09:10","end":"10:45","startHours":9.16071940652157,"endHours":10.742173141134394,"quality":"inauspicious"},{"name":"Chala","start":"10:45","end":"12:19","startHours":10.742173141134394,"endHours":12.323626875747216,"quality":"neutral"},{"name":"Labha","start":"12:19","end":"13:54","startHours":12.323626875747216,"endHours":13.905080610360038,"quality":"auspicious"},{"name":"Amṛta","start":"13:54","end":"15:29","startHours":13.905080610360038,"endHours":15.48653434497286,"quality":"auspicious"},{"name":"Kāla","start":"15:29","end":"17:04","startHours":15.48653434497286,"endHours":17.06798807958568,"quality":"inauspicious"},{"name":"Śubha","start":"17:04","end":"18:39","startHours":17.06798807958568,"endHours":18.649441814198504,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:39","end":"20:04","startHours":18.649441814198504,"endHours":20.06798807958568,"quality":"auspicious"},{"name":"Kāla","start":"20:04","end":"21:29","startHours":20.06798807958568,"endHours":21.48653434497286,"quality":"inauspicious"},{"name":"Śubha","start":"21:29","end":"22:54","startHours":21.48653434497286,"endHours":22.905080610360038,"quality":"auspicious"},{"name":"Roga","start":"22:54","end":"00:19","startHours":22.905080610360038,"endHours":24.323626875747216,"quality":"inauspicious"},{"name":"Udveg","start":"00:19","end":"01:45","startHours":24.323626875747216,"endHours":25.742173141134394,"quality":"inauspicious"},{"name":"Chala","start":"01:45","end":"03:10","startHours":25.742173141134394,"endHours":27.160719406521572,"quality":"neutral"},{"name":"Labha","start":"03:10","end":"04:35","startHours":27.160719406521572,"endHours":28.57926567190875,"quality":"auspicious"},{"name":"Amṛta","start":"04:35","end":"06:00","startHours":28.57926567190875,"endHours":29.99781193729593,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:00","end":"07:00","startHours":5.997811937295927,"endHours":6.997811937295927,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:00","end":"08:00","startHours":6.997811937295927,"endHours":7.997811937295927,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:00","end":"09:00","startHours":7.997811937295927,"endHours":8.997811937295927,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:00","end":"10:00","startHours":8.997811937295927,"endHours":9.997811937295927,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:00","end":"11:00","startHours":9.997811937295927,"endHours":10.997811937295927,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:00","end":"12:00","startHours":10.997811937295927,"endHours":11.997811937295927,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:00","end":"13:00","startHours":11.997811937295927,"endHours":12.997811937295927,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:00","end":"14:00","startHours":12.997811937295927,"endHours":13.997811937295927,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:00","end":"15:00","startHours":13.997811937295927,"endHours":14.997811937295927,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:00","end":"16:00","startHours":14.997811937295927,"endHours":15.997811937295927,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:00","end":"17:00","startHours":15.997811937295927,"endHours":16.99781193729593,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:00","end":"18:00","startHours":16.99781193729593,"endHours":17.99781193729593,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:00","end":"19:00","startHours":17.99781193729593,"endHours":18.99781193729593,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:00","end":"20:00","startHours":18.99781193729593,"endHours":19.99781193729593,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:00","end":"21:00","startHours":19.99781193729593,"endHours":20.99781193729593,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:00","end":"22:00","startHours":20.99781193729593,"endHours":21.99781193729593,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:00","end":"23:00","startHours":21.99781193729593,"endHours":22.99781193729593,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:00","end":"00:00","startHours":22.99781193729593,"endHours":23.99781193729593,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:00","end":"01:00","startHours":23.99781193729593,"endHours":24.99781193729593,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:00","end":"02:00","startHours":24.99781193729593,"endHours":25.99781193729593,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:00","end":"03:00","startHours":25.99781193729593,"endHours":26.99781193729593,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:00","end":"04:00","startHours":26.99781193729593,"endHours":27.99781193729593,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:00","end":"05:00","startHours":27.99781193729593,"endHours":28.99781193729593,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:00","end":"06:00","startHours":28.99781193729593,"endHours":29.99781193729593,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"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":"South (Dakṣiṇa)","chandraVasa":"North-East","rahuVasa":"North-West","anandadiYoga":{"name":"Prajāpati","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":6.721048504950682,"eotMinutes":-2.4880125448329173,"ayanamsa":23.5354}},"calendars":{"vikram_samvat":2034,"vikram_samvatsara":"Pramoda","saka_samvat":1899,"saka_samvatsara":"Piṅgala","bengali_samvat":1384,"malayalam_era":1153,"nanakshahi_year":508,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Kṛṣṇa Caturthī · Vikram 2034 Pramoda · Śaka 1899 Piṅgala"},"festivals":[{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Viśākhā","url":"/day/-0562-04-11","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 April 7, 1977 CE · Ṛṣikeśa · Vidhyamitra","description":"April 7, 1977 CE for Ṛṣikeśa: Kṛṣṇa Caturthī, sūryodaya 06:00, sūryāsta 18:39.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1977-04-07","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1977-04-07","sa":"https://sa.vidhyamitra.com/city/rishikesh/1977-04-07","hi":"https://hi.vidhyamitra.com/city/rishikesh/1977-04-07","x-default":"https://vidhyamitra.com/city/rishikesh/1977-04-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T13:22:20.504Z","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":"2026-05-31T13:22:20.504Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T13:22:20.504Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}