{"id":"vidhyamitra:city-day:rishikesh:1958-04-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1958-04-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1958-04-01","date_display":"April 1, 1958 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":1958,"month":4,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2436294.770833,"kali_year":5059,"ahargana":1847829.2708,"sun":{"sidereal_longitude":347.8043,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":126.0354,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":138.2311,"elapsed_within_tithi_degrees":6.2311},"nakshatra":{"number":10,"name":"Maghā","pada":2,"moon_longitude":126.0354,"elapsed_within_degrees":6.0354},"yoga":{"number":9,"name":"Śūla","sum_longitude":113.8397},"karana":{"half_tithi_index":23,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1958,"month":4,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2436294.770833,"ahargana":1847829.2708,"kali_year":5059,"ayanamsa_lahiri":23.2697,"grahas":{"sun":{"sidereal_longitude":347.540781,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":123.62898100000001,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false,"latitude":-4.144},"mars":{"sidereal_longitude":288.156781,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":6.474281000000019,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":185.84678099999996,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":true},"venus":{"sidereal_longitude":301.9821810000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":242.893281,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":193.1129,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":13.1129,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","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":1958,"month":4,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2436294.770833,"kali_year":5059,"ahargana":1847829.2708,"sun":{"sidereal_longitude":347.8043,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":126.0354,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":138.2311,"elapsed_within_tithi_degrees":6.2311},"nakshatra":{"number":10,"name":"Maghā","pada":2,"moon_longitude":126.0354,"elapsed_within_degrees":6.0354},"yoga":{"number":9,"name":"Śūla","sum_longitude":113.8397},"karana":{"half_tithi_index":23,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.144,"elongation":138.231},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.144,"opposition_distance":41.769}},"eclipse_window_40days":[{"offset_days":18,"type":"solar","occurs":true,"moon_latitude":0.569,"elongation":0.542}]},"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":"06:07","sunsetLocal":"18:35","solarNoonLocal":"12:21","dayLengthHours":12.460098697646986,"dayLengthDisplay":"12 Hours 27 Mins 36 Secs","nightLengthDisplay":"11 Hours 32 Mins 24 Secs","moonriseLocal":"14:53","moonsetLocal":"03:58","rahuKala":{"name":"Rāhu Kāla","start":"15:28","end":"17:02","startHours":15.469589609430937,"endHours":17.02710194663681,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:14","end":"10:48","startHours":9.239540260607443,"endHours":10.797052597813316,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:21","end":"13:55","startHours":12.35456493501919,"endHours":13.912077272225062,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:02","end":"09:27","startHours":9.031871948979994,"endHours":9.447208572234892,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:39","end":"06:59","startHours":6.643686365264322,"endHours":6.975955663868241,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:56","end":"12:46","startHours":11.93922831176429,"endHours":12.769901558274091,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:28","end":"05:18","startHours":4.463169093176099,"endHours":5.293842339685898,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:05","end":"06:07","startHours":5.086174028058448,"endHours":6.124515586195697,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:16","startHours":14.431248051293688,"endHours":15.261921297803486,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:23","end":"18:47","startHours":18.384614283842684,"endHours":18.784614283842682,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:35","end":"19:06","startHours":18.584614283842683,"endHours":19.103785062911307,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:20","end":"20:05","startHours":18.334614283842683,"endHours":20.084614283842683,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:56","end":"00:46","startHours":23.939228311764293,"endHours":24.76990155827409,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:07","end":"07:41","startHours":6.124515586195697,"endHours":7.68202792340157,"quality":"inauspicious"},{"name":"Udveg","start":"07:41","end":"09:14","startHours":7.68202792340157,"endHours":9.239540260607443,"quality":"inauspicious"},{"name":"Chala","start":"09:14","end":"10:48","startHours":9.239540260607443,"endHours":10.797052597813316,"quality":"neutral"},{"name":"Labha","start":"10:48","end":"12:21","startHours":10.797052597813316,"endHours":12.35456493501919,"quality":"auspicious"},{"name":"Amṛta","start":"12:21","end":"13:55","startHours":12.35456493501919,"endHours":13.912077272225062,"quality":"auspicious"},{"name":"Kāla","start":"13:55","end":"15:28","startHours":13.912077272225062,"endHours":15.469589609430937,"quality":"inauspicious"},{"name":"Śubha","start":"15:28","end":"17:02","startHours":15.469589609430937,"endHours":17.02710194663681,"quality":"auspicious"},{"name":"Roga","start":"17:02","end":"18:35","startHours":17.02710194663681,"endHours":18.584614283842683,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:35","end":"20:02","startHours":18.584614283842683,"endHours":20.027101946636808,"quality":"inauspicious"},{"name":"Śubha","start":"20:02","end":"21:28","startHours":20.027101946636808,"endHours":21.469589609430937,"quality":"auspicious"},{"name":"Roga","start":"21:28","end":"22:55","startHours":21.469589609430937,"endHours":22.912077272225062,"quality":"inauspicious"},{"name":"Udveg","start":"22:55","end":"00:21","startHours":22.912077272225062,"endHours":24.35456493501919,"quality":"inauspicious"},{"name":"Chala","start":"00:21","end":"01:48","startHours":24.35456493501919,"endHours":25.797052597813316,"quality":"neutral"},{"name":"Labha","start":"01:48","end":"03:14","startHours":25.797052597813316,"endHours":27.23954026060744,"quality":"auspicious"},{"name":"Amṛta","start":"03:14","end":"04:41","startHours":27.23954026060744,"endHours":28.68202792340157,"quality":"auspicious"},{"name":"Kāla","start":"04:41","end":"06:07","startHours":28.68202792340157,"endHours":30.1245155861957,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:07","end":"07:07","startHours":6.124515586195697,"endHours":7.124515586195697,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:07","end":"08:07","startHours":7.124515586195697,"endHours":8.124515586195697,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:07","end":"09:07","startHours":8.124515586195697,"endHours":9.124515586195697,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:07","end":"10:07","startHours":9.124515586195697,"endHours":10.124515586195697,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:07","end":"11:07","startHours":10.124515586195697,"endHours":11.124515586195697,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:07","end":"12:07","startHours":11.124515586195697,"endHours":12.124515586195697,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:07","end":"13:07","startHours":12.124515586195697,"endHours":13.124515586195697,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:07","end":"14:07","startHours":13.124515586195697,"endHours":14.124515586195697,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:07","end":"15:07","startHours":14.124515586195697,"endHours":15.124515586195697,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:07","end":"16:07","startHours":15.124515586195697,"endHours":16.1245155861957,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:07","end":"17:07","startHours":16.1245155861957,"endHours":17.1245155861957,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:07","end":"18:07","startHours":17.1245155861957,"endHours":18.1245155861957,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:07","end":"19:07","startHours":18.1245155861957,"endHours":19.1245155861957,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:07","end":"20:07","startHours":19.1245155861957,"endHours":20.1245155861957,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:07","end":"21:07","startHours":20.1245155861957,"endHours":21.1245155861957,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:07","end":"22:07","startHours":21.1245155861957,"endHours":22.1245155861957,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:07","end":"23:07","startHours":22.1245155861957,"endHours":23.1245155861957,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:07","end":"00:07","startHours":23.1245155861957,"endHours":24.1245155861957,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:07","end":"01:07","startHours":24.1245155861957,"endHours":25.1245155861957,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:07","end":"02:07","startHours":25.1245155861957,"endHours":26.1245155861957,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:07","end":"03:07","startHours":26.1245155861957,"endHours":27.1245155861957,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:07","end":"04:07","startHours":27.1245155861957,"endHours":28.1245155861957,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:07","end":"05:07","startHours":28.1245155861957,"endHours":29.1245155861957,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:07","end":"06:07","startHours":29.1245155861957,"endHours":30.1245155861957,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","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":"North (Uttara)","chandraVasa":"West","rahuVasa":"North","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"drikRitu":"Vasanta (Spring) (Drik)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":4.278187774216453,"eotMinutes":-4.344296101151456,"ayanamsa":23.2697}},"calendars":{"vikram_samvat":2015,"vikram_samvatsara":"Virodhakṛt","saka_samvat":1880,"saka_samvatsara":"Vilambī","bengali_samvat":1365,"malayalam_era":1134,"nanakshahi_year":489,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Dvādaśī · Vikram 2015 Virodhakṛt · Śaka 1880 Vilambī"},"festivals":[{"id":"mina-sankranti","name":"Mīna Saṅkrānti","name_sanskrit":"मीन सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Pisces; Mīna-māsa begins.","vrata":false,"detection":{"sun_rashi":"Mīna"},"precedence":5}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — 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 1, 1958 CE · Ṛṣikeśa · Vidhyamitra","description":"April 1, 1958 CE for Ṛṣikeśa: Śukla Dvādaśī, sūryodaya 06:07, sūryāsta 18:35.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1958-04-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1958-04-01","sa":"https://sa.vidhyamitra.com/city/rishikesh/1958-04-01","hi":"https://hi.vidhyamitra.com/city/rishikesh/1958-04-01","x-default":"https://vidhyamitra.com/city/rishikesh/1958-04-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-20T16:17:45.090Z","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":"2026-05-20T16:17:45.090Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-20T16:17:45.090Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}