{"id":"vidhyamitra:city-day:rishikesh:1963-04-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1963-04-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1963-04-15","date_display":"April 15, 1963 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":1963,"month":4,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2438134.770833,"kali_year":5064,"ahargana":1849669.2708,"sun":{"sidereal_longitude":1.2406,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":251.0193,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":21,"name":"Ṣaṣṭhī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ṣaṣṭhī","elongation_degrees":249.7787,"elapsed_within_tithi_degrees":9.7787},"nakshatra":{"number":19,"name":"Mūla","pada":4,"moon_longitude":251.0193,"elapsed_within_degrees":11.0193},"yoga":{"number":19,"name":"Parigha","sum_longitude":252.26},"karana":{"half_tithi_index":41,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":1963,"month":4,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2438134.770833,"ahargana":1849669.2708,"kali_year":5064,"ayanamsa_lahiri":23.3401,"grahas":{"sun":{"sidereal_longitude":1.0247800000000211,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":247.02657999999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false,"latitude":1.8718},"mars":{"sidereal_longitude":107.05198000000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":16.961180000000013,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":339.96788,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":326.28348000000005,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":298.52428,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":95.6208,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":275.6208,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":1963,"month":4,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2438134.770833,"kali_year":5064,"ahargana":1849669.2708,"sun":{"sidereal_longitude":1.2406,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":251.0193,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":21,"name":"Ṣaṣṭhī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ṣaṣṭhī","elongation_degrees":249.7787,"elapsed_within_tithi_degrees":9.7787},"nakshatra":{"number":19,"name":"Mūla","pada":4,"moon_longitude":251.0193,"elapsed_within_degrees":11.0193},"yoga":{"number":19,"name":"Parigha","sum_longitude":252.26},"karana":{"half_tithi_index":41,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.872,"elongation":110.221},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.872,"opposition_distance":69.779}},"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":"05:51","sunsetLocal":"18:43","solarNoonLocal":"12:17","dayLengthHours":12.868213201729455,"dayLengthDisplay":"12 Hours 52 Mins 06 Secs","nightLengthDisplay":"11 Hours 07 Mins 54 Secs","moonriseLocal":"23:36","moonsetLocal":"09:46","rahuKala":{"name":"Rāhu Kāla","start":"07:28","end":"09:04","startHours":7.4605821169815725,"endHours":9.069108767197754,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:41","end":"12:17","startHours":10.677635417413937,"endHours":12.28616206763012,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:54","end":"15:30","startHours":13.8946887178463,"endHours":15.503215368062483,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:51","end":"09:17","startHours":8.85463854716893,"endHours":9.28357898722658,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:23","end":"06:44","startHours":6.388231016837452,"endHours":6.73138336888357,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:51","end":"12:43","startHours":11.857221627572471,"endHours":12.715102507687767,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:08","end":"05:00","startHours":4.136293706534797,"endHours":4.994174586650094,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:47","end":"05:51","startHours":4.779704366621269,"endHours":5.852055466765391,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:17","startHours":14.430864267918361,"endHours":15.288745148033659,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:31","end":"18:55","startHours":18.520268668494847,"endHours":18.920268668494845,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:43","end":"19:15","startHours":18.720268668494846,"endHours":19.256444218566905,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:28","end":"20:13","startHours":18.470268668494846,"endHours":20.220268668494846,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:51","end":"00:43","startHours":23.85722162757247,"endHours":24.715102507687767,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:51","end":"07:28","startHours":5.852055466765391,"endHours":7.4605821169815725,"quality":"auspicious"},{"name":"Kāla","start":"07:28","end":"09:04","startHours":7.4605821169815725,"endHours":9.069108767197754,"quality":"inauspicious"},{"name":"Śubha","start":"09:04","end":"10:41","startHours":9.069108767197754,"endHours":10.677635417413937,"quality":"auspicious"},{"name":"Roga","start":"10:41","end":"12:17","startHours":10.677635417413937,"endHours":12.28616206763012,"quality":"inauspicious"},{"name":"Udveg","start":"12:17","end":"13:54","startHours":12.28616206763012,"endHours":13.8946887178463,"quality":"inauspicious"},{"name":"Chala","start":"13:54","end":"15:30","startHours":13.8946887178463,"endHours":15.503215368062483,"quality":"neutral"},{"name":"Labha","start":"15:30","end":"17:07","startHours":15.503215368062483,"endHours":17.11174201827866,"quality":"auspicious"},{"name":"Amṛta","start":"17:07","end":"18:43","startHours":17.11174201827866,"endHours":18.720268668494846,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:43","end":"20:07","startHours":18.720268668494846,"endHours":20.111742018278665,"quality":"neutral"},{"name":"Labha","start":"20:07","end":"21:30","startHours":20.111742018278665,"endHours":21.50321536806248,"quality":"auspicious"},{"name":"Amṛta","start":"21:30","end":"22:54","startHours":21.50321536806248,"endHours":22.8946887178463,"quality":"auspicious"},{"name":"Kāla","start":"22:54","end":"00:17","startHours":22.8946887178463,"endHours":24.28616206763012,"quality":"inauspicious"},{"name":"Śubha","start":"00:17","end":"01:41","startHours":24.28616206763012,"endHours":25.67763541741394,"quality":"auspicious"},{"name":"Roga","start":"01:41","end":"03:04","startHours":25.67763541741394,"endHours":27.069108767197754,"quality":"inauspicious"},{"name":"Udveg","start":"03:04","end":"04:28","startHours":27.069108767197754,"endHours":28.460582116981573,"quality":"inauspicious"},{"name":"Chala","start":"04:28","end":"05:51","startHours":28.460582116981573,"endHours":29.852055466765393,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:51","end":"06:51","startHours":5.852055466765391,"endHours":6.852055466765391,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:51","end":"07:51","startHours":6.852055466765391,"endHours":7.852055466765391,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:51","end":"08:51","startHours":7.852055466765391,"endHours":8.85205546676539,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:51","end":"09:51","startHours":8.85205546676539,"endHours":9.85205546676539,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:51","end":"10:51","startHours":9.85205546676539,"endHours":10.85205546676539,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:51","end":"11:51","startHours":10.85205546676539,"endHours":11.85205546676539,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:51","end":"12:51","startHours":11.85205546676539,"endHours":12.85205546676539,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:51","end":"13:51","startHours":12.85205546676539,"endHours":13.85205546676539,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:51","end":"14:51","startHours":13.85205546676539,"endHours":14.85205546676539,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:51","end":"15:51","startHours":14.85205546676539,"endHours":15.85205546676539,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:51","end":"16:51","startHours":15.85205546676539,"endHours":16.852055466765393,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:51","end":"17:51","startHours":16.852055466765393,"endHours":17.852055466765393,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:51","end":"18:51","startHours":17.852055466765393,"endHours":18.852055466765393,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:51","end":"19:51","startHours":18.852055466765393,"endHours":19.852055466765393,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:51","end":"20:51","startHours":19.852055466765393,"endHours":20.852055466765393,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:51","end":"21:51","startHours":20.852055466765393,"endHours":21.852055466765393,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:51","end":"22:51","startHours":21.852055466765393,"endHours":22.852055466765393,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:51","end":"23:51","startHours":22.852055466765393,"endHours":23.852055466765393,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:51","end":"00:51","startHours":23.852055466765393,"endHours":24.852055466765393,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:51","end":"01:51","startHours":24.852055466765393,"endHours":25.852055466765393,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:51","end":"02:51","startHours":25.852055466765393,"endHours":26.852055466765393,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:51","end":"03:51","startHours":26.852055466765393,"endHours":27.852055466765393,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:51","end":"04:51","startHours":27.852055466765393,"endHours":28.852055466765393,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:51","end":"05:51","startHours":28.852055466765393,"endHours":29.852055466765393,"planetary_lord":"Venus"}],"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","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Gada","quality":"Inauspicious"},"drikRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":9.443967737270627,"eotMinutes":-0.240124057807095,"ayanamsa":23.3401}},"calendars":{"vikram_samvat":2020,"vikram_samvatsara":"Nala","saka_samvat":1885,"saka_samvatsara":"Śobhana","bengali_samvat":1370,"malayalam_era":1139,"nanakshahi_year":494,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Kṛṣṇa Ṣaṣṭhī · Vikram 2020 Nala · Śaka 1885 Śobhana"},"festivals":[{"id":"mesha-sankranti","name":"Meṣa Saṅkrānti (Vaiśākhī / Vishu / Pohelā Boishākh / Bihu)","name_sanskrit":"मेष सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aries; solar new year. Regional: Vaiśākhī (Punjab) · Vishu (Kerala) · Pohelā Boishākh (Bengal) · Bihu (Assam) · Tamil Puthāṇḍu.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":1},{"id":"baisakhi","name":"Baisakhi (Vaiśākhī)","name_sanskrit":"वैशाखी","tradition":"Regional","associated_deity":"Sūrya + Khalsa Pantha (Sikh)","significance":"Punjab New Year + Sikh Khalsa founding day.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":2}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — 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 15, 1963 CE · Ṛṣikeśa · Vidhyamitra","description":"April 15, 1963 CE for Ṛṣikeśa: Kṛṣṇa Ṣaṣṭhī, sūryodaya 05:51, sūryāsta 18:43.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1963-04-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1963-04-15","sa":"https://sa.vidhyamitra.com/city/rishikesh/1963-04-15","hi":"https://hi.vidhyamitra.com/city/rishikesh/1963-04-15","x-default":"https://vidhyamitra.com/city/rishikesh/1963-04-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-20T01:03:15.859Z","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":"2026-05-20T01:03:15.859Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-20T01:03:15.859Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}