{"id":"vidhyamitra:city-day:kanchipuram:1663-04-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/kanchipuram/1663-04-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1663-04-20","date_display":"April 20, 1663 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":1663,"month":4,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2328567.770833,"kali_year":4765,"ahargana":1740102.2708,"sun":{"sidereal_longitude":11.5727,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":164.7708,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":153.1981,"elapsed_within_tithi_degrees":9.1981},"nakshatra":{"number":13,"name":"Hasta","pada":2,"moon_longitude":164.7708,"elapsed_within_degrees":4.7708},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":176.3435},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":1663,"month":4,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2328567.770833,"ahargana":1740102.2708,"kali_year":4765,"ayanamsa_lahiri":19.1496,"grahas":{"sun":{"sidereal_longitude":10.701345000000003,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":164.17114500000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false,"latitude":1.8117},"mars":{"sidereal_longitude":352.118545,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":348.833445,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":239.87084500000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":true},"venus":{"sidereal_longitude":32.30874499999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":241.83324500000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":141.0077,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":321.0077,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"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":1663,"month":4,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2328567.770833,"kali_year":4765,"ahargana":1740102.2708,"sun":{"sidereal_longitude":11.5727,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":164.7708,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":153.1981,"elapsed_within_tithi_degrees":9.1981},"nakshatra":{"number":13,"name":"Hasta","pada":2,"moon_longitude":164.7708,"elapsed_within_degrees":4.7708},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":176.3435},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.812,"elongation":153.198},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.812,"opposition_distance":26.802}},"eclipse_window_40days":[]},"city":{"slug":"kanchipuram","name":"Kāñcīpuram","lat":12.8342,"lon":79.7036,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"kanchipuram","name":"Kāñcīpuram","lat":12.8342,"lon":79.7036,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tirtha"},"sunriseLocal":"05:56","sunsetLocal":"18:24","solarNoonLocal":"12:10","dayLengthHours":12.468010959652162,"dayLengthDisplay":"12 Hours 28 Mins 05 Secs","nightLengthDisplay":"11 Hours 31 Mins 55 Secs","moonriseLocal":"16:23","moonsetLocal":"04:25","rahuKala":{"name":"Rāhu Kāla","start":"10:37","end":"12:10","startHours":10.61179590561613,"endHours":12.17029727557265,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:17","end":"16:51","startHours":15.287300015485691,"endHours":16.84580138544221,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:30","end":"09:03","startHours":7.49479316570309,"endHours":9.05329453565961,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:51","end":"09:16","startHours":8.845494352998742,"endHours":9.261094718320479,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:27","end":"06:47","startHours":6.455792252398743,"endHours":6.7882725446561345,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:45","end":"12:35","startHours":11.754696910250912,"endHours":12.58589764089439,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:16","end":"05:06","startHours":4.273890334459615,"endHours":5.1050910651030925,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:54","end":"05:56","startHours":4.897290882442223,"endHours":5.93629179574657,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:15","end":"15:05","startHours":14.248299102181344,"endHours":15.07949983282482,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:12","end":"18:36","startHours":18.204302755398732,"endHours":18.60430275539873,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:24","end":"18:55","startHours":18.40430275539873,"endHours":18.923803212050906,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:09","end":"19:54","startHours":18.15430275539873,"endHours":19.90430275539873,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:45","end":"00:35","startHours":23.75469691025091,"endHours":24.58589764089439,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"05:56","end":"07:30","startHours":5.93629179574657,"endHours":7.49479316570309,"quality":"neutral"},{"name":"Labha","start":"07:30","end":"09:03","startHours":7.49479316570309,"endHours":9.05329453565961,"quality":"auspicious"},{"name":"Amṛta","start":"09:03","end":"10:37","startHours":9.05329453565961,"endHours":10.61179590561613,"quality":"auspicious"},{"name":"Kāla","start":"10:37","end":"12:10","startHours":10.61179590561613,"endHours":12.17029727557265,"quality":"inauspicious"},{"name":"Śubha","start":"12:10","end":"13:44","startHours":12.17029727557265,"endHours":13.72879864552917,"quality":"auspicious"},{"name":"Roga","start":"13:44","end":"15:17","startHours":13.72879864552917,"endHours":15.287300015485691,"quality":"inauspicious"},{"name":"Udveg","start":"15:17","end":"16:51","startHours":15.287300015485691,"endHours":16.84580138544221,"quality":"inauspicious"},{"name":"Chala","start":"16:51","end":"18:24","startHours":16.84580138544221,"endHours":18.40430275539873,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:24","end":"19:51","startHours":18.40430275539873,"endHours":19.84580138544221,"quality":"inauspicious"},{"name":"Udveg","start":"19:51","end":"21:17","startHours":19.84580138544221,"endHours":21.28730001548569,"quality":"inauspicious"},{"name":"Chala","start":"21:17","end":"22:44","startHours":21.28730001548569,"endHours":22.72879864552917,"quality":"neutral"},{"name":"Labha","start":"22:44","end":"00:10","startHours":22.72879864552917,"endHours":24.17029727557265,"quality":"auspicious"},{"name":"Amṛta","start":"00:10","end":"01:37","startHours":24.17029727557265,"endHours":25.61179590561613,"quality":"auspicious"},{"name":"Kāla","start":"01:37","end":"03:03","startHours":25.61179590561613,"endHours":27.05329453565961,"quality":"inauspicious"},{"name":"Śubha","start":"03:03","end":"04:30","startHours":27.05329453565961,"endHours":28.49479316570309,"quality":"auspicious"},{"name":"Roga","start":"04:30","end":"05:56","startHours":28.49479316570309,"endHours":29.93629179574657,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:56","end":"06:56","startHours":5.93629179574657,"endHours":6.93629179574657,"planetary_lord":"Venus"},{"name":"Hora 2","start":"06:56","end":"07:56","startHours":6.93629179574657,"endHours":7.93629179574657,"planetary_lord":"Sun"},{"name":"Hora 3","start":"07:56","end":"08:56","startHours":7.93629179574657,"endHours":8.93629179574657,"planetary_lord":"Mars"},{"name":"Hora 4","start":"08:56","end":"09:56","startHours":8.93629179574657,"endHours":9.93629179574657,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"09:56","end":"10:56","startHours":9.93629179574657,"endHours":10.93629179574657,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"10:56","end":"11:56","startHours":10.93629179574657,"endHours":11.93629179574657,"planetary_lord":"Moon"},{"name":"Hora 7","start":"11:56","end":"12:56","startHours":11.93629179574657,"endHours":12.93629179574657,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"12:56","end":"13:56","startHours":12.93629179574657,"endHours":13.93629179574657,"planetary_lord":"Venus"},{"name":"Hora 9","start":"13:56","end":"14:56","startHours":13.93629179574657,"endHours":14.93629179574657,"planetary_lord":"Sun"},{"name":"Hora 10","start":"14:56","end":"15:56","startHours":14.93629179574657,"endHours":15.93629179574657,"planetary_lord":"Mars"},{"name":"Hora 11","start":"15:56","end":"16:56","startHours":15.93629179574657,"endHours":16.93629179574657,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"16:56","end":"17:56","startHours":16.93629179574657,"endHours":17.93629179574657,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"17:56","end":"18:56","startHours":17.93629179574657,"endHours":18.93629179574657,"planetary_lord":"Moon"},{"name":"Hora 14","start":"18:56","end":"19:56","startHours":18.93629179574657,"endHours":19.93629179574657,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"19:56","end":"20:56","startHours":19.93629179574657,"endHours":20.93629179574657,"planetary_lord":"Venus"},{"name":"Hora 16","start":"20:56","end":"21:56","startHours":20.93629179574657,"endHours":21.93629179574657,"planetary_lord":"Sun"},{"name":"Hora 17","start":"21:56","end":"22:56","startHours":21.93629179574657,"endHours":22.93629179574657,"planetary_lord":"Mars"},{"name":"Hora 18","start":"22:56","end":"23:56","startHours":22.93629179574657,"endHours":23.93629179574657,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"23:56","end":"00:56","startHours":23.93629179574657,"endHours":24.93629179574657,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"00:56","end":"01:56","startHours":24.93629179574657,"endHours":25.93629179574657,"planetary_lord":"Moon"},{"name":"Hora 21","start":"01:56","end":"02:56","startHours":25.93629179574657,"endHours":26.93629179574657,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"02:56","end":"03:56","startHours":26.93629179574657,"endHours":27.93629179574657,"planetary_lord":"Venus"},{"name":"Hora 23","start":"03:56","end":"04:56","startHours":27.93629179574657,"endHours":28.93629179574657,"planetary_lord":"Sun"},{"name":"Hora 24","start":"04:56","end":"05:56","startHours":28.93629179574657,"endHours":29.93629179574657,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"South-East","anandadiYoga":{"name":"Saumya","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":11.418244871610776,"eotMinutes":0.9677634656409275,"ayanamsa":19.1496}},"calendars":{"vikram_samvat":1720,"vikram_samvatsara":"Nala","saka_samvat":1585,"saka_samvatsara":"Śobhana","bengali_samvat":1070,"malayalam_era":839,"nanakshahi_year":194,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha (Adhika) Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":true,"lunar_month_purnimanta_is_adhika":true,"lunar_month_amanta_is_adhika":true,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha (Adhika) Śukla Trayodaśī · Vikram 1720 Nala · Śaka 1585 Śobhana"},"festivals":[{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"kanchipuram"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 20, 1663 CE · Kāñcīpuram · Vidhyamitra","description":"April 20, 1663 CE for Kāñcīpuram: Śukla Trayodaśī, sūryodaya 05:56, sūryāsta 18:24.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/kanchipuram/1663-04-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/kanchipuram/1663-04-20","sa":"https://sa.vidhyamitra.com/city/kanchipuram/1663-04-20","hi":"https://hi.vidhyamitra.com/city/kanchipuram/1663-04-20","x-default":"https://vidhyamitra.com/city/kanchipuram/1663-04-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-05T02:57:31.661Z","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":"2026-06-05T02:57:31.661Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-05T02:57:31.661Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}