{"id":"vidhyamitra:city-day:erode:1957-04-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1957-04-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1957-04-13","date_display":"April 13, 1957 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":1957,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2435941.770833,"kali_year":5058,"ahargana":1847476.2708,"sun":{"sidereal_longitude":359.8277,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":161.7909,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":161.9632,"elapsed_within_tithi_degrees":5.9632},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":161.7909,"elapsed_within_degrees":1.7909},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":161.6185},"karana":{"half_tithi_index":26,"name":"Gara"},"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":1957,"month":4,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2435941.770833,"ahargana":1847476.2708,"kali_year":5058,"ayanamsa_lahiri":23.2562,"grahas":{"sun":{"sidereal_longitude":359.593368,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":159.76186800000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false,"latitude":-3.447},"mars":{"sidereal_longitude":53.775368000000014,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":19.607867999999996,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":150.52196800000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":true},"venus":{"sidereal_longitude":359.814368,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":231.16366800000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":211.8165,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":31.8165,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","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":1957,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2435941.770833,"kali_year":5058,"ahargana":1847476.2708,"sun":{"sidereal_longitude":359.8277,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":161.7909,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":161.9632,"elapsed_within_tithi_degrees":5.9632},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":161.7909,"elapsed_within_degrees":1.7909},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":161.6185},"karana":{"half_tithi_index":26,"name":"Gara"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.447,"elongation":161.963},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.447,"opposition_distance":18.037}},"eclipse_window_40days":[{"offset_days":17,"type":"solar","occurs":true,"moon_latitude":1.132,"elongation":0.012}]},"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"sunriseLocal":"06:09","sunsetLocal":"18:31","solarNoonLocal":"12:20","dayLengthHours":12.3542904715078,"dayLengthDisplay":"12 Hours 21 Mins 15 Secs","nightLengthDisplay":"11 Hours 38 Mins 45 Secs","moonriseLocal":"16:59","moonsetLocal":"05:02","rahuKala":{"name":"Rāhu Kāla","start":"09:15","end":"10:47","startHours":9.243110895951457,"endHours":10.787397204889931,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:53","end":"15:25","startHours":13.875969822766882,"endHours":15.420256131705356,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:09","end":"07:42","startHours":6.154538278074506,"endHours":7.6988245870129814,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:02","end":"09:27","startHours":9.03720605475966,"endHours":9.449015737143252,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:40","end":"07:00","startHours":6.669300381053998,"endHours":6.998748126960873,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:45","startHours":11.919873831444812,"endHours":12.743493196211999,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:30","end":"05:20","startHours":4.507299548540133,"endHours":5.330918913307319,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:08","end":"06:09","startHours":5.125014072115523,"endHours":6.154538278074506,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:23","end":"15:13","startHours":14.390731925746373,"endHours":15.214351290513559,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:19","end":"18:43","startHours":18.308828749582307,"endHours":18.708828749582306,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:31","end":"19:01","startHours":18.508828749582307,"endHours":19.0235908525618,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:16","end":"20:01","startHours":18.258828749582307,"endHours":20.008828749582307,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:45","startHours":23.91987383144481,"endHours":24.743493196212,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:09","end":"07:42","startHours":6.154538278074506,"endHours":7.6988245870129814,"quality":"inauspicious"},{"name":"Śubha","start":"07:42","end":"09:15","startHours":7.6988245870129814,"endHours":9.243110895951457,"quality":"auspicious"},{"name":"Roga","start":"09:15","end":"10:47","startHours":9.243110895951457,"endHours":10.787397204889931,"quality":"inauspicious"},{"name":"Udveg","start":"10:47","end":"12:20","startHours":10.787397204889931,"endHours":12.331683513828406,"quality":"inauspicious"},{"name":"Chala","start":"12:20","end":"13:53","startHours":12.331683513828406,"endHours":13.875969822766882,"quality":"neutral"},{"name":"Labha","start":"13:53","end":"15:25","startHours":13.875969822766882,"endHours":15.420256131705356,"quality":"auspicious"},{"name":"Amṛta","start":"15:25","end":"16:58","startHours":15.420256131705356,"endHours":16.964542440643832,"quality":"auspicious"},{"name":"Kāla","start":"16:58","end":"18:31","startHours":16.964542440643832,"endHours":18.508828749582307,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:31","end":"19:58","startHours":18.508828749582307,"endHours":19.964542440643832,"quality":"auspicious"},{"name":"Amṛta","start":"19:58","end":"21:25","startHours":19.964542440643832,"endHours":21.420256131705358,"quality":"auspicious"},{"name":"Kāla","start":"21:25","end":"22:53","startHours":21.420256131705358,"endHours":22.875969822766884,"quality":"inauspicious"},{"name":"Śubha","start":"22:53","end":"00:20","startHours":22.875969822766884,"endHours":24.331683513828406,"quality":"auspicious"},{"name":"Roga","start":"00:20","end":"01:47","startHours":24.331683513828406,"endHours":25.78739720488993,"quality":"inauspicious"},{"name":"Udveg","start":"01:47","end":"03:15","startHours":25.78739720488993,"endHours":27.243110895951457,"quality":"inauspicious"},{"name":"Chala","start":"03:15","end":"04:42","startHours":27.243110895951457,"endHours":28.69882458701298,"quality":"neutral"},{"name":"Labha","start":"04:42","end":"06:09","startHours":28.69882458701298,"endHours":30.154538278074504,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:09","end":"07:09","startHours":6.154538278074506,"endHours":7.154538278074506,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:09","end":"08:09","startHours":7.154538278074506,"endHours":8.154538278074506,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:09","end":"09:09","startHours":8.154538278074506,"endHours":9.154538278074506,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:09","end":"10:09","startHours":9.154538278074506,"endHours":10.154538278074506,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:09","end":"11:09","startHours":10.154538278074506,"endHours":11.154538278074506,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:09","end":"12:09","startHours":11.154538278074506,"endHours":12.154538278074506,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:09","end":"13:09","startHours":12.154538278074506,"endHours":13.154538278074506,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:09","end":"14:09","startHours":13.154538278074506,"endHours":14.154538278074506,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:09","end":"15:09","startHours":14.154538278074506,"endHours":15.154538278074506,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:09","end":"16:09","startHours":15.154538278074506,"endHours":16.154538278074504,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:09","end":"17:09","startHours":16.154538278074504,"endHours":17.154538278074504,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:09","end":"18:09","startHours":17.154538278074504,"endHours":18.154538278074504,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:09","end":"19:09","startHours":18.154538278074504,"endHours":19.154538278074504,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:09","end":"20:09","startHours":19.154538278074504,"endHours":20.154538278074504,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:09","end":"21:09","startHours":20.154538278074504,"endHours":21.154538278074504,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:09","end":"22:09","startHours":21.154538278074504,"endHours":22.154538278074504,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:09","end":"23:09","startHours":22.154538278074504,"endHours":23.154538278074504,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:09","end":"00:09","startHours":23.154538278074504,"endHours":24.154538278074504,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:09","end":"01:09","startHours":24.154538278074504,"endHours":25.154538278074504,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:09","end":"02:09","startHours":25.154538278074504,"endHours":26.154538278074504,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:09","end":"03:09","startHours":26.154538278074504,"endHours":27.154538278074504,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:09","end":"04:09","startHours":27.154538278074504,"endHours":28.154538278074504,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:09","end":"05:09","startHours":28.154538278074504,"endHours":29.154538278074504,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:09","end":"06:09","startHours":29.154538278074504,"endHours":30.154538278074504,"planetary_lord":"Mercury"}],"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":"East (Pūrva)","chandraVasa":"North-West","rahuVasa":"East","anandadiYoga":{"name":"Vajra","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":8.8845905071243,"eotMinutes":-0.7698108297043191,"ayanamsa":23.2562}},"calendars":{"vikram_samvat":2014,"vikram_samvatsara":"Sādhāraṇa","saka_samvat":1879,"saka_samvatsara":"Hemalambī","bengali_samvat":1364,"malayalam_era":1133,"nanakshahi_year":488,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","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":"Caitra Śukla Caturdaśī · Vikram 2014 Sādhāraṇa · Śaka 1879 Hemalambī"},"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_ingress":"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_ingress":"Meṣa"},"precedence":2}],"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":"erode"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 13, 1957 CE · Erode, Tamil Nadu · Vidhyamitra","description":"April 13, 1957 CE for Erode, Tamil Nadu: Śukla Caturdaśī, sūryodaya 06:09, sūryāsta 18:31.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1957-04-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1957-04-13","sa":"https://sa.vidhyamitra.com/city/erode/1957-04-13","hi":"https://hi.vidhyamitra.com/city/erode/1957-04-13","x-default":"https://vidhyamitra.com/city/erode/1957-04-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T20:55:17.654Z","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":"2026-05-31T20:55:17.654Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T20:55:17.654Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}