{"id":"vidhyamitra:city-day:phoenix:1981-09-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1981-09-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-09-18","date_display":"September 18, 1981 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":1981,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444865.770833,"kali_year":5083,"ahargana":1856400.2708,"sun":{"sidereal_longitude":150.7595,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":21.3068,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":20,"name":"Pañcamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pañcamī","elongation_degrees":230.5473,"elapsed_within_tithi_degrees":2.5473},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3,"moon_longitude":21.3068,"elapsed_within_degrees":7.9735},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":172.0663},"karana":{"half_tithi_index":38,"name":"Kaulava"},"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":1981,"month":9,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444865.770833,"ahargana":1856400.2708,"kali_year":5083,"ayanamsa_lahiri":23.5975,"grahas":{"sun":{"sidereal_longitude":151.448106,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":24.311706000000015,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false,"latitude":-4.3961},"mars":{"sidereal_longitude":106.69640600000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":177.31030599999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":171.879006,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"venus":{"sidereal_longitude":192.60840600000006,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":166.72120599999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":98.98,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":278.98,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":1981,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444865.770833,"kali_year":5083,"ahargana":1856400.2708,"sun":{"sidereal_longitude":150.7595,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":21.3068,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":20,"name":"Pañcamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pañcamī","elongation_degrees":230.5473,"elapsed_within_tithi_degrees":2.5473},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3,"moon_longitude":21.3068,"elapsed_within_degrees":7.9735},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":172.0663},"karana":{"half_tithi_index":38,"name":"Kaulava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.396,"elongation":129.453},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.396,"opposition_distance":50.547}},"eclipse_window_40days":[]},"city":{"slug":"phoenix","name":"Phoenix, USA","lat":33.4484,"lon":-112.074,"tz_offset_hours":-7,"country":"US","tier":"diaspora"},"tier2":{"city":{"slug":"phoenix","name":"Phoenix, USA","lat":33.4484,"lon":-112.074,"tz_offset_hours":-7,"country":"US","tier":"diaspora"},"sunriseLocal":"06:12","sunsetLocal":"18:31","solarNoonLocal":"12:22","dayLengthHours":12.306716229033619,"dayLengthDisplay":"12 Hours 18 Mins 24 Secs","nightLengthDisplay":"11 Hours 41 Mins 36 Secs","moonriseLocal":"21:03","moonsetLocal":"10:43","rahuKala":{"name":"Rāhu Kāla","start":"10:49","end":"12:22","startHours":10.823093435142889,"endHours":12.361432963772092,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:26","end":"16:59","startHours":15.438112021030495,"endHours":16.9764515496597,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:45","end":"09:17","startHours":7.746414377884484,"endHours":9.284753906513686,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:05","end":"09:29","startHours":9.079641969363127,"endHours":9.489865843664248,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:43","end":"07:03","startHours":6.720854692131683,"endHours":7.04903379157258,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:57","end":"12:46","startHours":11.951209089470971,"endHours":12.771656838073213,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:34","end":"05:23","startHours":4.5671793520507995,"endHours":5.387627100653041,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:11","end":"06:12","startHours":5.18251516350248,"endHours":6.208074849255282,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:25","end":"15:14","startHours":14.412552335277695,"endHours":15.233000083879936,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:19","end":"18:43","startHours":18.314791078288902,"endHours":18.7147910782889,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:31","end":"19:02","startHours":18.5147910782889,"endHours":19.027570921165303,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:16","end":"20:01","startHours":18.2647910782889,"endHours":20.0147910782889,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:57","end":"00:46","startHours":23.95120908947097,"endHours":24.771656838073213,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:12","end":"07:45","startHours":6.208074849255282,"endHours":7.746414377884484,"quality":"neutral"},{"name":"Labha","start":"07:45","end":"09:17","startHours":7.746414377884484,"endHours":9.284753906513686,"quality":"auspicious"},{"name":"Amṛta","start":"09:17","end":"10:49","startHours":9.284753906513686,"endHours":10.823093435142889,"quality":"auspicious"},{"name":"Kāla","start":"10:49","end":"12:22","startHours":10.823093435142889,"endHours":12.361432963772092,"quality":"inauspicious"},{"name":"Śubha","start":"12:22","end":"13:54","startHours":12.361432963772092,"endHours":13.899772492401294,"quality":"auspicious"},{"name":"Roga","start":"13:54","end":"15:26","startHours":13.899772492401294,"endHours":15.438112021030495,"quality":"inauspicious"},{"name":"Udveg","start":"15:26","end":"16:59","startHours":15.438112021030495,"endHours":16.9764515496597,"quality":"inauspicious"},{"name":"Chala","start":"16:59","end":"18:31","startHours":16.9764515496597,"endHours":18.5147910782889,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:31","end":"19:59","startHours":18.5147910782889,"endHours":19.9764515496597,"quality":"inauspicious"},{"name":"Udveg","start":"19:59","end":"21:26","startHours":19.9764515496597,"endHours":21.4381120210305,"quality":"inauspicious"},{"name":"Chala","start":"21:26","end":"22:54","startHours":21.4381120210305,"endHours":22.899772492401294,"quality":"neutral"},{"name":"Labha","start":"22:54","end":"00:22","startHours":22.899772492401294,"endHours":24.361432963772092,"quality":"auspicious"},{"name":"Amṛta","start":"00:22","end":"01:49","startHours":24.361432963772092,"endHours":25.82309343514289,"quality":"auspicious"},{"name":"Kāla","start":"01:49","end":"03:17","startHours":25.82309343514289,"endHours":27.284753906513686,"quality":"inauspicious"},{"name":"Śubha","start":"03:17","end":"04:45","startHours":27.284753906513686,"endHours":28.746414377884484,"quality":"auspicious"},{"name":"Roga","start":"04:45","end":"06:12","startHours":28.746414377884484,"endHours":30.208074849255283,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:12","end":"07:12","startHours":6.208074849255282,"endHours":7.208074849255282,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:12","end":"08:12","startHours":7.208074849255282,"endHours":8.208074849255283,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:12","end":"09:12","startHours":8.208074849255283,"endHours":9.208074849255283,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:12","end":"10:12","startHours":9.208074849255283,"endHours":10.208074849255283,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:12","end":"11:12","startHours":10.208074849255283,"endHours":11.208074849255283,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:12","end":"12:12","startHours":11.208074849255283,"endHours":12.208074849255283,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:12","end":"13:12","startHours":12.208074849255283,"endHours":13.208074849255283,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:12","end":"14:12","startHours":13.208074849255283,"endHours":14.208074849255283,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:12","end":"15:12","startHours":14.208074849255283,"endHours":15.208074849255283,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:12","end":"16:12","startHours":15.208074849255283,"endHours":16.208074849255283,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:12","end":"17:12","startHours":16.208074849255283,"endHours":17.208074849255283,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:12","end":"18:12","startHours":17.208074849255283,"endHours":18.208074849255283,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:12","end":"19:12","startHours":18.208074849255283,"endHours":19.208074849255283,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:12","end":"20:12","startHours":19.208074849255283,"endHours":20.208074849255283,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:12","end":"21:12","startHours":20.208074849255283,"endHours":21.208074849255283,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:12","end":"22:12","startHours":21.208074849255283,"endHours":22.208074849255283,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:12","end":"23:12","startHours":22.208074849255283,"endHours":23.208074849255283,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:12","end":"00:12","startHours":23.208074849255283,"endHours":24.208074849255283,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:12","end":"01:12","startHours":24.208074849255283,"endHours":25.208074849255283,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:12","end":"02:12","startHours":25.208074849255283,"endHours":26.208074849255283,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:12","end":"03:12","startHours":26.208074849255283,"endHours":27.208074849255283,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:12","end":"04:12","startHours":27.208074849255283,"endHours":28.208074849255283,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:12","end":"05:12","startHours":28.208074849255283,"endHours":29.208074849255283,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:12","end":"06:12","startHours":29.208074849255283,"endHours":30.208074849255283,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"South-East","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":1.968455806324778,"eotMinutes":6.610022173674397,"ayanamsa":23.5975}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Bhādrapada","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Kṛṣṇa Pañcamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"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":"phoenix"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga September 18, 1981 CE · Phoenix, USA · Vidhyamitra","description":"September 18, 1981 CE for Phoenix, USA: Kṛṣṇa Pañcamī, sūryodaya 06:12, sūryāsta 18:31.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1981-09-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1981-09-18","sa":"https://sa.vidhyamitra.com/city/phoenix/1981-09-18","hi":"https://hi.vidhyamitra.com/city/phoenix/1981-09-18","x-default":"https://vidhyamitra.com/city/phoenix/1981-09-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-30T22:35:57.183Z","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":"2026-05-30T22:35:57.183Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-30T22:35:57.183Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}