{"id":"vidhyamitra:city-day:phoenix:1981-08-30:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1981-08-30","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-08-30","date_display":"August 30, 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":8,"day":30,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444846.770833,"kali_year":5083,"ahargana":1856381.2708,"sun":{"sidereal_longitude":132.3586,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":139.6106,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.252,"elapsed_within_tithi_degrees":7.252},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":139.6106,"elapsed_within_degrees":6.2773},"yoga":{"number":21,"name":"Siddha","sum_longitude":271.9692},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":8,"day":30,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444846.770833,"ahargana":1856381.2708,"kali_year":5083,"ayanamsa_lahiri":23.5968,"grahas":{"sun":{"sidereal_longitude":132.99413200000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":138.14223200000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false,"latitude":2.8681},"mars":{"sidereal_longitude":94.71873199999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":150.45363199999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":168.00303200000008,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"venus":{"sidereal_longitude":170.290032,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":164.52803199999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":99.9867,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":279.9867,"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":8,"day":30,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444846.770833,"kali_year":5083,"ahargana":1856381.2708,"sun":{"sidereal_longitude":132.3586,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":139.6106,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.252,"elapsed_within_tithi_degrees":7.252},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":139.6106,"elapsed_within_degrees":6.2773},"yoga":{"number":21,"name":"Siddha","sum_longitude":271.9692},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.868,"elongation":7.252},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.868,"opposition_distance":172.748}},"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":"06:00","sunsetLocal":"18:57","solarNoonLocal":"12:28","dayLengthHours":12.944790708240895,"dayLengthDisplay":"12 Hours 56 Mins 41 Secs","nightLengthDisplay":"11 Hours 03 Mins 19 Secs","moonriseLocal":"06:27","moonsetLocal":"19:11","rahuKala":{"name":"Rāhu Kāla","start":"17:20","end":"18:57","startHours":17.328883037903196,"endHours":18.94698187643331,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:28","end":"14:06","startHours":12.474586522312862,"endHours":14.092685360842975,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:43","end":"17:20","startHours":15.710784199373087,"endHours":17.328883037903196,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:01","end":"09:27","startHours":9.022642333448625,"endHours":9.454135357056654,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:32","end":"06:53","startHours":6.541557447702453,"endHours":6.8867518665888765,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:03","end":"12:54","startHours":12.043093498704833,"endHours":12.90607954592089,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:17","end":"05:08","startHours":4.276219073760296,"endHours":5.139205120976356,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:55","end":"06:00","startHours":4.923458609172341,"endHours":6.002191168192415,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:38","end":"15:30","startHours":14.632051640353012,"endHours":15.495037687569072,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:45","end":"19:09","startHours":18.74698187643331,"endHours":19.14698187643331,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:57","end":"19:29","startHours":18.94698187643331,"endHours":19.486348155943347,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:42","end":"20:27","startHours":18.69698187643331,"endHours":20.44698187643331,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:03","end":"00:54","startHours":24.04309349870483,"endHours":24.906079545920893,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:00","end":"07:37","startHours":6.002191168192415,"endHours":7.620290006722527,"quality":"inauspicious"},{"name":"Chala","start":"07:37","end":"09:14","startHours":7.620290006722527,"endHours":9.23838884525264,"quality":"neutral"},{"name":"Labha","start":"09:14","end":"10:51","startHours":9.23838884525264,"endHours":10.85648768378275,"quality":"auspicious"},{"name":"Amṛta","start":"10:51","end":"12:28","startHours":10.85648768378275,"endHours":12.474586522312862,"quality":"auspicious"},{"name":"Kāla","start":"12:28","end":"14:06","startHours":12.474586522312862,"endHours":14.092685360842975,"quality":"inauspicious"},{"name":"Śubha","start":"14:06","end":"15:43","startHours":14.092685360842975,"endHours":15.710784199373087,"quality":"auspicious"},{"name":"Roga","start":"15:43","end":"17:20","startHours":15.710784199373087,"endHours":17.328883037903196,"quality":"inauspicious"},{"name":"Udveg","start":"17:20","end":"18:57","startHours":17.328883037903196,"endHours":18.94698187643331,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:57","end":"20:20","startHours":18.94698187643331,"endHours":20.328883037903196,"quality":"auspicious"},{"name":"Roga","start":"20:20","end":"21:43","startHours":20.328883037903196,"endHours":21.710784199373087,"quality":"inauspicious"},{"name":"Udveg","start":"21:43","end":"23:06","startHours":21.710784199373087,"endHours":23.092685360842975,"quality":"inauspicious"},{"name":"Chala","start":"23:06","end":"00:28","startHours":23.092685360842975,"endHours":24.474586522312862,"quality":"neutral"},{"name":"Labha","start":"00:28","end":"01:51","startHours":24.474586522312862,"endHours":25.85648768378275,"quality":"auspicious"},{"name":"Amṛta","start":"01:51","end":"03:14","startHours":25.85648768378275,"endHours":27.238388845252636,"quality":"auspicious"},{"name":"Kāla","start":"03:14","end":"04:37","startHours":27.238388845252636,"endHours":28.620290006722527,"quality":"inauspicious"},{"name":"Śubha","start":"04:37","end":"06:00","startHours":28.620290006722527,"endHours":30.002191168192414,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:00","end":"07:00","startHours":6.002191168192415,"endHours":7.002191168192415,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:00","end":"08:00","startHours":7.002191168192415,"endHours":8.002191168192414,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:00","end":"09:00","startHours":8.002191168192414,"endHours":9.002191168192414,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:00","end":"10:00","startHours":9.002191168192414,"endHours":10.002191168192414,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:00","end":"11:00","startHours":10.002191168192414,"endHours":11.002191168192414,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:00","end":"12:00","startHours":11.002191168192414,"endHours":12.002191168192414,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:00","end":"13:00","startHours":12.002191168192414,"endHours":13.002191168192414,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:00","end":"14:00","startHours":13.002191168192414,"endHours":14.002191168192414,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:00","end":"15:00","startHours":14.002191168192414,"endHours":15.002191168192414,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:00","end":"16:00","startHours":15.002191168192414,"endHours":16.002191168192414,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:00","end":"17:00","startHours":16.002191168192414,"endHours":17.002191168192414,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:00","end":"18:00","startHours":17.002191168192414,"endHours":18.002191168192414,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:00","end":"19:00","startHours":18.002191168192414,"endHours":19.002191168192414,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:00","end":"20:00","startHours":19.002191168192414,"endHours":20.002191168192414,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:00","end":"21:00","startHours":20.002191168192414,"endHours":21.002191168192414,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:00","end":"22:00","startHours":21.002191168192414,"endHours":22.002191168192414,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:00","end":"23:00","startHours":22.002191168192414,"endHours":23.002191168192414,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:00","end":"00:00","startHours":23.002191168192414,"endHours":24.002191168192414,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:00","end":"01:00","startHours":24.002191168192414,"endHours":25.002191168192414,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:00","end":"02:00","startHours":25.002191168192414,"endHours":26.002191168192414,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:00","end":"03:00","startHours":26.002191168192414,"endHours":27.002191168192414,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:00","end":"04:00","startHours":27.002191168192414,"endHours":28.002191168192414,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:00","end":"05:00","startHours":28.002191168192414,"endHours":29.002191168192414,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:00","end":"06:00","startHours":29.002191168192414,"endHours":30.002191168192414,"planetary_lord":"Jupiter"}],"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":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"West","rahuVasa":"North-East","anandadiYoga":{"name":"Chatra","quality":"Auspicious"},"drikRitu":"Varṣā (Monsoon) (Drik)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":9.09177833503008,"eotMinutes":-0.17919133877174764,"ayanamsa":23.5968}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Pratipada · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi":"Siṃha"},"precedence":5}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — 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 August 30, 1981 CE · Phoenix, USA · Vidhyamitra","description":"August 30, 1981 CE for Phoenix, USA: Śukla Pratipada, sūryodaya 06:00, sūryāsta 18:57.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1981-08-30","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1981-08-30","sa":"https://sa.vidhyamitra.com/city/phoenix/1981-08-30","hi":"https://hi.vidhyamitra.com/city/phoenix/1981-08-30","x-default":"https://vidhyamitra.com/city/phoenix/1981-08-30"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T19:17:59.926Z","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":"2026-05-18T19:17:59.926Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T19:17:59.926Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}