{"id":"vidhyamitra:city-day:phoenix:1981-05-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1981-05-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-05-20","date_display":"May 20, 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":5,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444744.770833,"kali_year":5083,"ahargana":1856279.2708,"sun":{"sidereal_longitude":35.352,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":228.2573,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":192.9053,"elapsed_within_tithi_degrees":0.9053},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1,"moon_longitude":228.2573,"elapsed_within_degrees":1.5906},"yoga":{"number":20,"name":"Śiva","sum_longitude":263.6093},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":5,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444744.770833,"ahargana":1856279.2708,"kali_year":5083,"ayanamsa_lahiri":23.5929,"grahas":{"sun":{"sidereal_longitude":35.357128999999986,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":226.82822899999996,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false,"latitude":3.7786},"mars":{"sidereal_longitude":24.961229000000003,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":56.870228999999995,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":157.11352899999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":46.785829000000035,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":159.38172899999995,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":105.3912,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":285.3912,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":5,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444744.770833,"kali_year":5083,"ahargana":1856279.2708,"sun":{"sidereal_longitude":35.352,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":228.2573,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":192.9053,"elapsed_within_tithi_degrees":0.9053},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1,"moon_longitude":228.2573,"elapsed_within_degrees":1.5906},"yoga":{"number":20,"name":"Śiva","sum_longitude":263.6093},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.779,"elongation":167.095},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.779,"opposition_distance":12.905}},"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":"05:25","sunsetLocal":"19:24","solarNoonLocal":"12:25","dayLengthHours":13.993155633634201,"dayLengthDisplay":"13 Hours 59 Mins 35 Secs","nightLengthDisplay":"10 Hours 00 Mins 25 Secs","moonriseLocal":"20:09","moonsetLocal":"06:12","rahuKala":{"name":"Rāhu Kāla","start":"12:25","end":"14:10","startHours":12.411628116396912,"endHours":14.160772570601187,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:10","end":"08:55","startHours":7.164194753784088,"endHours":8.913339207988363,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:40","end":"12:25","startHours":10.662483662192638,"endHours":12.411628116396912,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:41","end":"09:09","startHours":8.680119947427793,"endHours":9.146558468548932,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:00","end":"06:22","startHours":5.998098450981238,"endHours":6.37124926787815,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:57","end":"12:53","startHours":11.945189595275773,"endHours":12.878066637518051,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:33","end":"04:29","startHours":3.5492962150952523,"endHours":4.482173257337532,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:15","end":"05:25","startHours":4.2489539967769625,"endHours":5.415050299579812,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:45","end":"15:41","startHours":14.743820722002614,"endHours":15.676697764244894,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:12","end":"19:36","startHours":19.208205933214014,"endHours":19.608205933214013,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:24","end":"19:59","startHours":19.408205933214013,"endHours":19.991254084615438,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:09","end":"20:54","startHours":19.158205933214013,"endHours":20.908205933214013,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:57","end":"00:53","startHours":23.94518959527577,"endHours":24.878066637518053,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:25","end":"07:10","startHours":5.415050299579812,"endHours":7.164194753784088,"quality":"auspicious"},{"name":"Amṛta","start":"07:10","end":"08:55","startHours":7.164194753784088,"endHours":8.913339207988363,"quality":"auspicious"},{"name":"Kāla","start":"08:55","end":"10:40","startHours":8.913339207988363,"endHours":10.662483662192638,"quality":"inauspicious"},{"name":"Śubha","start":"10:40","end":"12:25","startHours":10.662483662192638,"endHours":12.411628116396912,"quality":"auspicious"},{"name":"Roga","start":"12:25","end":"14:10","startHours":12.411628116396912,"endHours":14.160772570601187,"quality":"inauspicious"},{"name":"Udveg","start":"14:10","end":"15:55","startHours":14.160772570601187,"endHours":15.909917024805463,"quality":"inauspicious"},{"name":"Chala","start":"15:55","end":"17:40","startHours":15.909917024805463,"endHours":17.659061479009736,"quality":"neutral"},{"name":"Labha","start":"17:40","end":"19:24","startHours":17.659061479009736,"endHours":19.408205933214013,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"19:24","end":"20:40","startHours":19.408205933214013,"endHours":20.65906147900974,"quality":"inauspicious"},{"name":"Chala","start":"20:40","end":"21:55","startHours":20.65906147900974,"endHours":21.909917024805463,"quality":"neutral"},{"name":"Labha","start":"21:55","end":"23:10","startHours":21.909917024805463,"endHours":23.16077257060119,"quality":"auspicious"},{"name":"Amṛta","start":"23:10","end":"00:25","startHours":23.16077257060119,"endHours":24.411628116396912,"quality":"auspicious"},{"name":"Kāla","start":"00:25","end":"01:40","startHours":24.411628116396912,"endHours":25.66248366219264,"quality":"inauspicious"},{"name":"Śubha","start":"01:40","end":"02:55","startHours":25.66248366219264,"endHours":26.913339207988365,"quality":"auspicious"},{"name":"Roga","start":"02:55","end":"04:10","startHours":26.913339207988365,"endHours":28.164194753784088,"quality":"inauspicious"},{"name":"Udveg","start":"04:10","end":"05:25","startHours":28.164194753784088,"endHours":29.41505029957981,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:25","end":"06:25","startHours":5.415050299579812,"endHours":6.415050299579812,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:25","end":"07:25","startHours":6.415050299579812,"endHours":7.415050299579812,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:25","end":"08:25","startHours":7.415050299579812,"endHours":8.415050299579812,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:25","end":"09:25","startHours":8.415050299579812,"endHours":9.415050299579812,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:25","end":"10:25","startHours":9.415050299579812,"endHours":10.415050299579812,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:25","end":"11:25","startHours":10.415050299579812,"endHours":11.415050299579812,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:25","end":"12:25","startHours":11.415050299579812,"endHours":12.415050299579812,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:25","end":"13:25","startHours":12.415050299579812,"endHours":13.415050299579812,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:25","end":"14:25","startHours":13.415050299579812,"endHours":14.415050299579812,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:25","end":"15:25","startHours":14.415050299579812,"endHours":15.415050299579812,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:25","end":"16:25","startHours":15.415050299579812,"endHours":16.41505029957981,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:25","end":"17:25","startHours":16.41505029957981,"endHours":17.41505029957981,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:25","end":"18:25","startHours":17.41505029957981,"endHours":18.41505029957981,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:25","end":"19:25","startHours":18.41505029957981,"endHours":19.41505029957981,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:25","end":"20:25","startHours":19.41505029957981,"endHours":20.41505029957981,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:25","end":"21:25","startHours":20.41505029957981,"endHours":21.41505029957981,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:25","end":"22:25","startHours":21.41505029957981,"endHours":22.41505029957981,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:25","end":"23:25","startHours":22.41505029957981,"endHours":23.41505029957981,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:25","end":"00:25","startHours":23.41505029957981,"endHours":24.41505029957981,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:25","end":"01:25","startHours":24.41505029957981,"endHours":25.41505029957981,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:25","end":"02:25","startHours":25.41505029957981,"endHours":26.41505029957981,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:25","end":"03:25","startHours":26.41505029957981,"endHours":27.41505029957981,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:25","end":"04:25","startHours":27.41505029957981,"endHours":28.41505029957981,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:25","end":"05:25","startHours":28.41505029957981,"endHours":29.41505029957981,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"North-East","rahuVasa":"South-West","anandadiYoga":{"name":"Kāladaṇḍa","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":19.922237756232423,"eotMinutes":3.5983130161851964,"ayanamsa":23.5929}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Kṛṣṇa Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa Dvitīyā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"vrishabha-sankranti","name":"Vṛṣabha Saṅkrānti","name_sanskrit":"वृषभ सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Taurus.","vrata":false,"detection":{"sun_rashi":"Vṛṣabha"},"precedence":5}],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Jyeṣṭhā","url":"/day/-3137-10-20","relevance":0.5}]},"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 May 20, 1981 CE · Phoenix, USA · Vidhyamitra","description":"May 20, 1981 CE for Phoenix, USA: Kṛṣṇa Dvitīyā, sūryodaya 05:25, sūryāsta 19:24.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1981-05-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1981-05-20","sa":"https://sa.vidhyamitra.com/city/phoenix/1981-05-20","hi":"https://hi.vidhyamitra.com/city/phoenix/1981-05-20","x-default":"https://vidhyamitra.com/city/phoenix/1981-05-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T10:11:06.491Z","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":"2026-05-18T10:11:06.491Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T10:11:06.491Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}