{"id":"vidhyamitra:city-day:phoenix:2011-05-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/2011-05-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2011-05-01","date_display":"May 1, 2011 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":2011,"month":5,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455682.770833,"kali_year":5113,"ahargana":1867217.2708,"sun":{"sidereal_longitude":16.3643,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":350.5041,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":334.1397,"elapsed_within_tithi_degrees":10.1397},"nakshatra":{"number":27,"name":"Revatī","pada":2,"moon_longitude":350.5041,"elapsed_within_degrees":3.8374},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":6.8684},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"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":2011,"month":5,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2455682.770833,"ahargana":1867217.2708,"kali_year":5113,"ayanamsa_lahiri":24.0113,"grahas":{"sun":{"sidereal_longitude":16.327517,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":351.568517,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false,"latitude":4.3532},"mars":{"sidereal_longitude":358.036217,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":350.991617,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":358.283617,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":347.814217,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":167.66281700000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":true},"rahu":{"sidereal_longitude":245.8433,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":65.8433,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","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":2011,"month":5,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455682.770833,"kali_year":5113,"ahargana":1867217.2708,"sun":{"sidereal_longitude":16.3643,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":350.5041,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":334.1397,"elapsed_within_tithi_degrees":10.1397},"nakshatra":{"number":27,"name":"Revatī","pada":2,"moon_longitude":350.5041,"elapsed_within_degrees":3.8374},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":6.8684},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.353,"elongation":25.86},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.353,"opposition_distance":154.14}},"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":"05:41","sunsetLocal":"19:10","solarNoonLocal":"12:25","dayLengthHours":13.491796534150495,"dayLengthDisplay":"13 Hours 29 Mins 30 Secs","nightLengthDisplay":"10 Hours 30 Mins 30 Secs","moonriseLocal":"04:27","moonsetLocal":"17:05","rahuKala":{"name":"Rāhu Kāla","start":"17:29","end":"19:10","startHours":17.482390244823655,"endHours":19.168864811592467,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:25","end":"14:07","startHours":12.42296654451722,"endHours":14.109441111286031,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:48","end":"17:29","startHours":15.795915678054843,"endHours":17.482390244823655,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:50","end":"09:16","startHours":8.825154135410422,"endHours":9.274880686548771,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:14","end":"06:36","startHours":6.239226466364909,"endHours":6.599007707275589,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:58","end":"12:52","startHours":11.97323999337887,"endHours":12.872693095655569,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:53","end":"04:47","startHours":3.878162072888572,"endHours":4.7776151751652725,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:33","end":"05:41","startHours":4.552751899596097,"endHours":5.677068277441972,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:40","end":"15:34","startHours":14.67159930020897,"endHours":15.57105240248567,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:58","end":"19:22","startHours":18.968864811592468,"endHours":19.368864811592466,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:10","end":"19:44","startHours":19.168864811592467,"endHours":19.731023000515403,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:55","end":"20:40","startHours":18.918864811592467,"endHours":20.668864811592467,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:58","end":"00:52","startHours":23.97323999337887,"endHours":24.87269309565557,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:41","end":"07:22","startHours":5.677068277441972,"endHours":7.363542844210784,"quality":"inauspicious"},{"name":"Chala","start":"07:22","end":"09:03","startHours":7.363542844210784,"endHours":9.050017410979596,"quality":"neutral"},{"name":"Labha","start":"09:03","end":"10:44","startHours":9.050017410979596,"endHours":10.736491977748408,"quality":"auspicious"},{"name":"Amṛta","start":"10:44","end":"12:25","startHours":10.736491977748408,"endHours":12.42296654451722,"quality":"auspicious"},{"name":"Kāla","start":"12:25","end":"14:07","startHours":12.42296654451722,"endHours":14.109441111286031,"quality":"inauspicious"},{"name":"Śubha","start":"14:07","end":"15:48","startHours":14.109441111286031,"endHours":15.795915678054843,"quality":"auspicious"},{"name":"Roga","start":"15:48","end":"17:29","startHours":15.795915678054843,"endHours":17.482390244823655,"quality":"inauspicious"},{"name":"Udveg","start":"17:29","end":"19:10","startHours":17.482390244823655,"endHours":19.168864811592467,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:10","end":"20:29","startHours":19.168864811592467,"endHours":20.482390244823655,"quality":"auspicious"},{"name":"Roga","start":"20:29","end":"21:48","startHours":20.482390244823655,"endHours":21.795915678054843,"quality":"inauspicious"},{"name":"Udveg","start":"21:48","end":"23:07","startHours":21.795915678054843,"endHours":23.10944111128603,"quality":"inauspicious"},{"name":"Chala","start":"23:07","end":"00:25","startHours":23.10944111128603,"endHours":24.42296654451722,"quality":"neutral"},{"name":"Labha","start":"00:25","end":"01:44","startHours":24.42296654451722,"endHours":25.736491977748408,"quality":"auspicious"},{"name":"Amṛta","start":"01:44","end":"03:03","startHours":25.736491977748408,"endHours":27.050017410979596,"quality":"auspicious"},{"name":"Kāla","start":"03:03","end":"04:22","startHours":27.050017410979596,"endHours":28.363542844210784,"quality":"inauspicious"},{"name":"Śubha","start":"04:22","end":"05:41","startHours":28.363542844210784,"endHours":29.677068277441972,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:41","end":"06:41","startHours":5.677068277441972,"endHours":6.677068277441972,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:41","end":"07:41","startHours":6.677068277441972,"endHours":7.677068277441972,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:41","end":"08:41","startHours":7.677068277441972,"endHours":8.677068277441972,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:41","end":"09:41","startHours":8.677068277441972,"endHours":9.677068277441972,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:41","end":"10:41","startHours":9.677068277441972,"endHours":10.677068277441972,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:41","end":"11:41","startHours":10.677068277441972,"endHours":11.677068277441972,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:41","end":"12:41","startHours":11.677068277441972,"endHours":12.677068277441972,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:41","end":"13:41","startHours":12.677068277441972,"endHours":13.677068277441972,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:41","end":"14:41","startHours":13.677068277441972,"endHours":14.677068277441972,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:41","end":"15:41","startHours":14.677068277441972,"endHours":15.677068277441972,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:41","end":"16:41","startHours":15.677068277441972,"endHours":16.677068277441972,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:41","end":"17:41","startHours":16.677068277441972,"endHours":17.677068277441972,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:41","end":"18:41","startHours":17.677068277441972,"endHours":18.677068277441972,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:41","end":"19:41","startHours":18.677068277441972,"endHours":19.677068277441972,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:41","end":"20:41","startHours":19.677068277441972,"endHours":20.677068277441972,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:41","end":"21:41","startHours":20.677068277441972,"endHours":21.677068277441972,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:41","end":"22:41","startHours":21.677068277441972,"endHours":22.677068277441972,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:41","end":"23:41","startHours":22.677068277441972,"endHours":23.677068277441972,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:41","end":"00:41","startHours":23.677068277441972,"endHours":24.677068277441972,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:41","end":"01:41","startHours":24.677068277441972,"endHours":25.677068277441972,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:41","end":"02:41","startHours":25.677068277441972,"endHours":26.677068277441972,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:41","end":"03:41","startHours":26.677068277441972,"endHours":27.677068277441972,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:41","end":"04:41","startHours":27.677068277441972,"endHours":28.677068277441972,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:41","end":"05:41","startHours":28.677068277441972,"endHours":29.677068277441972,"planetary_lord":"Jupiter"}],"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":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Sushira","quality":"Auspicious"},"drikRitu":"Vasanta (Spring) (Drik)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":14.919088770040807,"eotMinutes":2.918007328966811,"ayanamsa":24.0113}},"calendars":{"vikram_samvat":2068,"vikram_samvatsara":"Krodhi","saka_samvat":1933,"saka_samvatsara":"Khara","bengali_samvat":1418,"malayalam_era":1187,"nanakshahi_year":542,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Kṛṣṇa Trayodaśī · Vikram 2068 Krodhi · Śaka 1933 Khara"},"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":"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":"Meṣa"},"precedence":2},{"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":"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 May 1, 2011 CE · Phoenix, USA · Vidhyamitra","description":"May 1, 2011 CE for Phoenix, USA: Kṛṣṇa Trayodaśī, sūryodaya 05:41, sūryāsta 19:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/2011-05-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/2011-05-01","sa":"https://sa.vidhyamitra.com/city/phoenix/2011-05-01","hi":"https://hi.vidhyamitra.com/city/phoenix/2011-05-01","x-default":"https://vidhyamitra.com/city/phoenix/2011-05-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T17:45:16.893Z","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":"2026-05-15T17:45:16.893Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T17:45:16.893Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}