{"id":"vidhyamitra:city-day:phoenix:1981-03-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1981-03-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-03-21","date_display":"March 21, 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":3,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444684.770833,"kali_year":5082,"ahargana":1856219.2708,"sun":{"sidereal_longitude":336.9746,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":163.3401,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":16,"name":"Pratipada","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pratipada","elongation_degrees":186.3655,"elapsed_within_tithi_degrees":6.3655},"nakshatra":{"number":13,"name":"Hasta","pada":2,"moon_longitude":163.3401,"elapsed_within_degrees":3.3401},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":140.3147},"karana":{"half_tithi_index":31,"name":"Kaulava"},"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":1981,"month":3,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444684.770833,"ahargana":1856219.2708,"kali_year":5082,"ayanamsa_lahiri":23.5906,"grahas":{"sun":{"sidereal_longitude":336.752822,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":161.21342200000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false,"latitude":3.6745},"mars":{"sidereal_longitude":339.731022,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":309.976622,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":162.653822,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"venus":{"sidereal_longitude":332.63942199999997,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":163.112622,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":108.5703,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":288.5703,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"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":3,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444684.770833,"kali_year":5082,"ahargana":1856219.2708,"sun":{"sidereal_longitude":336.9746,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":163.3401,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":16,"name":"Pratipada","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pratipada","elongation_degrees":186.3655,"elapsed_within_tithi_degrees":6.3655},"nakshatra":{"number":13,"name":"Hasta","pada":2,"moon_longitude":163.3401,"elapsed_within_degrees":3.3401},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":140.3147},"karana":{"half_tithi_index":31,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.675,"elongation":173.635},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.675,"opposition_distance":6.365}},"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":"06:32","sunsetLocal":"18:40","solarNoonLocal":"12:36","dayLengthHours":12.145147480576908,"dayLengthDisplay":"12 Hours 08 Mins 43 Secs","nightLengthDisplay":"11 Hours 51 Mins 17 Secs","moonriseLocal":"18:56","moonsetLocal":"06:52","rahuKala":{"name":"Rāhu Kāla","start":"09:34","end":"11:05","startHours":9.566026556884564,"endHours":11.084169991956678,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:07","end":"15:38","startHours":14.120456862100905,"endHours":15.638600297173017,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:32","end":"08:03","startHours":6.529739686740337,"endHours":8.04788312181245,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:22","end":"09:46","startHours":9.363607432208282,"endHours":9.768445681560845,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:02","end":"07:22","startHours":7.035787498431041,"endHours":7.359658097913092,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:12","end":"13:00","startHours":12.197475177676226,"endHours":13.007151676381353,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:55","end":"05:43","startHours":4.910386689330083,"endHours":5.720063188035209,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:31","end":"06:32","startHours":5.517644063358928,"endHours":6.529739686740337,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:38","end":"15:26","startHours":14.626504673791608,"endHours":15.436181172496735,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:28","end":"18:52","startHours":18.474887167317245,"endHours":18.874887167317244,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:40","end":"19:11","startHours":18.674887167317245,"endHours":19.180934979007947,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:25","end":"20:10","startHours":18.424887167317245,"endHours":20.174887167317245,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:12","end":"01:00","startHours":24.197475177676225,"endHours":25.007151676381355,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:32","end":"08:03","startHours":6.529739686740337,"endHours":8.04788312181245,"quality":"inauspicious"},{"name":"Śubha","start":"08:03","end":"09:34","startHours":8.04788312181245,"endHours":9.566026556884564,"quality":"auspicious"},{"name":"Roga","start":"09:34","end":"11:05","startHours":9.566026556884564,"endHours":11.084169991956678,"quality":"inauspicious"},{"name":"Udveg","start":"11:05","end":"12:36","startHours":11.084169991956678,"endHours":12.60231342702879,"quality":"inauspicious"},{"name":"Chala","start":"12:36","end":"14:07","startHours":12.60231342702879,"endHours":14.120456862100905,"quality":"neutral"},{"name":"Labha","start":"14:07","end":"15:38","startHours":14.120456862100905,"endHours":15.638600297173017,"quality":"auspicious"},{"name":"Amṛta","start":"15:38","end":"17:09","startHours":15.638600297173017,"endHours":17.156743732245133,"quality":"auspicious"},{"name":"Kāla","start":"17:09","end":"18:40","startHours":17.156743732245133,"endHours":18.674887167317245,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:40","end":"20:09","startHours":18.674887167317245,"endHours":20.156743732245133,"quality":"auspicious"},{"name":"Amṛta","start":"20:09","end":"21:38","startHours":20.156743732245133,"endHours":21.638600297173017,"quality":"auspicious"},{"name":"Kāla","start":"21:38","end":"23:07","startHours":21.638600297173017,"endHours":23.120456862100905,"quality":"inauspicious"},{"name":"Śubha","start":"23:07","end":"00:36","startHours":23.120456862100905,"endHours":24.60231342702879,"quality":"auspicious"},{"name":"Roga","start":"00:36","end":"02:05","startHours":24.60231342702879,"endHours":26.084169991956678,"quality":"inauspicious"},{"name":"Udveg","start":"02:05","end":"03:34","startHours":26.084169991956678,"endHours":27.566026556884566,"quality":"inauspicious"},{"name":"Chala","start":"03:34","end":"05:03","startHours":27.566026556884566,"endHours":29.04788312181245,"quality":"neutral"},{"name":"Labha","start":"05:03","end":"06:32","startHours":29.04788312181245,"endHours":30.529739686740335,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:32","end":"07:32","startHours":6.529739686740337,"endHours":7.529739686740337,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:32","end":"08:32","startHours":7.529739686740337,"endHours":8.529739686740337,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:32","end":"09:32","startHours":8.529739686740337,"endHours":9.529739686740337,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:32","end":"10:32","startHours":9.529739686740337,"endHours":10.529739686740337,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:32","end":"11:32","startHours":10.529739686740337,"endHours":11.529739686740337,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:32","end":"12:32","startHours":11.529739686740337,"endHours":12.529739686740337,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:32","end":"13:32","startHours":12.529739686740337,"endHours":13.529739686740337,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:32","end":"14:32","startHours":13.529739686740337,"endHours":14.529739686740337,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:32","end":"15:32","startHours":14.529739686740337,"endHours":15.529739686740337,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:32","end":"16:32","startHours":15.529739686740337,"endHours":16.529739686740335,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:32","end":"17:32","startHours":16.529739686740335,"endHours":17.529739686740335,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:32","end":"18:32","startHours":17.529739686740335,"endHours":18.529739686740335,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:32","end":"19:32","startHours":18.529739686740335,"endHours":19.529739686740335,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:32","end":"20:32","startHours":19.529739686740335,"endHours":20.529739686740335,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:32","end":"21:32","startHours":20.529739686740335,"endHours":21.529739686740335,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:32","end":"22:32","startHours":21.529739686740335,"endHours":22.529739686740335,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:32","end":"23:32","startHours":22.529739686740335,"endHours":23.529739686740335,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:32","end":"00:32","startHours":23.529739686740335,"endHours":24.529739686740335,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:32","end":"01:32","startHours":24.529739686740335,"endHours":25.529739686740335,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:32","end":"02:32","startHours":25.529739686740335,"endHours":26.529739686740335,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:32","end":"03:32","startHours":26.529739686740335,"endHours":27.529739686740335,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:32","end":"04:32","startHours":27.529739686740335,"endHours":28.529739686740335,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:32","end":"05:32","startHours":28.529739686740335,"endHours":29.529739686740335,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:32","end":"06:32","startHours":29.529739686740335,"endHours":30.529739686740335,"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":0.1365893887965726,"eotMinutes":-7.842805621727393,"ayanamsa":23.5906}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Phālguna","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 Kṛṣṇa Pratipada · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"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":"phoenix"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga March 21, 1981 CE · Phoenix, USA · Vidhyamitra","description":"March 21, 1981 CE for Phoenix, USA: Kṛṣṇa Pratipada, sūryodaya 06:32, sūryāsta 18:40.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1981-03-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1981-03-21","sa":"https://sa.vidhyamitra.com/city/phoenix/1981-03-21","hi":"https://hi.vidhyamitra.com/city/phoenix/1981-03-21","x-default":"https://vidhyamitra.com/city/phoenix/1981-03-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T10:36:54.684Z","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":"2026-05-31T10:36:54.684Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T10:36:54.684Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}