{"id":"vidhyamitra:city-day:phoenix:1981-01-24:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1981-01-24","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-01-24","date_display":"January 24, 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":1,"day":24,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444628.770833,"kali_year":5082,"ahargana":1856163.2708,"sun":{"sidereal_longitude":280.3879,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":146.5117,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":226.1238,"elapsed_within_tithi_degrees":10.1238},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4,"moon_longitude":146.5117,"elapsed_within_degrees":13.1784},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":66.8996},"karana":{"half_tithi_index":37,"name":"Bālava"},"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":1,"day":24,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444628.770833,"ahargana":1856163.2708,"kali_year":5082,"ayanamsa_lahiri":23.5885,"grahas":{"sun":{"sidereal_longitude":280.38136099999997,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"moon":{"sidereal_longitude":144.80936100000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false,"latitude":2.5777},"mars":{"sidereal_longitude":295.717361,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":295.71716100000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":166.85076100000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"venus":{"sidereal_longitude":262.65286100000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":165.94006100000001,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":111.5374,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":291.5374,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1,"day":24,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444628.770833,"kali_year":5082,"ahargana":1856163.2708,"sun":{"sidereal_longitude":280.3879,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":146.5117,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":226.1238,"elapsed_within_tithi_degrees":10.1238},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4,"moon_longitude":146.5117,"elapsed_within_degrees":13.1784},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":66.8996},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.578,"elongation":133.876},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.578,"opposition_distance":46.124}},"eclipse_window_40days":[{"offset_days":-4,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776},{"offset_days":12,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"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":"07:29","sunsetLocal":"17:51","solarNoonLocal":"12:40","dayLengthHours":10.365250667839497,"dayLengthDisplay":"10 Hours 21 Mins 55 Secs","nightLengthDisplay":"13 Hours 38 Mins 05 Secs","moonriseLocal":"21:23","moonsetLocal":"09:53","rahuKala":{"name":"Rāhu Kāla","start":"10:05","end":"11:23","startHours":10.081334079482204,"endHours":11.37699041296214,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:58","end":"15:16","startHours":13.968303079922014,"endHours":15.263959413401953,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:29","end":"08:47","startHours":7.490021412522329,"endHours":8.785677746002266,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:55","end":"10:15","startHours":9.908579901684877,"endHours":10.254088257279529,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:55","end":"08:12","startHours":7.9219068570156415,"endHours":8.19831354149136,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:20","end":"13:01","startHours":12.327138390847427,"endHours":13.018155102036726,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"06:06","end":"06:48","startHours":6.107987990143729,"endHours":6.799004701333029,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:38","end":"07:29","startHours":6.626250523535704,"endHours":7.490021412522329,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:24","end":"15:05","startHours":14.400188524415327,"endHours":15.091205235604628,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:39","end":"18:03","startHours":17.655272080361826,"endHours":18.055272080361824,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:51","end":"18:17","startHours":17.855272080361825,"endHours":18.287157524855136,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:36","end":"19:21","startHours":17.605272080361825,"endHours":19.355272080361825,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:20","end":"01:01","startHours":24.327138390847427,"endHours":25.018155102036726,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"07:29","end":"08:47","startHours":7.490021412522329,"endHours":8.785677746002266,"quality":"inauspicious"},{"name":"Śubha","start":"08:47","end":"10:05","startHours":8.785677746002266,"endHours":10.081334079482204,"quality":"auspicious"},{"name":"Roga","start":"10:05","end":"11:23","startHours":10.081334079482204,"endHours":11.37699041296214,"quality":"inauspicious"},{"name":"Udveg","start":"11:23","end":"12:40","startHours":11.37699041296214,"endHours":12.672646746442076,"quality":"inauspicious"},{"name":"Chala","start":"12:40","end":"13:58","startHours":12.672646746442076,"endHours":13.968303079922014,"quality":"neutral"},{"name":"Labha","start":"13:58","end":"15:16","startHours":13.968303079922014,"endHours":15.263959413401953,"quality":"auspicious"},{"name":"Amṛta","start":"15:16","end":"16:34","startHours":15.263959413401953,"endHours":16.55961574688189,"quality":"auspicious"},{"name":"Kāla","start":"16:34","end":"17:51","startHours":16.55961574688189,"endHours":17.855272080361825,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:51","end":"19:34","startHours":17.855272080361825,"endHours":19.55961574688189,"quality":"auspicious"},{"name":"Amṛta","start":"19:34","end":"21:16","startHours":19.55961574688189,"endHours":21.26395941340195,"quality":"auspicious"},{"name":"Kāla","start":"21:16","end":"22:58","startHours":21.26395941340195,"endHours":22.968303079922013,"quality":"inauspicious"},{"name":"Śubha","start":"22:58","end":"00:40","startHours":22.968303079922013,"endHours":24.672646746442076,"quality":"auspicious"},{"name":"Roga","start":"00:40","end":"02:23","startHours":24.672646746442076,"endHours":26.37699041296214,"quality":"inauspicious"},{"name":"Udveg","start":"02:23","end":"04:05","startHours":26.37699041296214,"endHours":28.081334079482204,"quality":"inauspicious"},{"name":"Chala","start":"04:05","end":"05:47","startHours":28.081334079482204,"endHours":29.785677746002264,"quality":"neutral"},{"name":"Labha","start":"05:47","end":"07:29","startHours":29.785677746002264,"endHours":31.490021412522328,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:29","end":"08:29","startHours":7.490021412522329,"endHours":8.490021412522328,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"08:29","end":"09:29","startHours":8.490021412522328,"endHours":9.490021412522328,"planetary_lord":"Moon"},{"name":"Hora 3","start":"09:29","end":"10:29","startHours":9.490021412522328,"endHours":10.490021412522328,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"10:29","end":"11:29","startHours":10.490021412522328,"endHours":11.490021412522328,"planetary_lord":"Venus"},{"name":"Hora 5","start":"11:29","end":"12:29","startHours":11.490021412522328,"endHours":12.490021412522328,"planetary_lord":"Sun"},{"name":"Hora 6","start":"12:29","end":"13:29","startHours":12.490021412522328,"endHours":13.490021412522328,"planetary_lord":"Mars"},{"name":"Hora 7","start":"13:29","end":"14:29","startHours":13.490021412522328,"endHours":14.490021412522328,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"14:29","end":"15:29","startHours":14.490021412522328,"endHours":15.490021412522328,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"15:29","end":"16:29","startHours":15.490021412522328,"endHours":16.490021412522328,"planetary_lord":"Moon"},{"name":"Hora 10","start":"16:29","end":"17:29","startHours":16.490021412522328,"endHours":17.490021412522328,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"17:29","end":"18:29","startHours":17.490021412522328,"endHours":18.490021412522328,"planetary_lord":"Venus"},{"name":"Hora 12","start":"18:29","end":"19:29","startHours":18.490021412522328,"endHours":19.490021412522328,"planetary_lord":"Sun"},{"name":"Hora 13","start":"19:29","end":"20:29","startHours":19.490021412522328,"endHours":20.490021412522328,"planetary_lord":"Mars"},{"name":"Hora 14","start":"20:29","end":"21:29","startHours":20.490021412522328,"endHours":21.490021412522328,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"21:29","end":"22:29","startHours":21.490021412522328,"endHours":22.490021412522328,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"22:29","end":"23:29","startHours":22.490021412522328,"endHours":23.490021412522328,"planetary_lord":"Moon"},{"name":"Hora 17","start":"23:29","end":"00:29","startHours":23.490021412522328,"endHours":24.490021412522328,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"00:29","end":"01:29","startHours":24.490021412522328,"endHours":25.490021412522328,"planetary_lord":"Venus"},{"name":"Hora 19","start":"01:29","end":"02:29","startHours":25.490021412522328,"endHours":26.490021412522328,"planetary_lord":"Sun"},{"name":"Hora 20","start":"02:29","end":"03:29","startHours":26.490021412522328,"endHours":27.490021412522328,"planetary_lord":"Mars"},{"name":"Hora 21","start":"03:29","end":"04:29","startHours":27.490021412522328,"endHours":28.490021412522328,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"04:29","end":"05:29","startHours":28.490021412522328,"endHours":29.490021412522328,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"05:29","end":"06:29","startHours":29.490021412522328,"endHours":30.490021412522328,"planetary_lord":"Moon"},{"name":"Hora 24","start":"06:29","end":"07:29","startHours":30.490021412522328,"endHours":31.490021412522328,"planetary_lord":"Mercury"}],"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":"East (Pūrva)","chandraVasa":"West","rahuVasa":"East","anandadiYoga":{"name":"Dhvaja","quality":"Auspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-19.259798887944363,"eotMinutes":-12.062804786524666,"ayanamsa":23.5885}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Caturthī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2},{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"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 January 24, 1981 CE · Phoenix, USA · Vidhyamitra","description":"January 24, 1981 CE for Phoenix, USA: Kṛṣṇa Caturthī, sūryodaya 07:29, sūryāsta 17:51.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1981-01-24","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1981-01-24","sa":"https://sa.vidhyamitra.com/city/phoenix/1981-01-24","hi":"https://hi.vidhyamitra.com/city/phoenix/1981-01-24","x-default":"https://vidhyamitra.com/city/phoenix/1981-01-24"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T15:04:03.289Z","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":"2026-05-18T15:04:03.290Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T15:04:03.290Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}