{"id":"vidhyamitra:city-day:phoenix:1981-12-07:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1981-12-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-12-07","date_display":"December 7, 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":12,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444945.770833,"kali_year":5083,"ahargana":1856480.2708,"sun":{"sidereal_longitude":230.8382,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":353.7597,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":122.9215,"elapsed_within_tithi_degrees":2.9215},"nakshatra":{"number":27,"name":"Revatī","pada":3,"moon_longitude":353.7597,"elapsed_within_degrees":7.093},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":224.5979},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":12,"day":7,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444945.770833,"ahargana":1856480.2708,"kali_year":5083,"ayanamsa_lahiri":23.6006,"grahas":{"sun":{"sidereal_longitude":231.24714900000004,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":350.949949,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false,"latitude":-4.4174},"mars":{"sidereal_longitude":152.28524900000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":229.46864900000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":188.708749,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":275.391349,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":175.79404899999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":94.7412,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":274.7412,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":12,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444945.770833,"kali_year":5083,"ahargana":1856480.2708,"sun":{"sidereal_longitude":230.8382,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":353.7597,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":122.9215,"elapsed_within_tithi_degrees":2.9215},"nakshatra":{"number":27,"name":"Revatī","pada":3,"moon_longitude":353.7597,"elapsed_within_degrees":7.093},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":224.5979},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.417,"elongation":122.922},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.417,"opposition_distance":57.078}},"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":"07:20","sunsetLocal":"17:21","solarNoonLocal":"12:21","dayLengthHours":10.02402221515269,"dayLengthDisplay":"10 Hours 01 Mins 26 Secs","nightLengthDisplay":"13 Hours 58 Mins 34 Secs","moonriseLocal":"14:01","moonsetLocal":"02:37","rahuKala":{"name":"Rāhu Kāla","start":"08:35","end":"09:50","startHours":8.583863393928784,"endHours":9.83686617082287,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:05","end":"12:21","startHours":11.089868947716957,"endHours":12.342871724611044,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:36","end":"14:51","startHours":13.59587450150513,"endHours":14.848877278399215,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:40","end":"10:00","startHours":9.669799133903659,"endHours":10.003933207742081,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:45","end":"08:01","startHours":7.748528209332727,"endHours":8.015835468403465,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:01","end":"12:41","startHours":12.008737650772622,"endHours":12.677005798449466,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"06:00","end":"06:40","startHours":5.994324321681005,"endHours":6.662592469357851,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:30","end":"07:20","startHours":6.49552543243864,"endHours":7.3308606170346975,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:01","end":"14:41","startHours":14.013542093803158,"endHours":14.681810241480004,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:09","end":"17:33","startHours":17.15488283218739,"endHours":17.55488283218739,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:21","end":"17:46","startHours":17.35488283218739,"endHours":17.772550424485416,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:06","end":"18:51","startHours":17.10488283218739,"endHours":18.85488283218739,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:01","end":"00:41","startHours":24.00873765077262,"endHours":24.677005798449468,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"07:20","end":"08:35","startHours":7.3308606170346975,"endHours":8.583863393928784,"quality":"auspicious"},{"name":"Kāla","start":"08:35","end":"09:50","startHours":8.583863393928784,"endHours":9.83686617082287,"quality":"inauspicious"},{"name":"Śubha","start":"09:50","end":"11:05","startHours":9.83686617082287,"endHours":11.089868947716957,"quality":"auspicious"},{"name":"Roga","start":"11:05","end":"12:21","startHours":11.089868947716957,"endHours":12.342871724611044,"quality":"inauspicious"},{"name":"Udveg","start":"12:21","end":"13:36","startHours":12.342871724611044,"endHours":13.59587450150513,"quality":"inauspicious"},{"name":"Chala","start":"13:36","end":"14:51","startHours":13.59587450150513,"endHours":14.848877278399215,"quality":"neutral"},{"name":"Labha","start":"14:51","end":"16:06","startHours":14.848877278399215,"endHours":16.101880055293304,"quality":"auspicious"},{"name":"Amṛta","start":"16:06","end":"17:21","startHours":16.101880055293304,"endHours":17.35488283218739,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:21","end":"19:06","startHours":17.35488283218739,"endHours":19.101880055293304,"quality":"neutral"},{"name":"Labha","start":"19:06","end":"20:51","startHours":19.101880055293304,"endHours":20.848877278399215,"quality":"auspicious"},{"name":"Amṛta","start":"20:51","end":"22:36","startHours":20.848877278399215,"endHours":22.59587450150513,"quality":"auspicious"},{"name":"Kāla","start":"22:36","end":"00:21","startHours":22.59587450150513,"endHours":24.342871724611044,"quality":"inauspicious"},{"name":"Śubha","start":"00:21","end":"02:05","startHours":24.342871724611044,"endHours":26.08986894771696,"quality":"auspicious"},{"name":"Roga","start":"02:05","end":"03:50","startHours":26.08986894771696,"endHours":27.836866170822873,"quality":"inauspicious"},{"name":"Udveg","start":"03:50","end":"05:35","startHours":27.836866170822873,"endHours":29.583863393928784,"quality":"inauspicious"},{"name":"Chala","start":"05:35","end":"07:20","startHours":29.583863393928784,"endHours":31.3308606170347,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"07:20","end":"08:20","startHours":7.3308606170346975,"endHours":8.330860617034698,"planetary_lord":"Moon"},{"name":"Hora 2","start":"08:20","end":"09:20","startHours":8.330860617034698,"endHours":9.330860617034698,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"09:20","end":"10:20","startHours":9.330860617034698,"endHours":10.330860617034698,"planetary_lord":"Venus"},{"name":"Hora 4","start":"10:20","end":"11:20","startHours":10.330860617034698,"endHours":11.330860617034698,"planetary_lord":"Sun"},{"name":"Hora 5","start":"11:20","end":"12:20","startHours":11.330860617034698,"endHours":12.330860617034698,"planetary_lord":"Mars"},{"name":"Hora 6","start":"12:20","end":"13:20","startHours":12.330860617034698,"endHours":13.330860617034698,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"13:20","end":"14:20","startHours":13.330860617034698,"endHours":14.330860617034698,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"14:20","end":"15:20","startHours":14.330860617034698,"endHours":15.330860617034698,"planetary_lord":"Moon"},{"name":"Hora 9","start":"15:20","end":"16:20","startHours":15.330860617034698,"endHours":16.3308606170347,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"16:20","end":"17:20","startHours":16.3308606170347,"endHours":17.3308606170347,"planetary_lord":"Venus"},{"name":"Hora 11","start":"17:20","end":"18:20","startHours":17.3308606170347,"endHours":18.3308606170347,"planetary_lord":"Sun"},{"name":"Hora 12","start":"18:20","end":"19:20","startHours":18.3308606170347,"endHours":19.3308606170347,"planetary_lord":"Mars"},{"name":"Hora 13","start":"19:20","end":"20:20","startHours":19.3308606170347,"endHours":20.3308606170347,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"20:20","end":"21:20","startHours":20.3308606170347,"endHours":21.3308606170347,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"21:20","end":"22:20","startHours":21.3308606170347,"endHours":22.3308606170347,"planetary_lord":"Moon"},{"name":"Hora 16","start":"22:20","end":"23:20","startHours":22.3308606170347,"endHours":23.3308606170347,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"23:20","end":"00:20","startHours":23.3308606170347,"endHours":24.3308606170347,"planetary_lord":"Venus"},{"name":"Hora 18","start":"00:20","end":"01:20","startHours":24.3308606170347,"endHours":25.3308606170347,"planetary_lord":"Sun"},{"name":"Hora 19","start":"01:20","end":"02:20","startHours":25.3308606170347,"endHours":26.3308606170347,"planetary_lord":"Mars"},{"name":"Hora 20","start":"02:20","end":"03:20","startHours":26.3308606170347,"endHours":27.3308606170347,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"03:20","end":"04:20","startHours":27.3308606170347,"endHours":28.3308606170347,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"04:20","end":"05:20","startHours":28.3308606170347,"endHours":29.3308606170347,"planetary_lord":"Moon"},{"name":"Hora 23","start":"05:20","end":"06:20","startHours":29.3308606170347,"endHours":30.3308606170347,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"06:20","end":"07:20","startHours":30.3308606170347,"endHours":31.3308606170347,"planetary_lord":"Venus"}],"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":"East (Pūrva)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Dhūmra","quality":"Inauspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Śarad (Autumn)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-22.575787916633296,"eotMinutes":7.723696523337262,"ayanamsa":23.6006}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Ekādaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"gita-jayanti","name":"Gītā Jayantī (= Mokṣadā Ekādaśī)","name_sanskrit":"गीता जयन्ती","tradition":"Vaishnava","associated_deity":"Krishna (Bhagavad-Gītā speaker)","significance":"Day Bhagavad Gītā was delivered at Kurukṣetra (Mahābhārata Day 1).","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":1,"related_chart":"krishna","historical_anchor":{"event":"Bhagavad Gītā delivered at Kurukṣetra (Mahābhārata Day 1)","date_julian":"-3137-10-04","location":"Kurukṣetra"},"sources":["Bhagavad Gītā (Mahābhārata, Bhīṣma Parva)"]},{"id":"vaikuntha-ekadashi","name":"Vaikuṇṭha Ekādaśī","name_sanskrit":"वैकुण्ठ एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Most sacred Ekādaśī of the year; 'Vaikuṇṭha-dvāram udghaṭitam'.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":2},{"id":"mokshada-ekadashi","name":"Mokṣadā Ekādaśī (Gītā Jayantī)","name_sanskrit":"मोक्षदा एकादशी / गीता जयन्ती","tradition":"Vaishnava","associated_deity":"Krishna (Bhagavad Gītā delivery)","significance":"Day Bhagavad Gītā was delivered at Kurukṣetra.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":3},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5},{"id":"vrischika-sankranti","name":"Vṛścika Saṅkrānti","name_sanskrit":"वृश्चिक सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Scorpio.","vrata":false,"detection":{"sun_rashi":"Vṛścika"},"precedence":5}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — 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 December 7, 1981 CE · Phoenix, USA · Vidhyamitra","description":"December 7, 1981 CE for Phoenix, USA: Śukla Ekādaśī, sūryodaya 07:20, sūryāsta 17:21.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1981-12-07","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1981-12-07","sa":"https://sa.vidhyamitra.com/city/phoenix/1981-12-07","hi":"https://hi.vidhyamitra.com/city/phoenix/1981-12-07","x-default":"https://vidhyamitra.com/city/phoenix/1981-12-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T13:14:41.308Z","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":"2026-05-18T13:14:41.308Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T13:14:41.308Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}