{"id":"vidhyamitra:city-day:phoenix:1987-12-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1987-12-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1987-12-01","date_display":"December 1, 1987 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":1987,"month":12,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447130.770833,"kali_year":5089,"ahargana":1858665.2708,"sun":{"sidereal_longitude":224.139,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":352.1789,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":128.0399,"elapsed_within_tithi_degrees":8.0399},"nakshatra":{"number":27,"name":"Revatī","pada":2,"moon_longitude":352.1789,"elapsed_within_degrees":5.5122},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":216.3179},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1987,"month":12,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2447130.770833,"ahargana":1858665.2708,"kali_year":5089,"ayanamsa_lahiri":23.6842,"grahas":{"sun":{"sidereal_longitude":224.61436600000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":352.942466,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false,"latitude":1.0273},"mars":{"sidereal_longitude":191.00176599999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":212.48726599999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":357.128366,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":250.18136600000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":237.81296599999996,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":338.9694,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":158.9694,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","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":1987,"month":12,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447130.770833,"kali_year":5089,"ahargana":1858665.2708,"sun":{"sidereal_longitude":224.139,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":352.1789,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":128.0399,"elapsed_within_tithi_degrees":8.0399},"nakshatra":{"number":27,"name":"Revatī","pada":2,"moon_longitude":352.1789,"elapsed_within_degrees":5.5122},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":216.3179},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.027,"elongation":128.04},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.027,"opposition_distance":51.96}},"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":"07:15","sunsetLocal":"17:22","solarNoonLocal":"12:18","dayLengthHours":10.117267557462483,"dayLengthDisplay":"10 Hours 07 Mins 02 Secs","nightLengthDisplay":"13 Hours 52 Mins 58 Secs","moonriseLocal":"14:31","moonsetLocal":"03:12","rahuKala":{"name":"Rāhu Kāla","start":"14:50","end":"16:06","startHours":14.832066046025613,"endHours":16.09672449070842,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:46","end":"11:02","startHours":9.773432267294371,"endHours":11.03809071197718,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:18","end":"13:34","startHours":12.302749156659992,"endHours":13.5674076013428,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:36","end":"09:57","startHours":9.604811141336661,"endHours":9.942053393252078,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:40","end":"07:56","startHours":7.66566819282302,"endHours":7.935461994355353,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:58","end":"12:38","startHours":11.965506904744576,"endHours":12.639991408575408,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:54","end":"06:34","startHours":5.895146370267085,"endHours":6.569630874097918,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:24","end":"07:15","startHours":6.4010097481402095,"endHours":7.2441153779287495,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:59","end":"14:40","startHours":13.988960416237072,"endHours":14.663444920067905,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:10","end":"17:34","startHours":17.161382935391234,"endHours":17.561382935391233,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:22","end":"17:47","startHours":17.361382935391234,"endHours":17.782935750285503,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:07","end":"18:52","startHours":17.111382935391234,"endHours":18.861382935391234,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:58","end":"00:38","startHours":23.965506904744576,"endHours":24.63999140857541,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"07:15","end":"08:31","startHours":7.2441153779287495,"endHours":8.508773822611559,"quality":"inauspicious"},{"name":"Udveg","start":"08:31","end":"09:46","startHours":8.508773822611559,"endHours":9.773432267294371,"quality":"inauspicious"},{"name":"Chala","start":"09:46","end":"11:02","startHours":9.773432267294371,"endHours":11.03809071197718,"quality":"neutral"},{"name":"Labha","start":"11:02","end":"12:18","startHours":11.03809071197718,"endHours":12.302749156659992,"quality":"auspicious"},{"name":"Amṛta","start":"12:18","end":"13:34","startHours":12.302749156659992,"endHours":13.5674076013428,"quality":"auspicious"},{"name":"Kāla","start":"13:34","end":"14:50","startHours":13.5674076013428,"endHours":14.832066046025613,"quality":"inauspicious"},{"name":"Śubha","start":"14:50","end":"16:06","startHours":14.832066046025613,"endHours":16.09672449070842,"quality":"auspicious"},{"name":"Roga","start":"16:06","end":"17:22","startHours":16.09672449070842,"endHours":17.361382935391234,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:22","end":"19:06","startHours":17.361382935391234,"endHours":19.096724490708425,"quality":"inauspicious"},{"name":"Śubha","start":"19:06","end":"20:50","startHours":19.096724490708425,"endHours":20.832066046025613,"quality":"auspicious"},{"name":"Roga","start":"20:50","end":"22:34","startHours":20.832066046025613,"endHours":22.5674076013428,"quality":"inauspicious"},{"name":"Udveg","start":"22:34","end":"00:18","startHours":22.5674076013428,"endHours":24.302749156659992,"quality":"inauspicious"},{"name":"Chala","start":"00:18","end":"02:02","startHours":24.302749156659992,"endHours":26.038090711977183,"quality":"neutral"},{"name":"Labha","start":"02:02","end":"03:46","startHours":26.038090711977183,"endHours":27.77343226729437,"quality":"auspicious"},{"name":"Amṛta","start":"03:46","end":"05:31","startHours":27.77343226729437,"endHours":29.50877382261156,"quality":"auspicious"},{"name":"Kāla","start":"05:31","end":"07:15","startHours":29.50877382261156,"endHours":31.24411537792875,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:15","end":"08:15","startHours":7.2441153779287495,"endHours":8.24411537792875,"planetary_lord":"Mars"},{"name":"Hora 2","start":"08:15","end":"09:15","startHours":8.24411537792875,"endHours":9.24411537792875,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"09:15","end":"10:15","startHours":9.24411537792875,"endHours":10.24411537792875,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"10:15","end":"11:15","startHours":10.24411537792875,"endHours":11.24411537792875,"planetary_lord":"Moon"},{"name":"Hora 5","start":"11:15","end":"12:15","startHours":11.24411537792875,"endHours":12.24411537792875,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"12:15","end":"13:15","startHours":12.24411537792875,"endHours":13.24411537792875,"planetary_lord":"Venus"},{"name":"Hora 7","start":"13:15","end":"14:15","startHours":13.24411537792875,"endHours":14.24411537792875,"planetary_lord":"Sun"},{"name":"Hora 8","start":"14:15","end":"15:15","startHours":14.24411537792875,"endHours":15.24411537792875,"planetary_lord":"Mars"},{"name":"Hora 9","start":"15:15","end":"16:15","startHours":15.24411537792875,"endHours":16.24411537792875,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"16:15","end":"17:15","startHours":16.24411537792875,"endHours":17.24411537792875,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"17:15","end":"18:15","startHours":17.24411537792875,"endHours":18.24411537792875,"planetary_lord":"Moon"},{"name":"Hora 12","start":"18:15","end":"19:15","startHours":18.24411537792875,"endHours":19.24411537792875,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"19:15","end":"20:15","startHours":19.24411537792875,"endHours":20.24411537792875,"planetary_lord":"Venus"},{"name":"Hora 14","start":"20:15","end":"21:15","startHours":20.24411537792875,"endHours":21.24411537792875,"planetary_lord":"Sun"},{"name":"Hora 15","start":"21:15","end":"22:15","startHours":21.24411537792875,"endHours":22.24411537792875,"planetary_lord":"Mars"},{"name":"Hora 16","start":"22:15","end":"23:15","startHours":22.24411537792875,"endHours":23.24411537792875,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"23:15","end":"00:15","startHours":23.24411537792875,"endHours":24.24411537792875,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"00:15","end":"01:15","startHours":24.24411537792875,"endHours":25.24411537792875,"planetary_lord":"Moon"},{"name":"Hora 19","start":"01:15","end":"02:15","startHours":25.24411537792875,"endHours":26.24411537792875,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"02:15","end":"03:15","startHours":26.24411537792875,"endHours":27.24411537792875,"planetary_lord":"Venus"},{"name":"Hora 21","start":"03:15","end":"04:15","startHours":27.24411537792875,"endHours":28.24411537792875,"planetary_lord":"Sun"},{"name":"Hora 22","start":"04:15","end":"05:15","startHours":28.24411537792875,"endHours":29.24411537792875,"planetary_lord":"Mars"},{"name":"Hora 23","start":"05:15","end":"06:15","startHours":29.24411537792875,"endHours":30.24411537792875,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"06:15","end":"07:15","startHours":30.24411537792875,"endHours":31.24411537792875,"planetary_lord":"Saturn"}],"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":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Dhvaja","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-21.68740507292997,"eotMinutes":10.131050600400467,"ayanamsa":23.6842}},"calendars":{"vikram_samvat":2044,"vikram_samvatsara":"Vikrama","saka_samvat":1909,"saka_samvatsara":"Prabhava","bengali_samvat":1394,"malayalam_era":1163,"nanakshahi_year":518,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Ekādaśī · Vikram 2044 Vikrama · Śaka 1909 Prabhava"},"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}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — 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 1, 1987 CE · Phoenix, USA · Vidhyamitra","description":"December 1, 1987 CE for Phoenix, USA: Śukla Ekādaśī, sūryodaya 07:15, sūryāsta 17:22.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1987-12-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1987-12-01","sa":"https://sa.vidhyamitra.com/city/phoenix/1987-12-01","hi":"https://hi.vidhyamitra.com/city/phoenix/1987-12-01","x-default":"https://vidhyamitra.com/city/phoenix/1987-12-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T22:09:14.466Z","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":"2026-06-01T22:09:14.466Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T22:09:14.466Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}