{"id":"vidhyamitra:city-day:phoenix:2017-12-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/2017-12-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2017-12-18","date_display":"December 18, 2017 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":2017,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458105.770833,"kali_year":5119,"ahargana":1869640.2708,"sun":{"sidereal_longitude":241.7924,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":240.1187,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":358.3263,"elapsed_within_tithi_degrees":10.3263},"nakshatra":{"number":19,"name":"Mūla","pada":1,"moon_longitude":240.1187,"elapsed_within_degrees":0.1187},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":121.9111},"karana":{"half_tithi_index":59,"name":"Nāga"},"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":2017,"month":12,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2458105.770833,"ahargana":1869640.2708,"kali_year":5119,"ayanamsa_lahiri":24.1039,"grahas":{"sun":{"sidereal_longitude":242.19494099999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":239.74264100000005,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false,"latitude":3.7875},"mars":{"sidereal_longitude":191.030441,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":230.79324099999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":200.08904099999995,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":236.62364100000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":245.49164100000007,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":117.4611,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":297.4611,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"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":2017,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458105.770833,"kali_year":5119,"ahargana":1869640.2708,"sun":{"sidereal_longitude":241.7924,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":240.1187,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":358.3263,"elapsed_within_tithi_degrees":10.3263},"nakshatra":{"number":19,"name":"Mūla","pada":1,"moon_longitude":240.1187,"elapsed_within_degrees":0.1187},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":121.9111},"karana":{"half_tithi_index":59,"name":"Nāga"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.787,"elongation":1.674},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.787,"opposition_distance":178.326}},"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":"07:27","sunsetLocal":"17:24","solarNoonLocal":"12:26","dayLengthHours":9.937830893218289,"dayLengthDisplay":"9 Hours 56 Mins 16 Secs","nightLengthDisplay":"14 Hours 03 Mins 44 Secs","moonriseLocal":"07:19","moonsetLocal":"17:13","rahuKala":{"name":"Rāhu Kāla","start":"08:42","end":"09:56","startHours":8.698451292574122,"endHours":9.940680154226408,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:11","end":"12:26","startHours":11.182909015878693,"endHours":12.425137877530979,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:40","end":"14:55","startHours":13.667366739183265,"endHours":14.909595600835551,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:47","end":"10:06","startHours":9.775049639339436,"endHours":10.106310669113379,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:52","end":"08:08","startHours":7.8702987181392645,"endHours":8.135307541958419,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:06","end":"12:45","startHours":12.093876847757036,"endHours":12.756398907304922,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"06:08","end":"06:48","startHours":6.131178311826064,"endHours":6.79370037137395,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:38","end":"07:27","startHours":6.628069856486978,"endHours":7.4562224309218355,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:05","end":"14:45","startHours":14.081443026400695,"endHours":14.743965085948581,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:12","end":"17:36","startHours":17.194053324140125,"endHours":17.594053324140123,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:24","end":"17:48","startHours":17.394053324140124,"endHours":17.808129611357554,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:09","end":"18:54","startHours":17.144053324140124,"endHours":18.894053324140124,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:06","end":"00:45","startHours":24.093876847757034,"endHours":24.756398907304924,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"07:27","end":"08:42","startHours":7.4562224309218355,"endHours":8.698451292574122,"quality":"auspicious"},{"name":"Kāla","start":"08:42","end":"09:56","startHours":8.698451292574122,"endHours":9.940680154226408,"quality":"inauspicious"},{"name":"Śubha","start":"09:56","end":"11:11","startHours":9.940680154226408,"endHours":11.182909015878693,"quality":"auspicious"},{"name":"Roga","start":"11:11","end":"12:26","startHours":11.182909015878693,"endHours":12.425137877530979,"quality":"inauspicious"},{"name":"Udveg","start":"12:26","end":"13:40","startHours":12.425137877530979,"endHours":13.667366739183265,"quality":"inauspicious"},{"name":"Chala","start":"13:40","end":"14:55","startHours":13.667366739183265,"endHours":14.909595600835551,"quality":"neutral"},{"name":"Labha","start":"14:55","end":"16:09","startHours":14.909595600835551,"endHours":16.151824462487838,"quality":"auspicious"},{"name":"Amṛta","start":"16:09","end":"17:24","startHours":16.151824462487838,"endHours":17.394053324140124,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:24","end":"19:09","startHours":17.394053324140124,"endHours":19.151824462487838,"quality":"neutral"},{"name":"Labha","start":"19:09","end":"20:55","startHours":19.151824462487838,"endHours":20.90959560083555,"quality":"auspicious"},{"name":"Amṛta","start":"20:55","end":"22:40","startHours":20.90959560083555,"endHours":22.667366739183265,"quality":"auspicious"},{"name":"Kāla","start":"22:40","end":"00:26","startHours":22.667366739183265,"endHours":24.42513787753098,"quality":"inauspicious"},{"name":"Śubha","start":"00:26","end":"02:11","startHours":24.42513787753098,"endHours":26.182909015878693,"quality":"auspicious"},{"name":"Roga","start":"02:11","end":"03:56","startHours":26.182909015878693,"endHours":27.940680154226406,"quality":"inauspicious"},{"name":"Udveg","start":"03:56","end":"05:42","startHours":27.940680154226406,"endHours":29.69845129257412,"quality":"inauspicious"},{"name":"Chala","start":"05:42","end":"07:27","startHours":29.69845129257412,"endHours":31.456222430921834,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"07:27","end":"08:27","startHours":7.4562224309218355,"endHours":8.456222430921835,"planetary_lord":"Moon"},{"name":"Hora 2","start":"08:27","end":"09:27","startHours":8.456222430921835,"endHours":9.456222430921835,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"09:27","end":"10:27","startHours":9.456222430921835,"endHours":10.456222430921835,"planetary_lord":"Venus"},{"name":"Hora 4","start":"10:27","end":"11:27","startHours":10.456222430921835,"endHours":11.456222430921835,"planetary_lord":"Sun"},{"name":"Hora 5","start":"11:27","end":"12:27","startHours":11.456222430921835,"endHours":12.456222430921835,"planetary_lord":"Mars"},{"name":"Hora 6","start":"12:27","end":"13:27","startHours":12.456222430921835,"endHours":13.456222430921835,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"13:27","end":"14:27","startHours":13.456222430921835,"endHours":14.456222430921835,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"14:27","end":"15:27","startHours":14.456222430921835,"endHours":15.456222430921835,"planetary_lord":"Moon"},{"name":"Hora 9","start":"15:27","end":"16:27","startHours":15.456222430921835,"endHours":16.456222430921834,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"16:27","end":"17:27","startHours":16.456222430921834,"endHours":17.456222430921834,"planetary_lord":"Venus"},{"name":"Hora 11","start":"17:27","end":"18:27","startHours":17.456222430921834,"endHours":18.456222430921834,"planetary_lord":"Sun"},{"name":"Hora 12","start":"18:27","end":"19:27","startHours":18.456222430921834,"endHours":19.456222430921834,"planetary_lord":"Mars"},{"name":"Hora 13","start":"19:27","end":"20:27","startHours":19.456222430921834,"endHours":20.456222430921834,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"20:27","end":"21:27","startHours":20.456222430921834,"endHours":21.456222430921834,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"21:27","end":"22:27","startHours":21.456222430921834,"endHours":22.456222430921834,"planetary_lord":"Moon"},{"name":"Hora 16","start":"22:27","end":"23:27","startHours":22.456222430921834,"endHours":23.456222430921834,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"23:27","end":"00:27","startHours":23.456222430921834,"endHours":24.456222430921834,"planetary_lord":"Venus"},{"name":"Hora 18","start":"00:27","end":"01:27","startHours":24.456222430921834,"endHours":25.456222430921834,"planetary_lord":"Sun"},{"name":"Hora 19","start":"01:27","end":"02:27","startHours":25.456222430921834,"endHours":26.456222430921834,"planetary_lord":"Mars"},{"name":"Hora 20","start":"02:27","end":"03:27","startHours":26.456222430921834,"endHours":27.456222430921834,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"03:27","end":"04:27","startHours":27.456222430921834,"endHours":28.456222430921834,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"04:27","end":"05:27","startHours":28.456222430921834,"endHours":29.456222430921834,"planetary_lord":"Moon"},{"name":"Hora 23","start":"05:27","end":"06:27","startHours":29.456222430921834,"endHours":30.456222430921834,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"06:27","end":"07:27","startHours":30.456222430921834,"endHours":31.456222430921834,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-East","rahuVasa":"North-East","anandadiYoga":{"name":"Gada","quality":"Inauspicious"},"drikRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-23.384706997067884,"eotMinutes":2.787727348141232,"ayanamsa":24.1039}},"calendars":{"vikram_samvat":2074,"vikram_samvatsara":"Sādhāraṇa","saka_samvat":1939,"saka_samvatsara":"Hemalambī","bengali_samvat":1424,"malayalam_era":1193,"nanakshahi_year":548,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Kṛṣṇa Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Kṛṣṇa Amāvasyā · Vikram 2074 Sādhāraṇa · Śaka 1939 Hemalambī"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"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":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Kṛṣṇa Amāvasyā","url":"/day/-3137-10-20","relevance":0.5}]},"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 18, 2017 CE · Phoenix, USA · Vidhyamitra","description":"December 18, 2017 CE for Phoenix, USA: Kṛṣṇa Amāvasyā, sūryodaya 07:27, sūryāsta 17:24.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/2017-12-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/2017-12-18","sa":"https://sa.vidhyamitra.com/city/phoenix/2017-12-18","hi":"https://hi.vidhyamitra.com/city/phoenix/2017-12-18","x-default":"https://vidhyamitra.com/city/phoenix/2017-12-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T17:34:05.385Z","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":"2026-05-15T17:34:05.385Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T17:34:05.385Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}