{"id":"vidhyamitra:city-day:chicago:2016-04-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/2016-04-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2016-04-18","date_display":"April 18, 2016 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":2016,"month":4,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457496.770833,"kali_year":5118,"ahargana":1869031.2708,"sun":{"sidereal_longitude":4.4431,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":136.887,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":132.444,"elapsed_within_tithi_degrees":0.444},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":136.887,"elapsed_within_degrees":3.5537},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":141.3301},"karana":{"half_tithi_index":22,"name":"Bava"},"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":2016,"month":4,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2457496.770833,"ahargana":1869031.2708,"kali_year":5118,"ayanamsa_lahiri":24.0806,"grahas":{"sun":{"sidereal_longitude":4.363608999999997,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":138.815809,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false,"latitude":-0.9992},"mars":{"sidereal_longitude":224.59880899999996,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":23.989409000000023,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":139.19230900000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":true},"venus":{"sidereal_longitude":350.964309,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":231.669709,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":149.7289,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":329.7289,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","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":2016,"month":4,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457496.770833,"kali_year":5118,"ahargana":1869031.2708,"sun":{"sidereal_longitude":4.4431,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":136.887,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":132.444,"elapsed_within_tithi_degrees":0.444},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":136.887,"elapsed_within_degrees":3.5537},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":141.3301},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.999,"elongation":132.444},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.999,"opposition_distance":47.556}},"eclipse_window_40days":[]},"city":{"slug":"chicago","name":"Chicago, USA","lat":41.8781,"lon":-87.6298,"tz_offset_hours":-6,"country":"US","tier":"diaspora"},"tier2":{"city":{"slug":"chicago","name":"Chicago, USA","lat":41.8781,"lon":-87.6298,"tz_offset_hours":-6,"country":"US","tier":"diaspora"},"sunriseLocal":"05:06","sunsetLocal":"18:34","solarNoonLocal":"11:50","dayLengthHours":13.48265512319228,"dayLengthDisplay":"13 Hours 28 Mins 58 Secs","nightLengthDisplay":"10 Hours 31 Mins 02 Secs","moonriseLocal":"14:20","moonsetLocal":"03:15","rahuKala":{"name":"Rāhu Kāla","start":"06:47","end":"08:28","startHours":6.777559613871505,"endHours":8.46289150427054,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:09","end":"11:50","startHours":10.148223394669575,"endHours":11.83355528506861,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:31","end":"15:12","startHours":13.518887175467643,"endHours":15.204219065866681,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:14","end":"08:41","startHours":8.23818058555067,"endHours":8.68760242299041,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:39","end":"06:01","startHours":5.654005020272148,"endHours":6.0135424902239425,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:23","end":"12:17","startHours":11.384133447628866,"endHours":12.282977122508353,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:18","end":"04:12","startHours":3.294540373713499,"endHours":4.193384048592985,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:58","end":"05:06","startHours":3.968673129873113,"endHours":5.09222772347247,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:05","end":"14:59","startHours":14.080664472267323,"endHours":14.979508147146808,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:22","end":"18:46","startHours":18.37488284666475,"endHours":18.77488284666475,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:34","end":"19:08","startHours":18.57488284666475,"endHours":19.13666014346443,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:19","end":"20:04","startHours":18.32488284666475,"endHours":20.07488284666475,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:23","end":"00:17","startHours":23.384133447628866,"endHours":24.282977122508353,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:06","end":"06:47","startHours":5.09222772347247,"endHours":6.777559613871505,"quality":"auspicious"},{"name":"Kāla","start":"06:47","end":"08:28","startHours":6.777559613871505,"endHours":8.46289150427054,"quality":"inauspicious"},{"name":"Śubha","start":"08:28","end":"10:09","startHours":8.46289150427054,"endHours":10.148223394669575,"quality":"auspicious"},{"name":"Roga","start":"10:09","end":"11:50","startHours":10.148223394669575,"endHours":11.83355528506861,"quality":"inauspicious"},{"name":"Udveg","start":"11:50","end":"13:31","startHours":11.83355528506861,"endHours":13.518887175467643,"quality":"inauspicious"},{"name":"Chala","start":"13:31","end":"15:12","startHours":13.518887175467643,"endHours":15.204219065866681,"quality":"neutral"},{"name":"Labha","start":"15:12","end":"16:53","startHours":15.204219065866681,"endHours":16.889550956265715,"quality":"auspicious"},{"name":"Amṛta","start":"16:53","end":"18:34","startHours":16.889550956265715,"endHours":18.57488284666475,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:34","end":"19:53","startHours":18.57488284666475,"endHours":19.889550956265715,"quality":"neutral"},{"name":"Labha","start":"19:53","end":"21:12","startHours":19.889550956265715,"endHours":21.20421906586668,"quality":"auspicious"},{"name":"Amṛta","start":"21:12","end":"22:31","startHours":21.20421906586668,"endHours":22.518887175467643,"quality":"auspicious"},{"name":"Kāla","start":"22:31","end":"23:50","startHours":22.518887175467643,"endHours":23.83355528506861,"quality":"inauspicious"},{"name":"Śubha","start":"23:50","end":"01:09","startHours":23.83355528506861,"endHours":25.148223394669575,"quality":"auspicious"},{"name":"Roga","start":"01:09","end":"02:28","startHours":25.148223394669575,"endHours":26.462891504270537,"quality":"inauspicious"},{"name":"Udveg","start":"02:28","end":"03:47","startHours":26.462891504270537,"endHours":27.777559613871503,"quality":"inauspicious"},{"name":"Chala","start":"03:47","end":"05:06","startHours":27.777559613871503,"endHours":29.09222772347247,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:06","end":"06:06","startHours":5.09222772347247,"endHours":6.09222772347247,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:06","end":"07:06","startHours":6.09222772347247,"endHours":7.09222772347247,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:06","end":"08:06","startHours":7.09222772347247,"endHours":8.092227723472469,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:06","end":"09:06","startHours":8.092227723472469,"endHours":9.092227723472469,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:06","end":"10:06","startHours":9.092227723472469,"endHours":10.092227723472469,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:06","end":"11:06","startHours":10.092227723472469,"endHours":11.092227723472469,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:06","end":"12:06","startHours":11.092227723472469,"endHours":12.092227723472469,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:06","end":"13:06","startHours":12.092227723472469,"endHours":13.092227723472469,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:06","end":"14:06","startHours":13.092227723472469,"endHours":14.092227723472469,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:06","end":"15:06","startHours":14.092227723472469,"endHours":15.092227723472469,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:06","end":"16:06","startHours":15.092227723472469,"endHours":16.09222772347247,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:06","end":"17:06","startHours":16.09222772347247,"endHours":17.09222772347247,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:06","end":"18:06","startHours":17.09222772347247,"endHours":18.09222772347247,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:06","end":"19:06","startHours":18.09222772347247,"endHours":19.09222772347247,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:06","end":"20:06","startHours":19.09222772347247,"endHours":20.09222772347247,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:06","end":"21:06","startHours":20.09222772347247,"endHours":21.09222772347247,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:06","end":"22:06","startHours":21.09222772347247,"endHours":22.09222772347247,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:06","end":"23:06","startHours":22.09222772347247,"endHours":23.09222772347247,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:06","end":"00:06","startHours":23.09222772347247,"endHours":24.09222772347247,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:06","end":"01:06","startHours":24.09222772347247,"endHours":25.09222772347247,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:06","end":"02:06","startHours":25.09222772347247,"endHours":26.09222772347247,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:06","end":"03:06","startHours":26.09222772347247,"endHours":27.09222772347247,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:06","end":"04:06","startHours":27.09222772347247,"endHours":28.09222772347247,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:06","end":"05:06","startHours":28.09222772347247,"endHours":29.09222772347247,"planetary_lord":"Venus"}],"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":"North-East","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"drikRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":10.920168305661761,"eotMinutes":0.5058828958834352,"ayanamsa":24.0806}},"calendars":{"vikram_samvat":2073,"vikram_samvatsara":"Saumya","saka_samvat":1938,"saka_samvatsara":"Durmukhi","bengali_samvat":1423,"malayalam_era":1192,"nanakshahi_year":547,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Dvādaśī · Vikram 2073 Saumya · Śaka 1938 Durmukhi"},"festivals":[{"id":"mesha-sankranti","name":"Meṣa Saṅkrānti (Vaiśākhī / Vishu / Pohelā Boishākh / Bihu)","name_sanskrit":"मेष सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aries; solar new year. Regional: Vaiśākhī (Punjab) · Vishu (Kerala) · Pohelā Boishākh (Bengal) · Bihu (Assam) · Tamil Puthāṇḍu.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":1},{"id":"baisakhi","name":"Baisakhi (Vaiśākhī)","name_sanskrit":"वैशाखी","tradition":"Regional","associated_deity":"Sūrya + Khalsa Pantha (Sikh)","significance":"Punjab New Year + Sikh Khalsa founding day.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":2}],"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":"chicago"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 18, 2016 CE · Chicago, USA · Vidhyamitra","description":"April 18, 2016 CE for Chicago, USA: Śukla Dvādaśī, sūryodaya 05:06, sūryāsta 18:34.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/2016-04-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/2016-04-18","sa":"https://sa.vidhyamitra.com/city/chicago/2016-04-18","hi":"https://hi.vidhyamitra.com/city/chicago/2016-04-18","x-default":"https://vidhyamitra.com/city/chicago/2016-04-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T13:56:43.324Z","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":"2026-05-15T13:56:43.324Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T13:56:43.324Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}