{"id":"vidhyamitra:city-day:chicago:2012-04-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/2012-04-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2012-04-01","date_display":"April 1, 2012 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":2012,"month":4,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2456018.770833,"kali_year":5113,"ahargana":1867553.2708,"sun":{"sidereal_longitude":347.8311,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":94.8739,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":107.0428,"elapsed_within_tithi_degrees":11.0428},"nakshatra":{"number":8,"name":"Puṣya","pada":1,"moon_longitude":94.8739,"elapsed_within_degrees":1.5405},"yoga":{"number":7,"name":"Sukarma","sum_longitude":82.7049},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":2012,"month":4,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2456018.770833,"ahargana":1867553.2708,"kali_year":5113,"ayanamsa_lahiri":24.0241,"grahas":{"sun":{"sidereal_longitude":347.693279,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":91.847579,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false,"latitude":-3.2806},"mars":{"sidereal_longitude":130.544779,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":true},"mercury":{"sidereal_longitude":330.298179,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":19.09657900000002,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"venus":{"sidereal_longitude":33.435978999999975,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":183.021979,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":true},"rahu":{"sidereal_longitude":228.0404,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":48.0404,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","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":2012,"month":4,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2456018.770833,"kali_year":5113,"ahargana":1867553.2708,"sun":{"sidereal_longitude":347.8311,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":94.8739,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":107.0428,"elapsed_within_tithi_degrees":11.0428},"nakshatra":{"number":8,"name":"Puṣya","pada":1,"moon_longitude":94.8739,"elapsed_within_degrees":1.5405},"yoga":{"number":7,"name":"Sukarma","sum_longitude":82.7049},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.281,"elongation":107.043},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.281,"opposition_distance":72.957}},"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":"05:34","sunsetLocal":"18:16","solarNoonLocal":"11:55","dayLengthHours":12.705702541834206,"dayLengthDisplay":"12 Hours 42 Mins 21 Secs","nightLengthDisplay":"11 Hours 17 Mins 39 Secs","moonriseLocal":"11:28","moonsetLocal":"02:15","rahuKala":{"name":"Rāhu Kāla","start":"16:41","end":"18:16","startHours":16.679030054873685,"endHours":18.26724287260296,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:55","end":"13:30","startHours":11.914391601685857,"endHours":13.502604419415132,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:05","end":"16:41","startHours":15.090817237144408,"endHours":16.679030054873685,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:32","end":"08:57","startHours":8.526204257196735,"endHours":8.949727675257876,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:05","end":"06:26","startHours":6.090944603345179,"endHours":6.429763337794091,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:29","end":"12:20","startHours":11.490868183624716,"endHours":12.337915019746998,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:52","end":"04:43","startHours":3.8674466585241927,"endHours":4.714493494646473,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:30","end":"05:34","startHours":4.502731785615904,"endHours":5.561540330768754,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:02","end":"14:53","startHours":14.032008691991557,"endHours":14.879055528113836,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:04","end":"18:28","startHours":18.06724287260296,"endHours":18.46724287260296,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:16","end":"18:48","startHours":18.26724287260296,"endHours":18.796647145179385,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:01","end":"19:46","startHours":18.01724287260296,"endHours":19.76724287260296,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:29","end":"00:20","startHours":23.490868183624716,"endHours":24.337915019746998,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:34","end":"07:09","startHours":5.561540330768754,"endHours":7.1497531484980295,"quality":"inauspicious"},{"name":"Chala","start":"07:09","end":"08:44","startHours":7.1497531484980295,"endHours":8.737965966227305,"quality":"neutral"},{"name":"Labha","start":"08:44","end":"10:20","startHours":8.737965966227305,"endHours":10.326178783956582,"quality":"auspicious"},{"name":"Amṛta","start":"10:20","end":"11:55","startHours":10.326178783956582,"endHours":11.914391601685857,"quality":"auspicious"},{"name":"Kāla","start":"11:55","end":"13:30","startHours":11.914391601685857,"endHours":13.502604419415132,"quality":"inauspicious"},{"name":"Śubha","start":"13:30","end":"15:05","startHours":13.502604419415132,"endHours":15.090817237144408,"quality":"auspicious"},{"name":"Roga","start":"15:05","end":"16:41","startHours":15.090817237144408,"endHours":16.679030054873685,"quality":"inauspicious"},{"name":"Udveg","start":"16:41","end":"18:16","startHours":16.679030054873685,"endHours":18.26724287260296,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:16","end":"19:41","startHours":18.26724287260296,"endHours":19.679030054873685,"quality":"auspicious"},{"name":"Roga","start":"19:41","end":"21:05","startHours":19.679030054873685,"endHours":21.090817237144407,"quality":"inauspicious"},{"name":"Udveg","start":"21:05","end":"22:30","startHours":21.090817237144407,"endHours":22.502604419415132,"quality":"inauspicious"},{"name":"Chala","start":"22:30","end":"23:55","startHours":22.502604419415132,"endHours":23.914391601685857,"quality":"neutral"},{"name":"Labha","start":"23:55","end":"01:20","startHours":23.914391601685857,"endHours":25.326178783956582,"quality":"auspicious"},{"name":"Amṛta","start":"01:20","end":"02:44","startHours":25.326178783956582,"endHours":26.737965966227307,"quality":"auspicious"},{"name":"Kāla","start":"02:44","end":"04:09","startHours":26.737965966227307,"endHours":28.14975314849803,"quality":"inauspicious"},{"name":"Śubha","start":"04:09","end":"05:34","startHours":28.14975314849803,"endHours":29.561540330768754,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:34","end":"06:34","startHours":5.561540330768754,"endHours":6.561540330768754,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:34","end":"07:34","startHours":6.561540330768754,"endHours":7.561540330768754,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:34","end":"08:34","startHours":7.561540330768754,"endHours":8.561540330768754,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:34","end":"09:34","startHours":8.561540330768754,"endHours":9.561540330768754,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:34","end":"10:34","startHours":9.561540330768754,"endHours":10.561540330768754,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:34","end":"11:34","startHours":10.561540330768754,"endHours":11.561540330768754,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:34","end":"12:34","startHours":11.561540330768754,"endHours":12.561540330768754,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:34","end":"13:34","startHours":12.561540330768754,"endHours":13.561540330768754,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:34","end":"14:34","startHours":13.561540330768754,"endHours":14.561540330768754,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:34","end":"15:34","startHours":14.561540330768754,"endHours":15.561540330768754,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:34","end":"16:34","startHours":15.561540330768754,"endHours":16.561540330768754,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:34","end":"17:34","startHours":16.561540330768754,"endHours":17.561540330768754,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:34","end":"18:34","startHours":17.561540330768754,"endHours":18.561540330768754,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:34","end":"19:34","startHours":18.561540330768754,"endHours":19.561540330768754,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:34","end":"20:34","startHours":19.561540330768754,"endHours":20.561540330768754,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:34","end":"21:34","startHours":20.561540330768754,"endHours":21.561540330768754,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:34","end":"22:34","startHours":21.561540330768754,"endHours":22.561540330768754,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:34","end":"23:34","startHours":22.561540330768754,"endHours":23.561540330768754,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:34","end":"00:34","startHours":23.561540330768754,"endHours":24.561540330768754,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:34","end":"01:34","startHours":24.561540330768754,"endHours":25.561540330768754,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:34","end":"02:34","startHours":25.561540330768754,"endHours":26.561540330768754,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:34","end":"03:34","startHours":26.561540330768754,"endHours":27.561540330768754,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:34","end":"04:34","startHours":27.561540330768754,"endHours":28.561540330768754,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:34","end":"05:34","startHours":28.561540330768754,"endHours":29.561540330768754,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Śrīvatsa","quality":"Auspicious"},"drikRitu":"Vasanta (Spring) (Drik)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":4.633011835521049,"eotMinutes":-4.344296101151456,"ayanamsa":24.0241}},"calendars":{"vikram_samvat":2069,"vikram_samvatsara":"Viśvāvasu","saka_samvat":1934,"saka_samvatsara":"Nandana","bengali_samvat":1419,"malayalam_era":1188,"nanakshahi_year":543,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Navamī · Vikram 2069 Viśvāvasu · Śaka 1934 Nandana"},"festivals":[{"id":"rama-navami","name":"Rāma Navamī","name_sanskrit":"राम नवमी","tradition":"Vaishnava","associated_deity":"Rāma (18th avatāra of Krishna)","deity_avatara_index":18,"significance":"Bhagavān Rāma's birth at Ayodhyā. Sūryavaṃśa's most exalted moment.","vrata":true,"primary_observance":"Madhyāhna (noon) abhiṣekam in Ayodhyā tradition","detection":{"tithi_number":9,"tithi_paksha":"Śukla","lunar_month":"Caitra"},"precedence":1,"related_chart":"rama","historical_anchor":{"event":"Bhagavān Rāma's birth at Ayodhyā","date_julian":"-1626101-04-03","location":"Ayodhyā"},"sources":["Vālmīki Rāmāyaṇa, Bāla-Kāṇḍa 1.18"]},{"id":"mina-sankranti","name":"Mīna Saṅkrānti","name_sanskrit":"मीन सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Pisces; Mīna-māsa begins.","vrata":false,"detection":{"sun_rashi":"Mīna"},"precedence":5}],"todays_walk":{"walk":{"id":"rama-navami-walk","name":"Rāma Navamī Walk","name_sanskrit":"राम नवमी यात्रा","type":"festival","description":"Vālmīki Bāla-Kāṇḍa selections + BG 4.7-8 (avatāra principle).","step_count":9,"url":"/walk/rama-navami-walk"},"reason":"Today is Rāma Navamī — its dedicated walk."},"cosmic_resonances":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","url":"/day/-1626101-04-03","relevance":0.5}]},"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 1, 2012 CE · Chicago, USA · Vidhyamitra","description":"April 1, 2012 CE for Chicago, USA: Śukla Navamī, sūryodaya 05:34, sūryāsta 18:16.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/2012-04-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/2012-04-01","sa":"https://sa.vidhyamitra.com/city/chicago/2012-04-01","hi":"https://hi.vidhyamitra.com/city/chicago/2012-04-01","x-default":"https://vidhyamitra.com/city/chicago/2012-04-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T20:39:14.522Z","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":"2026-05-15T20:39:14.522Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T20:39:14.522Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}