{"id":"vidhyamitra:city-day:chicago:1981-08-03:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/1981-08-03","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-08-03","date_display":"August 3, 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":8,"day":3,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444819.770833,"kali_year":5083,"ahargana":1856354.2708,"sun":{"sidereal_longitude":106.5291,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":143.9363,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":37.4072,"elapsed_within_tithi_degrees":1.4072},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4,"moon_longitude":143.9363,"elapsed_within_degrees":10.6029},"yoga":{"number":19,"name":"Parigha","sum_longitude":250.4654},"karana":{"half_tithi_index":6,"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":8,"day":3,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444819.770833,"ahargana":1856354.2708,"kali_year":5083,"ayanamsa_lahiri":23.5958,"grahas":{"sun":{"sidereal_longitude":107.033864,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":142.867664,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false,"latitude":3.0396},"mars":{"sidereal_longitude":77.14196400000003,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":99.294464,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":163.127164,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"venus":{"sidereal_longitude":138.071464,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":161.84916399999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":101.4173,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":281.4173,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"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":8,"day":3,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444819.770833,"kali_year":5083,"ahargana":1856354.2708,"sun":{"sidereal_longitude":106.5291,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":143.9363,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":37.4072,"elapsed_within_tithi_degrees":1.4072},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4,"moon_longitude":143.9363,"elapsed_within_degrees":10.6029},"yoga":{"number":19,"name":"Parigha","sum_longitude":250.4654},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.04,"elongation":37.407},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.04,"opposition_distance":142.593}},"eclipse_window_40days":[{"offset_days":-17,"type":"lunar","occurs":true,"moon_latitude":1.092,"opposition_distance":2.128},{"offset_days":-3,"type":"solar","occurs":true,"moon_latitude":0.181,"elongation":0.207}]},"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":"04:46","sunsetLocal":"19:07","solarNoonLocal":"11:56","dayLengthHours":14.362549572184832,"dayLengthDisplay":"14 Hours 21 Mins 45 Secs","nightLengthDisplay":"9 Hours 38 Mins 15 Secs","moonriseLocal":"07:57","moonsetLocal":"20:42","rahuKala":{"name":"Rāhu Kāla","start":"06:33","end":"08:21","startHours":6.5540128263699104,"endHours":8.349331522893014,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:09","end":"11:56","startHours":10.144650219416118,"endHours":11.939968915939222,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:44","end":"15:32","startHours":13.735287612462326,"endHours":15.53060630898543,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:07","end":"08:35","startHours":8.109955696689934,"endHours":8.588707349096095,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:21","end":"05:44","startHours":5.3571336953545075,"endHours":5.740135017279436,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:28","end":"12:25","startHours":11.46121726353306,"endHours":12.418720568345384,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"02:51","end":"03:48","startHours":2.8436875202221623,"endHours":3.8011908250344844,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:34","end":"04:46","startHours":3.5618149988314034,"endHours":4.758694129846806,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:20","end":"15:17","startHours":14.33372717797003,"endHours":15.291230482782352,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:55","end":"19:19","startHours":18.92124370203164,"endHours":19.321243702031637,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:07","end":"19:43","startHours":19.121243702031638,"endHours":19.719683267539338,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:52","end":"20:37","startHours":18.871243702031638,"endHours":20.621243702031638,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:28","end":"00:25","startHours":23.46121726353306,"endHours":24.418720568345382,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"04:46","end":"06:33","startHours":4.758694129846806,"endHours":6.5540128263699104,"quality":"auspicious"},{"name":"Kāla","start":"06:33","end":"08:21","startHours":6.5540128263699104,"endHours":8.349331522893014,"quality":"inauspicious"},{"name":"Śubha","start":"08:21","end":"10:09","startHours":8.349331522893014,"endHours":10.144650219416118,"quality":"auspicious"},{"name":"Roga","start":"10:09","end":"11:56","startHours":10.144650219416118,"endHours":11.939968915939222,"quality":"inauspicious"},{"name":"Udveg","start":"11:56","end":"13:44","startHours":11.939968915939222,"endHours":13.735287612462326,"quality":"inauspicious"},{"name":"Chala","start":"13:44","end":"15:32","startHours":13.735287612462326,"endHours":15.53060630898543,"quality":"neutral"},{"name":"Labha","start":"15:32","end":"17:20","startHours":15.53060630898543,"endHours":17.325925005508534,"quality":"auspicious"},{"name":"Amṛta","start":"17:20","end":"19:07","startHours":17.325925005508534,"endHours":19.121243702031638,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:07","end":"20:20","startHours":19.121243702031638,"endHours":20.325925005508534,"quality":"neutral"},{"name":"Labha","start":"20:20","end":"21:32","startHours":20.325925005508534,"endHours":21.53060630898543,"quality":"auspicious"},{"name":"Amṛta","start":"21:32","end":"22:44","startHours":21.53060630898543,"endHours":22.735287612462326,"quality":"auspicious"},{"name":"Kāla","start":"22:44","end":"23:56","startHours":22.735287612462326,"endHours":23.93996891593922,"quality":"inauspicious"},{"name":"Śubha","start":"23:56","end":"01:09","startHours":23.93996891593922,"endHours":25.144650219416118,"quality":"auspicious"},{"name":"Roga","start":"01:09","end":"02:21","startHours":25.144650219416118,"endHours":26.349331522893014,"quality":"inauspicious"},{"name":"Udveg","start":"02:21","end":"03:33","startHours":26.349331522893014,"endHours":27.55401282636991,"quality":"inauspicious"},{"name":"Chala","start":"03:33","end":"04:46","startHours":27.55401282636991,"endHours":28.758694129846806,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"04:46","end":"05:46","startHours":4.758694129846806,"endHours":5.758694129846806,"planetary_lord":"Moon"},{"name":"Hora 2","start":"05:46","end":"06:46","startHours":5.758694129846806,"endHours":6.758694129846806,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"06:46","end":"07:46","startHours":6.758694129846806,"endHours":7.758694129846806,"planetary_lord":"Venus"},{"name":"Hora 4","start":"07:46","end":"08:46","startHours":7.758694129846806,"endHours":8.758694129846806,"planetary_lord":"Sun"},{"name":"Hora 5","start":"08:46","end":"09:46","startHours":8.758694129846806,"endHours":9.758694129846806,"planetary_lord":"Mars"},{"name":"Hora 6","start":"09:46","end":"10:46","startHours":9.758694129846806,"endHours":10.758694129846806,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"10:46","end":"11:46","startHours":10.758694129846806,"endHours":11.758694129846806,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"11:46","end":"12:46","startHours":11.758694129846806,"endHours":12.758694129846806,"planetary_lord":"Moon"},{"name":"Hora 9","start":"12:46","end":"13:46","startHours":12.758694129846806,"endHours":13.758694129846806,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"13:46","end":"14:46","startHours":13.758694129846806,"endHours":14.758694129846806,"planetary_lord":"Venus"},{"name":"Hora 11","start":"14:46","end":"15:46","startHours":14.758694129846806,"endHours":15.758694129846806,"planetary_lord":"Sun"},{"name":"Hora 12","start":"15:46","end":"16:46","startHours":15.758694129846806,"endHours":16.758694129846806,"planetary_lord":"Mars"},{"name":"Hora 13","start":"16:46","end":"17:46","startHours":16.758694129846806,"endHours":17.758694129846806,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"17:46","end":"18:46","startHours":17.758694129846806,"endHours":18.758694129846806,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"18:46","end":"19:46","startHours":18.758694129846806,"endHours":19.758694129846806,"planetary_lord":"Moon"},{"name":"Hora 16","start":"19:46","end":"20:46","startHours":19.758694129846806,"endHours":20.758694129846806,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"20:46","end":"21:46","startHours":20.758694129846806,"endHours":21.758694129846806,"planetary_lord":"Venus"},{"name":"Hora 18","start":"21:46","end":"22:46","startHours":21.758694129846806,"endHours":22.758694129846806,"planetary_lord":"Sun"},{"name":"Hora 19","start":"22:46","end":"23:46","startHours":22.758694129846806,"endHours":23.758694129846806,"planetary_lord":"Mars"},{"name":"Hora 20","start":"23:46","end":"00:46","startHours":23.758694129846806,"endHours":24.758694129846806,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"00:46","end":"01:46","startHours":24.758694129846806,"endHours":25.758694129846806,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"01:46","end":"02:46","startHours":25.758694129846806,"endHours":26.758694129846806,"planetary_lord":"Moon"},{"name":"Hora 23","start":"02:46","end":"03:46","startHours":26.758694129846806,"endHours":27.758694129846806,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"03:46","end":"04:46","startHours":27.758694129846806,"endHours":28.758694129846806,"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"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Grīṣma (Summer)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":17.568920504223854,"eotMinutes":-5.878934956353266,"ayanamsa":23.5958}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Śrāvaṇa","lunar_month_amanta":"Śrāvaṇa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Caturthī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"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 August 3, 1981 CE · Chicago, USA · Vidhyamitra","description":"August 3, 1981 CE for Chicago, USA: Śukla Caturthī, sūryodaya 04:46, sūryāsta 19:07.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/1981-08-03","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/1981-08-03","sa":"https://sa.vidhyamitra.com/city/chicago/1981-08-03","hi":"https://hi.vidhyamitra.com/city/chicago/1981-08-03","x-default":"https://vidhyamitra.com/city/chicago/1981-08-03"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T15:15:51.561Z","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":"2026-06-01T15:15:51.561Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T15:15:51.561Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}