{"id":"vidhyamitra:city-day:chicago:1981-08-06:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/1981-08-06","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-08-06","date_display":"August 6, 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":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444822.770833,"kali_year":5083,"ahargana":1856357.2708,"sun":{"sidereal_longitude":109.3846,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":180.7654,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":71.3808,"elapsed_within_tithi_degrees":11.3808},"nakshatra":{"number":14,"name":"Citrā","pada":3,"moon_longitude":180.7654,"elapsed_within_degrees":7.4321},"yoga":{"number":22,"name":"Sādhya","sum_longitude":290.15},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":6,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444822.770833,"ahargana":1856357.2708,"kali_year":5083,"ayanamsa_lahiri":23.5959,"grahas":{"sun":{"sidereal_longitude":109.90654899999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":180.35974899999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false,"latitude":4.4246},"mars":{"sidereal_longitude":79.126349,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":105.517449,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":163.62074899999993,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"venus":{"sidereal_longitude":141.67454899999996,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":162.11284899999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":101.2584,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":281.2584,"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":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444822.770833,"kali_year":5083,"ahargana":1856357.2708,"sun":{"sidereal_longitude":109.3846,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":180.7654,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":71.3808,"elapsed_within_tithi_degrees":11.3808},"nakshatra":{"number":14,"name":"Citrā","pada":3,"moon_longitude":180.7654,"elapsed_within_degrees":7.4321},"yoga":{"number":22,"name":"Sādhya","sum_longitude":290.15},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.425,"elongation":71.381},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.425,"opposition_distance":108.619}},"eclipse_window_40days":[{"offset_days":-20,"type":"lunar","occurs":true,"moon_latitude":1.092,"opposition_distance":2.128},{"offset_days":-6,"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":"04:49","sunsetLocal":"19:04","solarNoonLocal":"11:56","dayLengthHours":14.251954594078294,"dayLengthDisplay":"14 Hours 15 Mins 07 Secs","nightLengthDisplay":"9 Hours 44 Mins 53 Secs","moonriseLocal":"11:08","moonsetLocal":"22:07","rahuKala":{"name":"Rāhu Kāla","start":"13:43","end":"15:30","startHours":13.716686409743545,"endHours":15.498180734003332,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"04:49","end":"06:35","startHours":4.809214788444612,"endHours":6.590709112704398,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:22","end":"10:09","startHours":8.372203436964185,"endHours":10.153697761223972,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:08","end":"08:37","startHours":8.134670860396213,"endHours":8.609736013532157,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:24","end":"05:47","startHours":5.4030462298645405,"endHours":5.783098352373295,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:28","end":"12:25","startHours":11.460126932347816,"endHours":12.410257238619703,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"02:55","end":"03:52","startHours":2.9089541759008393,"endHours":3.8590844821727255,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:37","end":"04:49","startHours":3.621551905604754,"endHours":4.809214788444612,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:19","end":"15:16","startHours":14.310517851163473,"endHours":15.260648157435359,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:52","end":"19:16","startHours":18.861169382522906,"endHours":19.261169382522905,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:04","end":"19:39","startHours":19.061169382522905,"endHours":19.655000823942835,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:49","end":"20:34","startHours":18.811169382522905,"endHours":20.561169382522905,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:28","end":"00:25","startHours":23.460126932347816,"endHours":24.410257238619703,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"04:49","end":"06:35","startHours":4.809214788444612,"endHours":6.590709112704398,"quality":"auspicious"},{"name":"Roga","start":"06:35","end":"08:22","startHours":6.590709112704398,"endHours":8.372203436964185,"quality":"inauspicious"},{"name":"Udveg","start":"08:22","end":"10:09","startHours":8.372203436964185,"endHours":10.153697761223972,"quality":"inauspicious"},{"name":"Chala","start":"10:09","end":"11:56","startHours":10.153697761223972,"endHours":11.93519208548376,"quality":"neutral"},{"name":"Labha","start":"11:56","end":"13:43","startHours":11.93519208548376,"endHours":13.716686409743545,"quality":"auspicious"},{"name":"Amṛta","start":"13:43","end":"15:30","startHours":13.716686409743545,"endHours":15.498180734003332,"quality":"auspicious"},{"name":"Kāla","start":"15:30","end":"17:17","startHours":15.498180734003332,"endHours":17.279675058263116,"quality":"inauspicious"},{"name":"Śubha","start":"17:17","end":"19:04","startHours":17.279675058263116,"endHours":19.061169382522905,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"19:04","end":"20:17","startHours":19.061169382522905,"endHours":20.27967505826312,"quality":"auspicious"},{"name":"Kāla","start":"20:17","end":"21:30","startHours":20.27967505826312,"endHours":21.49818073400333,"quality":"inauspicious"},{"name":"Śubha","start":"21:30","end":"22:43","startHours":21.49818073400333,"endHours":22.716686409743545,"quality":"auspicious"},{"name":"Roga","start":"22:43","end":"23:56","startHours":22.716686409743545,"endHours":23.93519208548376,"quality":"inauspicious"},{"name":"Udveg","start":"23:56","end":"01:09","startHours":23.93519208548376,"endHours":25.153697761223974,"quality":"inauspicious"},{"name":"Chala","start":"01:09","end":"02:22","startHours":25.153697761223974,"endHours":26.372203436964185,"quality":"neutral"},{"name":"Labha","start":"02:22","end":"03:35","startHours":26.372203436964185,"endHours":27.5907091127044,"quality":"auspicious"},{"name":"Amṛta","start":"03:35","end":"04:49","startHours":27.5907091127044,"endHours":28.809214788444613,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"04:49","end":"05:49","startHours":4.809214788444612,"endHours":5.809214788444612,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"05:49","end":"06:49","startHours":5.809214788444612,"endHours":6.809214788444612,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"06:49","end":"07:49","startHours":6.809214788444612,"endHours":7.809214788444612,"planetary_lord":"Moon"},{"name":"Hora 4","start":"07:49","end":"08:49","startHours":7.809214788444612,"endHours":8.809214788444612,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"08:49","end":"09:49","startHours":8.809214788444612,"endHours":9.809214788444612,"planetary_lord":"Venus"},{"name":"Hora 6","start":"09:49","end":"10:49","startHours":9.809214788444612,"endHours":10.809214788444612,"planetary_lord":"Sun"},{"name":"Hora 7","start":"10:49","end":"11:49","startHours":10.809214788444612,"endHours":11.809214788444612,"planetary_lord":"Mars"},{"name":"Hora 8","start":"11:49","end":"12:49","startHours":11.809214788444612,"endHours":12.809214788444612,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"12:49","end":"13:49","startHours":12.809214788444612,"endHours":13.809214788444612,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"13:49","end":"14:49","startHours":13.809214788444612,"endHours":14.809214788444612,"planetary_lord":"Moon"},{"name":"Hora 11","start":"14:49","end":"15:49","startHours":14.809214788444612,"endHours":15.809214788444612,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"15:49","end":"16:49","startHours":15.809214788444612,"endHours":16.809214788444613,"planetary_lord":"Venus"},{"name":"Hora 13","start":"16:49","end":"17:49","startHours":16.809214788444613,"endHours":17.809214788444613,"planetary_lord":"Sun"},{"name":"Hora 14","start":"17:49","end":"18:49","startHours":17.809214788444613,"endHours":18.809214788444613,"planetary_lord":"Mars"},{"name":"Hora 15","start":"18:49","end":"19:49","startHours":18.809214788444613,"endHours":19.809214788444613,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"19:49","end":"20:49","startHours":19.809214788444613,"endHours":20.809214788444613,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"20:49","end":"21:49","startHours":20.809214788444613,"endHours":21.809214788444613,"planetary_lord":"Moon"},{"name":"Hora 18","start":"21:49","end":"22:49","startHours":21.809214788444613,"endHours":22.809214788444613,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"22:49","end":"23:49","startHours":22.809214788444613,"endHours":23.809214788444613,"planetary_lord":"Venus"},{"name":"Hora 20","start":"23:49","end":"00:49","startHours":23.809214788444613,"endHours":24.809214788444613,"planetary_lord":"Sun"},{"name":"Hora 21","start":"00:49","end":"01:49","startHours":24.809214788444613,"endHours":25.809214788444613,"planetary_lord":"Mars"},{"name":"Hora 22","start":"01:49","end":"02:49","startHours":25.809214788444613,"endHours":26.809214788444613,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"02:49","end":"03:49","startHours":26.809214788444613,"endHours":27.809214788444613,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"03:49","end":"04:49","startHours":27.809214788444613,"endHours":28.809214788444613,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"North","rahuVasa":"North-West","anandadiYoga":{"name":"Kāladaṇḍa","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Grīṣma (Summer)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":16.76776946681193,"eotMinutes":-5.592325129025582,"ayanamsa":23.5959}},"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 Ṣaṣṭhī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"kalki-jayanti","name":"Kalki Jayantī","name_sanskrit":"कल्कि जयन्ती","tradition":"Vaishnava","associated_deity":"Kalki (10th daśāvatāra of Krishna)","deity_avatara_index":22,"significance":"Future Kalki avatāra — to manifest at end of Kali Yuga; observed Śrāvaṇa Śukla 6.","vrata":false,"detection":{"tithi_number":6,"tithi_paksha":"Śukla","lunar_month":"Śrāvaṇa"},"precedence":4,"sources":["Bhāgavata 12.2.18-20","Kalki Purāṇa"]}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — 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 6, 1981 CE · Chicago, USA · Vidhyamitra","description":"August 6, 1981 CE for Chicago, USA: Śukla Ṣaṣṭhī, sūryodaya 04:49, sūryāsta 19:04.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/1981-08-06","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/1981-08-06","sa":"https://sa.vidhyamitra.com/city/chicago/1981-08-06","hi":"https://hi.vidhyamitra.com/city/chicago/1981-08-06","x-default":"https://vidhyamitra.com/city/chicago/1981-08-06"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T15:14:37.031Z","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":"2026-06-01T15:14:37.031Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T15:14:37.031Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}