{"id":"vidhyamitra:city-day:chicago:1981-10-08:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/1981-10-08","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-10-08","date_display":"October 8, 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":10,"day":8,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444885.770833,"kali_year":5083,"ahargana":1856420.2708,"sun":{"sidereal_longitude":170.3811,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":282.3538,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":111.9728,"elapsed_within_tithi_degrees":3.9728},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":282.3538,"elapsed_within_degrees":2.3538},"yoga":{"number":7,"name":"Sukarma","sum_longitude":92.7349},"karana":{"half_tithi_index":18,"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":10,"day":8,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444885.770833,"ahargana":1856420.2708,"kali_year":5083,"ayanamsa_lahiri":23.5983,"grahas":{"sun":{"sidereal_longitude":171.08034199999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"moon":{"sidereal_longitude":280.533542,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false,"latitude":-0.3475},"mars":{"sidereal_longitude":118.92204199999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":190.63784199999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":176.17414199999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":215.609642,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":169.15704200000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":97.9203,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":277.9203,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"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":10,"day":8,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444885.770833,"kali_year":5083,"ahargana":1856420.2708,"sun":{"sidereal_longitude":170.3811,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":282.3538,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":111.9728,"elapsed_within_tithi_degrees":3.9728},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":282.3538,"elapsed_within_degrees":2.3538},"yoga":{"number":7,"name":"Sukarma","sum_longitude":92.7349},"karana":{"half_tithi_index":18,"name":"Taitila"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.348,"elongation":111.973},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.348,"opposition_distance":68.027}},"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":"05:54","sunsetLocal":"17:21","solarNoonLocal":"11:37","dayLengthHours":11.45564153011827,"dayLengthDisplay":"11 Hours 27 Mins 20 Secs","nightLengthDisplay":"12 Hours 32 Mins 40 Secs","moonriseLocal":"14:04","moonsetLocal":"23:46","rahuKala":{"name":"Rāhu Kāla","start":"13:03","end":"14:29","startHours":13.053453270805392,"endHours":14.485408462070176,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"05:54","end":"07:20","startHours":5.893677314481474,"endHours":7.325632505746258,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:45","end":"10:11","startHours":8.757587697011042,"endHours":10.189542888275824,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:34","end":"08:57","startHours":8.566660338175737,"endHours":8.948515055846347,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:22","end":"06:41","startHours":6.370995711569735,"endHours":6.676479485706222,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:14","end":"12:00","startHours":11.239643361869998,"endHours":12.003352797211218,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:22","end":"05:08","startHours":4.366258443799039,"endHours":5.129967879140256,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:56","end":"05:54","startHours":4.939040520304951,"endHours":5.893677314481474,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:32","end":"14:18","startHours":13.530771667893653,"endHours":14.29448110323487,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:09","end":"17:33","startHours":17.149318844599744,"endHours":17.549318844599743,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:21","end":"17:50","startHours":17.349318844599743,"endHours":17.826637241688005,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:06","end":"18:51","startHours":17.099318844599743,"endHours":18.849318844599743,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:14","end":"00:00","startHours":23.239643361869998,"endHours":24.003352797211218,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"05:54","end":"07:20","startHours":5.893677314481474,"endHours":7.325632505746258,"quality":"auspicious"},{"name":"Roga","start":"07:20","end":"08:45","startHours":7.325632505746258,"endHours":8.757587697011042,"quality":"inauspicious"},{"name":"Udveg","start":"08:45","end":"10:11","startHours":8.757587697011042,"endHours":10.189542888275824,"quality":"inauspicious"},{"name":"Chala","start":"10:11","end":"11:37","startHours":10.189542888275824,"endHours":11.621498079540608,"quality":"neutral"},{"name":"Labha","start":"11:37","end":"13:03","startHours":11.621498079540608,"endHours":13.053453270805392,"quality":"auspicious"},{"name":"Amṛta","start":"13:03","end":"14:29","startHours":13.053453270805392,"endHours":14.485408462070176,"quality":"auspicious"},{"name":"Kāla","start":"14:29","end":"15:55","startHours":14.485408462070176,"endHours":15.91736365333496,"quality":"inauspicious"},{"name":"Śubha","start":"15:55","end":"17:21","startHours":15.91736365333496,"endHours":17.349318844599743,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:21","end":"18:55","startHours":17.349318844599743,"endHours":18.91736365333496,"quality":"auspicious"},{"name":"Kāla","start":"18:55","end":"20:29","startHours":18.91736365333496,"endHours":20.485408462070176,"quality":"inauspicious"},{"name":"Śubha","start":"20:29","end":"22:03","startHours":20.485408462070176,"endHours":22.05345327080539,"quality":"auspicious"},{"name":"Roga","start":"22:03","end":"23:37","startHours":22.05345327080539,"endHours":23.621498079540608,"quality":"inauspicious"},{"name":"Udveg","start":"23:37","end":"01:11","startHours":23.621498079540608,"endHours":25.189542888275824,"quality":"inauspicious"},{"name":"Chala","start":"01:11","end":"02:45","startHours":25.189542888275824,"endHours":26.75758769701104,"quality":"neutral"},{"name":"Labha","start":"02:45","end":"04:20","startHours":26.75758769701104,"endHours":28.325632505746256,"quality":"auspicious"},{"name":"Amṛta","start":"04:20","end":"05:54","startHours":28.325632505746256,"endHours":29.893677314481472,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:54","end":"06:54","startHours":5.893677314481474,"endHours":6.893677314481474,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"06:54","end":"07:54","startHours":6.893677314481474,"endHours":7.893677314481474,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"07:54","end":"08:54","startHours":7.893677314481474,"endHours":8.893677314481474,"planetary_lord":"Moon"},{"name":"Hora 4","start":"08:54","end":"09:54","startHours":8.893677314481474,"endHours":9.893677314481474,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"09:54","end":"10:54","startHours":9.893677314481474,"endHours":10.893677314481474,"planetary_lord":"Venus"},{"name":"Hora 6","start":"10:54","end":"11:54","startHours":10.893677314481474,"endHours":11.893677314481474,"planetary_lord":"Sun"},{"name":"Hora 7","start":"11:54","end":"12:54","startHours":11.893677314481474,"endHours":12.893677314481474,"planetary_lord":"Mars"},{"name":"Hora 8","start":"12:54","end":"13:54","startHours":12.893677314481474,"endHours":13.893677314481474,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"13:54","end":"14:54","startHours":13.893677314481474,"endHours":14.893677314481474,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"14:54","end":"15:54","startHours":14.893677314481474,"endHours":15.893677314481474,"planetary_lord":"Moon"},{"name":"Hora 11","start":"15:54","end":"16:54","startHours":15.893677314481474,"endHours":16.893677314481472,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"16:54","end":"17:54","startHours":16.893677314481472,"endHours":17.893677314481472,"planetary_lord":"Venus"},{"name":"Hora 13","start":"17:54","end":"18:54","startHours":17.893677314481472,"endHours":18.893677314481472,"planetary_lord":"Sun"},{"name":"Hora 14","start":"18:54","end":"19:54","startHours":18.893677314481472,"endHours":19.893677314481472,"planetary_lord":"Mars"},{"name":"Hora 15","start":"19:54","end":"20:54","startHours":19.893677314481472,"endHours":20.893677314481472,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"20:54","end":"21:54","startHours":20.893677314481472,"endHours":21.893677314481472,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"21:54","end":"22:54","startHours":21.893677314481472,"endHours":22.893677314481472,"planetary_lord":"Moon"},{"name":"Hora 18","start":"22:54","end":"23:54","startHours":22.893677314481472,"endHours":23.893677314481472,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"23:54","end":"00:54","startHours":23.893677314481472,"endHours":24.893677314481472,"planetary_lord":"Venus"},{"name":"Hora 20","start":"00:54","end":"01:54","startHours":24.893677314481472,"endHours":25.893677314481472,"planetary_lord":"Sun"},{"name":"Hora 21","start":"01:54","end":"02:54","startHours":25.893677314481472,"endHours":26.893677314481472,"planetary_lord":"Mars"},{"name":"Hora 22","start":"02:54","end":"03:54","startHours":26.893677314481472,"endHours":27.893677314481472,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"03:54","end":"04:54","startHours":27.893677314481472,"endHours":28.893677314481472,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"04:54","end":"05:54","startHours":28.893677314481472,"endHours":29.893677314481472,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-East","rahuVasa":"North-West","anandadiYoga":{"name":"Mudgara","quality":"Inauspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-5.78433896442967,"eotMinutes":13.229315227563635,"ayanamsa":23.5983}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Daśamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"vijaya-dashami","name":"Vijaya Daśamī (Dasarā / Daśaharā)","name_sanskrit":"विजय दशमी","tradition":"Pan-Hindu","associated_deity":"Rāma (Rāvaṇa-vadha) + Durgā (Mahiṣāsura-vadha)","significance":"Rāma's victory over Rāvaṇa; Durgā's victory; ārambha-divasa for śilpa-kalā.","vrata":true,"primary_observance":"Rāvaṇa-dahana; Aparājitā-pūjā; Śastra-pūjā","detection":{"tithi_number":10,"tithi_paksha":"Śukla","lunar_month":"Āśvina"},"precedence":1,"related_chart":"rama","sources":["Vālmīki Rāmāyaṇa, Yuddha-Kāṇḍa","Devī Mahātmya"]}],"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 October 8, 1981 CE · Chicago, USA · Vidhyamitra","description":"October 8, 1981 CE for Chicago, USA: Śukla Daśamī, sūryodaya 05:54, sūryāsta 17:21.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/1981-10-08","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/1981-10-08","sa":"https://sa.vidhyamitra.com/city/chicago/1981-10-08","hi":"https://hi.vidhyamitra.com/city/chicago/1981-10-08","x-default":"https://vidhyamitra.com/city/chicago/1981-10-08"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T04:13:57.074Z","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":"2026-06-02T04:13:57.074Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T04:13:57.074Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}