{"id":"vidhyamitra:city-day:chicago:1981-07-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/1981-07-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-07-04","date_display":"July 4, 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":7,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444789.770833,"kali_year":5083,"ahargana":1856324.2708,"sun":{"sidereal_longitude":78.0843,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":108.2988,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":30.2145,"elapsed_within_tithi_degrees":6.2145},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1,"moon_longitude":108.2988,"elapsed_within_degrees":1.6321},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":186.383},"karana":{"half_tithi_index":5,"name":"Gara"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":7,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444789.770833,"ahargana":1856324.2708,"kali_year":5083,"ayanamsa_lahiri":23.5946,"grahas":{"sun":{"sidereal_longitude":78.39630999999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":108.12870999999996,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false,"latitude":0.4146},"mars":{"sidereal_longitude":56.868209999999976,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":62.804610000000025,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":159.08160999999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":101.79480999999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":159.82610999999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":103.0069,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":283.0069,"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":7,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444789.770833,"kali_year":5083,"ahargana":1856324.2708,"sun":{"sidereal_longitude":78.0843,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":108.2988,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":30.2145,"elapsed_within_tithi_degrees":6.2145},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1,"moon_longitude":108.2988,"elapsed_within_degrees":1.6321},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":186.383},"karana":{"half_tithi_index":5,"name":"Gara"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.415,"elongation":30.215},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.415,"opposition_distance":149.785}},"eclipse_window_40days":[{"offset_days":13,"type":"lunar","occurs":true,"moon_latitude":1.092,"opposition_distance":2.128}]},"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":"04:20","sunsetLocal":"19:29","solarNoonLocal":"11:55","dayLengthHours":15.142396445880346,"dayLengthDisplay":"15 Hours 08 Mins 33 Secs","nightLengthDisplay":"8 Hours 51 Mins 27 Secs","moonriseLocal":"06:45","moonsetLocal":"21:02","rahuKala":{"name":"Rāhu Kāla","start":"08:07","end":"10:01","startHours":8.123376109472616,"endHours":10.01617566520766,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:48","end":"15:42","startHours":13.801774776677746,"endHours":15.69457433241279,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"04:20","end":"06:14","startHours":4.33777699800253,"endHours":6.230576553737573,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"07:52","end":"08:23","startHours":7.871002835374611,"endHours":8.375749383570621,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"04:58","end":"05:22","startHours":4.968710183247545,"endHours":5.372507421804354,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:24","end":"12:25","startHours":11.404228672746692,"endHours":12.413721769138716,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"02:19","end":"03:20","startHours":2.3187908052184842,"endHours":3.328283901610507,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:05","end":"04:20","startHours":3.0759106275125014,"endHours":4.33777699800253,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:27","startHours":14.43270796192276,"endHours":15.442201058314783,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:17","end":"19:41","startHours":19.280173443882877,"endHours":19.680173443882875,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:29","end":"20:07","startHours":19.480173443882876,"endHours":20.11110662912789,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:14","end":"20:59","startHours":19.230173443882876,"endHours":20.980173443882876,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:24","end":"00:25","startHours":23.404228672746694,"endHours":24.413721769138714,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"04:20","end":"06:14","startHours":4.33777699800253,"endHours":6.230576553737573,"quality":"inauspicious"},{"name":"Śubha","start":"06:14","end":"08:07","startHours":6.230576553737573,"endHours":8.123376109472616,"quality":"auspicious"},{"name":"Roga","start":"08:07","end":"10:01","startHours":8.123376109472616,"endHours":10.01617566520766,"quality":"inauspicious"},{"name":"Udveg","start":"10:01","end":"11:55","startHours":10.01617566520766,"endHours":11.908975220942704,"quality":"inauspicious"},{"name":"Chala","start":"11:55","end":"13:48","startHours":11.908975220942704,"endHours":13.801774776677746,"quality":"neutral"},{"name":"Labha","start":"13:48","end":"15:42","startHours":13.801774776677746,"endHours":15.69457433241279,"quality":"auspicious"},{"name":"Amṛta","start":"15:42","end":"17:35","startHours":15.69457433241279,"endHours":17.58737388814783,"quality":"auspicious"},{"name":"Kāla","start":"17:35","end":"19:29","startHours":17.58737388814783,"endHours":19.480173443882876,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"19:29","end":"20:35","startHours":19.480173443882876,"endHours":20.587373888147834,"quality":"auspicious"},{"name":"Amṛta","start":"20:35","end":"21:42","startHours":20.587373888147834,"endHours":21.694574332412788,"quality":"auspicious"},{"name":"Kāla","start":"21:42","end":"22:48","startHours":21.694574332412788,"endHours":22.801774776677746,"quality":"inauspicious"},{"name":"Śubha","start":"22:48","end":"23:55","startHours":22.801774776677746,"endHours":23.908975220942704,"quality":"auspicious"},{"name":"Roga","start":"23:55","end":"01:01","startHours":23.908975220942704,"endHours":25.016175665207662,"quality":"inauspicious"},{"name":"Udveg","start":"01:01","end":"02:07","startHours":25.016175665207662,"endHours":26.123376109472616,"quality":"inauspicious"},{"name":"Chala","start":"02:07","end":"03:14","startHours":26.123376109472616,"endHours":27.230576553737574,"quality":"neutral"},{"name":"Labha","start":"03:14","end":"04:20","startHours":27.230576553737574,"endHours":28.337776998002532,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"04:20","end":"05:20","startHours":4.33777699800253,"endHours":5.33777699800253,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"05:20","end":"06:20","startHours":5.33777699800253,"endHours":6.33777699800253,"planetary_lord":"Moon"},{"name":"Hora 3","start":"06:20","end":"07:20","startHours":6.33777699800253,"endHours":7.33777699800253,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"07:20","end":"08:20","startHours":7.33777699800253,"endHours":8.33777699800253,"planetary_lord":"Venus"},{"name":"Hora 5","start":"08:20","end":"09:20","startHours":8.33777699800253,"endHours":9.33777699800253,"planetary_lord":"Sun"},{"name":"Hora 6","start":"09:20","end":"10:20","startHours":9.33777699800253,"endHours":10.33777699800253,"planetary_lord":"Mars"},{"name":"Hora 7","start":"10:20","end":"11:20","startHours":10.33777699800253,"endHours":11.33777699800253,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"11:20","end":"12:20","startHours":11.33777699800253,"endHours":12.33777699800253,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"12:20","end":"13:20","startHours":12.33777699800253,"endHours":13.33777699800253,"planetary_lord":"Moon"},{"name":"Hora 10","start":"13:20","end":"14:20","startHours":13.33777699800253,"endHours":14.33777699800253,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"14:20","end":"15:20","startHours":14.33777699800253,"endHours":15.33777699800253,"planetary_lord":"Venus"},{"name":"Hora 12","start":"15:20","end":"16:20","startHours":15.33777699800253,"endHours":16.337776998002532,"planetary_lord":"Sun"},{"name":"Hora 13","start":"16:20","end":"17:20","startHours":16.337776998002532,"endHours":17.337776998002532,"planetary_lord":"Mars"},{"name":"Hora 14","start":"17:20","end":"18:20","startHours":17.337776998002532,"endHours":18.337776998002532,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"18:20","end":"19:20","startHours":18.337776998002532,"endHours":19.337776998002532,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"19:20","end":"20:20","startHours":19.337776998002532,"endHours":20.337776998002532,"planetary_lord":"Moon"},{"name":"Hora 17","start":"20:20","end":"21:20","startHours":20.337776998002532,"endHours":21.337776998002532,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"21:20","end":"22:20","startHours":21.337776998002532,"endHours":22.337776998002532,"planetary_lord":"Venus"},{"name":"Hora 19","start":"22:20","end":"23:20","startHours":22.337776998002532,"endHours":23.337776998002532,"planetary_lord":"Sun"},{"name":"Hora 20","start":"23:20","end":"00:20","startHours":23.337776998002532,"endHours":24.337776998002532,"planetary_lord":"Mars"},{"name":"Hora 21","start":"00:20","end":"01:20","startHours":24.337776998002532,"endHours":25.337776998002532,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"01:20","end":"02:20","startHours":25.337776998002532,"endHours":26.337776998002532,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"02:20","end":"03:20","startHours":26.337776998002532,"endHours":27.337776998002532,"planetary_lord":"Moon"},{"name":"Hora 24","start":"03:20","end":"04:20","startHours":27.337776998002532,"endHours":28.337776998002532,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"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":"East (Pūrva)","chandraVasa":"South-West","rahuVasa":"East","anandadiYoga":{"name":"Saumya","quality":"Auspicious"},"tropicalRitu":"Grīṣma (Summer) (tropical)","vedicRitu":"Grīṣma (Summer)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":22.8956597087862,"eotMinutes":-4.019313256562166,"ayanamsa":23.5946}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Āṣāḍha","lunar_month_paksha_full":"Āṣāḍha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āṣāḍha","lunar_month_amanta":"Āṣāḍha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mithuna (Āni)","ritu":"Grīṣma (Summer)","display_summary":"Āṣāḍha Śukla Tṛtīyā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 July 4, 1981 CE · Chicago, USA · Vidhyamitra","description":"July 4, 1981 CE for Chicago, USA: Śukla Tṛtīyā, sūryodaya 04:20, sūryāsta 19:29.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/1981-07-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/1981-07-04","sa":"https://sa.vidhyamitra.com/city/chicago/1981-07-04","hi":"https://hi.vidhyamitra.com/city/chicago/1981-07-04","x-default":"https://vidhyamitra.com/city/chicago/1981-07-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T23:20:26.534Z","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":"2026-06-01T23:20:26.534Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T23:20:26.534Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}