{"id":"vidhyamitra:city-day:chicago:1973-01-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/1973-01-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1973-01-01","date_display":"January 1, 1973 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":1973,"month":1,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441683.770833,"kali_year":5074,"ahargana":1853218.2708,"sun":{"sidereal_longitude":256.8407,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":215.553,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":27,"name":"Dvādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvādaśī","elongation_degrees":318.7123,"elapsed_within_tithi_degrees":6.7123},"nakshatra":{"number":17,"name":"Anurādhā","pada":1,"moon_longitude":215.553,"elapsed_within_degrees":2.2196},"yoga":{"number":9,"name":"Śūla","sum_longitude":112.3937},"karana":{"half_tithi_index":53,"name":"Taitila"},"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":1973,"month":1,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441683.770833,"ahargana":1853218.2708,"kali_year":5074,"ayanamsa_lahiri":23.4758,"grahas":{"sun":{"sidereal_longitude":257.0069820000001,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":217.62858200000005,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false,"latitude":-3.5459},"mars":{"sidereal_longitude":217.82178199999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":241.53178200000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":264.890982,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":233.453482,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":52.123181999999986,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":267.5777,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":87.5777,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","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":1973,"month":1,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441683.770833,"kali_year":5074,"ahargana":1853218.2708,"sun":{"sidereal_longitude":256.8407,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":215.553,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":27,"name":"Dvādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvādaśī","elongation_degrees":318.7123,"elapsed_within_tithi_degrees":6.7123},"nakshatra":{"number":17,"name":"Anurādhā","pada":1,"moon_longitude":215.553,"elapsed_within_degrees":2.2196},"yoga":{"number":9,"name":"Śūla","sum_longitude":112.3937},"karana":{"half_tithi_index":53,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.546,"elongation":41.288},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.546,"opposition_distance":138.712}},"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":"07:19","sunsetLocal":"16:30","solarNoonLocal":"11:54","dayLengthHours":9.188533916835988,"dayLengthDisplay":"9 Hours 11 Mins 19 Secs","nightLengthDisplay":"14 Hours 48 Mins 41 Secs","moonriseLocal":"04:31","moonsetLocal":"14:02","rahuKala":{"name":"Rāhu Kāla","start":"08:27","end":"09:36","startHours":8.458039419909774,"endHours":9.606606159514271,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:45","end":"11:54","startHours":10.75517289911877,"endHours":11.90373963872327,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:03","end":"14:12","startHours":13.052306378327767,"endHours":14.200873117932266,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:27","end":"09:46","startHours":9.453463927567006,"endHours":9.759748391461539,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:42","end":"07:56","startHours":7.692328260173441,"endHours":7.937355831289067,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:36","end":"12:13","startHours":11.597455174828736,"endHours":12.210024102617803,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"06:05","end":"06:42","startHours":6.084334824727143,"endHours":6.696903752516209,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:33","end":"07:19","startHours":6.543761520568943,"endHours":7.309472680305275,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:26","end":"14:03","startHours":13.435161958195934,"endHours":14.047730885985,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"16:18","end":"16:42","startHours":16.298006597141264,"endHours":16.698006597141262,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"16:30","end":"16:53","startHours":16.498006597141263,"endHours":16.88086217700943,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:15","end":"18:00","startHours":16.248006597141263,"endHours":17.998006597141263,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:36","end":"00:13","startHours":23.597455174828738,"endHours":24.2100241026178,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"07:19","end":"08:27","startHours":7.309472680305275,"endHours":8.458039419909774,"quality":"auspicious"},{"name":"Kāla","start":"08:27","end":"09:36","startHours":8.458039419909774,"endHours":9.606606159514271,"quality":"inauspicious"},{"name":"Śubha","start":"09:36","end":"10:45","startHours":9.606606159514271,"endHours":10.75517289911877,"quality":"auspicious"},{"name":"Roga","start":"10:45","end":"11:54","startHours":10.75517289911877,"endHours":11.90373963872327,"quality":"inauspicious"},{"name":"Udveg","start":"11:54","end":"13:03","startHours":11.90373963872327,"endHours":13.052306378327767,"quality":"inauspicious"},{"name":"Chala","start":"13:03","end":"14:12","startHours":13.052306378327767,"endHours":14.200873117932266,"quality":"neutral"},{"name":"Labha","start":"14:12","end":"15:21","startHours":14.200873117932266,"endHours":15.349439857536764,"quality":"auspicious"},{"name":"Amṛta","start":"15:21","end":"16:30","startHours":15.349439857536764,"endHours":16.498006597141263,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"16:30","end":"18:21","startHours":16.498006597141263,"endHours":18.349439857536765,"quality":"neutral"},{"name":"Labha","start":"18:21","end":"20:12","startHours":18.349439857536765,"endHours":20.200873117932264,"quality":"auspicious"},{"name":"Amṛta","start":"20:12","end":"22:03","startHours":20.200873117932264,"endHours":22.052306378327767,"quality":"auspicious"},{"name":"Kāla","start":"22:03","end":"23:54","startHours":22.052306378327767,"endHours":23.90373963872327,"quality":"inauspicious"},{"name":"Śubha","start":"23:54","end":"01:45","startHours":23.90373963872327,"endHours":25.75517289911877,"quality":"auspicious"},{"name":"Roga","start":"01:45","end":"03:36","startHours":25.75517289911877,"endHours":27.60660615951427,"quality":"inauspicious"},{"name":"Udveg","start":"03:36","end":"05:27","startHours":27.60660615951427,"endHours":29.458039419909774,"quality":"inauspicious"},{"name":"Chala","start":"05:27","end":"07:19","startHours":29.458039419909774,"endHours":31.309472680305277,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"07:19","end":"08:19","startHours":7.309472680305275,"endHours":8.309472680305275,"planetary_lord":"Moon"},{"name":"Hora 2","start":"08:19","end":"09:19","startHours":8.309472680305275,"endHours":9.309472680305275,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"09:19","end":"10:19","startHours":9.309472680305275,"endHours":10.309472680305275,"planetary_lord":"Venus"},{"name":"Hora 4","start":"10:19","end":"11:19","startHours":10.309472680305275,"endHours":11.309472680305275,"planetary_lord":"Sun"},{"name":"Hora 5","start":"11:19","end":"12:19","startHours":11.309472680305275,"endHours":12.309472680305275,"planetary_lord":"Mars"},{"name":"Hora 6","start":"12:19","end":"13:19","startHours":12.309472680305275,"endHours":13.309472680305275,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"13:19","end":"14:19","startHours":13.309472680305275,"endHours":14.309472680305275,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"14:19","end":"15:19","startHours":14.309472680305275,"endHours":15.309472680305275,"planetary_lord":"Moon"},{"name":"Hora 9","start":"15:19","end":"16:19","startHours":15.309472680305275,"endHours":16.309472680305277,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"16:19","end":"17:19","startHours":16.309472680305277,"endHours":17.309472680305277,"planetary_lord":"Venus"},{"name":"Hora 11","start":"17:19","end":"18:19","startHours":17.309472680305277,"endHours":18.309472680305277,"planetary_lord":"Sun"},{"name":"Hora 12","start":"18:19","end":"19:19","startHours":18.309472680305277,"endHours":19.309472680305277,"planetary_lord":"Mars"},{"name":"Hora 13","start":"19:19","end":"20:19","startHours":19.309472680305277,"endHours":20.309472680305277,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"20:19","end":"21:19","startHours":20.309472680305277,"endHours":21.309472680305277,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"21:19","end":"22:19","startHours":21.309472680305277,"endHours":22.309472680305277,"planetary_lord":"Moon"},{"name":"Hora 16","start":"22:19","end":"23:19","startHours":22.309472680305277,"endHours":23.309472680305277,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"23:19","end":"00:19","startHours":23.309472680305277,"endHours":24.309472680305277,"planetary_lord":"Venus"},{"name":"Hora 18","start":"00:19","end":"01:19","startHours":24.309472680305277,"endHours":25.309472680305277,"planetary_lord":"Sun"},{"name":"Hora 19","start":"01:19","end":"02:19","startHours":25.309472680305277,"endHours":26.309472680305277,"planetary_lord":"Mars"},{"name":"Hora 20","start":"02:19","end":"03:19","startHours":26.309472680305277,"endHours":27.309472680305277,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"03:19","end":"04:19","startHours":27.309472680305277,"endHours":28.309472680305277,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"04:19","end":"05:19","startHours":28.309472680305277,"endHours":29.309472680305277,"planetary_lord":"Moon"},{"name":"Hora 23","start":"05:19","end":"06:19","startHours":29.309472680305277,"endHours":30.309472680305277,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"06:19","end":"07:19","startHours":30.309472680305277,"endHours":31.309472680305277,"planetary_lord":"Venus"}],"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","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-East","rahuVasa":"North-East","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.02259825192925,"eotMinutes":-3.705178323396069,"ayanamsa":23.4758}},"calendars":{"vikram_samvat":2030,"vikram_samvatsara":"Akṣaya","saka_samvat":1895,"saka_samvatsara":"Pramādī","bengali_samvat":1380,"malayalam_era":1149,"nanakshahi_year":504,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Kṛṣṇa Dvādaśī · Vikram 2030 Akṣaya · Śaka 1895 Pramādī"},"festivals":[],"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 January 1, 1973 CE · Chicago, USA · Vidhyamitra","description":"January 1, 1973 CE for Chicago, USA: Kṛṣṇa Dvādaśī, sūryodaya 07:19, sūryāsta 16:30.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/1973-01-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/1973-01-01","sa":"https://sa.vidhyamitra.com/city/chicago/1973-01-01","hi":"https://hi.vidhyamitra.com/city/chicago/1973-01-01","x-default":"https://vidhyamitra.com/city/chicago/1973-01-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T15:59:24.862Z","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":"2026-06-02T15:59:24.862Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T15:59:24.862Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}