{"id":"vidhyamitra:city-day:chicago:1981-03-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/1981-03-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-03-15","date_display":"March 15, 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":3,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444678.770833,"kali_year":5082,"ahargana":1856213.2708,"sun":{"sidereal_longitude":331.0055,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":83.7917,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":112.7863,"elapsed_within_tithi_degrees":4.7863},"nakshatra":{"number":7,"name":"Punarvasu","pada":2,"moon_longitude":83.7917,"elapsed_within_degrees":3.7917},"yoga":{"number":5,"name":"Śobhana","sum_longitude":54.7972},"karana":{"half_tithi_index":18,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":3,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444678.770833,"ahargana":1856213.2708,"kali_year":5082,"ayanamsa_lahiri":23.5904,"grahas":{"sun":{"sidereal_longitude":330.784851,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":85.36895099999998,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":false,"latitude":-1.907},"mars":{"sidereal_longitude":335.068351,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":303.49105099999997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":163.40365099999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":325.16955099999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":163.570651,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":108.8882,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":288.8882,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":3,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444678.770833,"kali_year":5082,"ahargana":1856213.2708,"sun":{"sidereal_longitude":331.0055,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":83.7917,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":112.7863,"elapsed_within_tithi_degrees":4.7863},"nakshatra":{"number":7,"name":"Punarvasu","pada":2,"moon_longitude":83.7917,"elapsed_within_degrees":3.7917},"yoga":{"number":5,"name":"Śobhana","sum_longitude":54.7972},"karana":{"half_tithi_index":18,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.907,"elongation":112.786},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.907,"opposition_distance":67.214}},"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":"06:04","sunsetLocal":"17:57","solarNoonLocal":"12:00","dayLengthHours":11.882068271358506,"dayLengthDisplay":"11 Hours 52 Mins 55 Secs","nightLengthDisplay":"12 Hours 07 Mins 05 Secs","moonriseLocal":"12:09","moonsetLocal":"03:08","rahuKala":{"name":"Rāhu Kāla","start":"16:28","end":"17:57","startHours":16.458608701980047,"endHours":17.943867235899862,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:00","end":"13:29","startHours":12.00283310022061,"endHours":13.488091634140421,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:58","end":"16:28","startHours":14.973350168060236,"endHours":16.458608701980047,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:50","end":"09:14","startHours":8.834281561191673,"endHours":9.23035050357029,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:33","end":"06:52","startHours":6.556885142514627,"endHours":6.8737402964175205,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:36","end":"12:24","startHours":11.606764157841992,"endHours":12.398902042599227,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:29","end":"05:16","startHours":4.477523195026889,"endHours":5.269661079784122,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:04","end":"06:04","startHours":5.071626608594814,"endHours":6.061798964541356,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:59","end":"14:47","startHours":13.983177812113691,"endHours":14.775315696870924,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:45","end":"18:09","startHours":17.743867235899863,"endHours":18.14386723589986,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:57","end":"18:26","startHours":17.943867235899862,"endHours":18.438953413873133,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:42","end":"19:27","startHours":17.693867235899862,"endHours":19.443867235899862,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:36","end":"00:24","startHours":23.606764157841994,"endHours":24.398902042599225,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:04","end":"07:33","startHours":6.061798964541356,"endHours":7.547057498461169,"quality":"inauspicious"},{"name":"Chala","start":"07:33","end":"09:02","startHours":7.547057498461169,"endHours":9.032316032380983,"quality":"neutral"},{"name":"Labha","start":"09:02","end":"10:31","startHours":9.032316032380983,"endHours":10.517574566300794,"quality":"auspicious"},{"name":"Amṛta","start":"10:31","end":"12:00","startHours":10.517574566300794,"endHours":12.00283310022061,"quality":"auspicious"},{"name":"Kāla","start":"12:00","end":"13:29","startHours":12.00283310022061,"endHours":13.488091634140421,"quality":"inauspicious"},{"name":"Śubha","start":"13:29","end":"14:58","startHours":13.488091634140421,"endHours":14.973350168060236,"quality":"auspicious"},{"name":"Roga","start":"14:58","end":"16:28","startHours":14.973350168060236,"endHours":16.458608701980047,"quality":"inauspicious"},{"name":"Udveg","start":"16:28","end":"17:57","startHours":16.458608701980047,"endHours":17.943867235899862,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:57","end":"19:28","startHours":17.943867235899862,"endHours":19.458608701980047,"quality":"auspicious"},{"name":"Roga","start":"19:28","end":"20:58","startHours":19.458608701980047,"endHours":20.973350168060236,"quality":"inauspicious"},{"name":"Udveg","start":"20:58","end":"22:29","startHours":20.973350168060236,"endHours":22.488091634140424,"quality":"inauspicious"},{"name":"Chala","start":"22:29","end":"00:00","startHours":22.488091634140424,"endHours":24.00283310022061,"quality":"neutral"},{"name":"Labha","start":"00:00","end":"01:31","startHours":24.00283310022061,"endHours":25.517574566300794,"quality":"auspicious"},{"name":"Amṛta","start":"01:31","end":"03:02","startHours":25.517574566300794,"endHours":27.032316032380983,"quality":"auspicious"},{"name":"Kāla","start":"03:02","end":"04:33","startHours":27.032316032380983,"endHours":28.54705749846117,"quality":"inauspicious"},{"name":"Śubha","start":"04:33","end":"06:04","startHours":28.54705749846117,"endHours":30.061798964541357,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:04","end":"07:04","startHours":6.061798964541356,"endHours":7.061798964541356,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:04","end":"08:04","startHours":7.061798964541356,"endHours":8.061798964541357,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:04","end":"09:04","startHours":8.061798964541357,"endHours":9.061798964541357,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:04","end":"10:04","startHours":9.061798964541357,"endHours":10.061798964541357,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:04","end":"11:04","startHours":10.061798964541357,"endHours":11.061798964541357,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:04","end":"12:04","startHours":11.061798964541357,"endHours":12.061798964541357,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:04","end":"13:04","startHours":12.061798964541357,"endHours":13.061798964541357,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:04","end":"14:04","startHours":13.061798964541357,"endHours":14.061798964541357,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:04","end":"15:04","startHours":14.061798964541357,"endHours":15.061798964541357,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:04","end":"16:04","startHours":15.061798964541357,"endHours":16.061798964541357,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:04","end":"17:04","startHours":16.061798964541357,"endHours":17.061798964541357,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:04","end":"18:04","startHours":17.061798964541357,"endHours":18.061798964541357,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:04","end":"19:04","startHours":18.061798964541357,"endHours":19.061798964541357,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:04","end":"20:04","startHours":19.061798964541357,"endHours":20.061798964541357,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:04","end":"21:04","startHours":20.061798964541357,"endHours":21.061798964541357,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:04","end":"22:04","startHours":21.061798964541357,"endHours":22.061798964541357,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:04","end":"23:04","startHours":22.061798964541357,"endHours":23.061798964541357,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:04","end":"00:04","startHours":23.061798964541357,"endHours":24.061798964541357,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:04","end":"01:04","startHours":24.061798964541357,"endHours":25.061798964541357,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:04","end":"02:04","startHours":25.061798964541357,"endHours":26.061798964541357,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:04","end":"03:04","startHours":26.061798964541357,"endHours":27.061798964541357,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:04","end":"04:04","startHours":27.061798964541357,"endHours":28.061798964541357,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:04","end":"05:04","startHours":28.061798964541357,"endHours":29.061798964541357,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:04","end":"06:04","startHours":29.061798964541357,"endHours":30.061798964541357,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Dhvaja","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-2.2341197032092155,"eotMinutes":-9.650786013236482,"ayanamsa":23.5904}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Phālguna","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Śukla Daśamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Punarvasu","url":"/day/-1626101-04-03","relevance":0.5}]},"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 March 15, 1981 CE · Chicago, USA · Vidhyamitra","description":"March 15, 1981 CE for Chicago, USA: Śukla Daśamī, sūryodaya 06:04, sūryāsta 17:57.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/1981-03-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/1981-03-15","sa":"https://sa.vidhyamitra.com/city/chicago/1981-03-15","hi":"https://hi.vidhyamitra.com/city/chicago/1981-03-15","x-default":"https://vidhyamitra.com/city/chicago/1981-03-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T08:38:53.171Z","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":"2026-06-02T08:38:53.171Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T08:38:53.171Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}