{"id":"vidhyamitra:city-day:chicago:2022-01-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/2022-01-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2022-01-31","date_display":"January 31, 2022 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":2022,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2459610.770833,"kali_year":5123,"ahargana":1871145.2708,"sun":{"sidereal_longitude":286.9285,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":272.2757,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":345.3472,"elapsed_within_tithi_degrees":9.3472},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2,"moon_longitude":272.2757,"elapsed_within_degrees":5.609},"yoga":{"number":15,"name":"Vajra","sum_longitude":199.2042},"karana":{"half_tithi_index":57,"name":"Śakuni"},"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":2022,"month":1,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2459610.770833,"ahargana":1871145.2708,"kali_year":5123,"ayanamsa_lahiri":24.1615,"grahas":{"sun":{"sidereal_longitude":286.97093900000004,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":270.436739,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false,"latitude":-3.6648},"mars":{"sidereal_longitude":250.28663899999992,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":270.99493899999993,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":312.821639,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":256.520839,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":291.25753899999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":37.719,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":217.719,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"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":2022,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2459610.770833,"kali_year":5123,"ahargana":1871145.2708,"sun":{"sidereal_longitude":286.9285,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":272.2757,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":345.3472,"elapsed_within_tithi_degrees":9.3472},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2,"moon_longitude":272.2757,"elapsed_within_degrees":5.609},"yoga":{"number":15,"name":"Vajra","sum_longitude":199.2042},"karana":{"half_tithi_index":57,"name":"Śakuni"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.665,"elongation":14.653},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.665,"opposition_distance":165.347}},"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":"07:05","sunsetLocal":"17:04","solarNoonLocal":"12:04","dayLengthHours":9.982399078125523,"dayLengthDisplay":"9 Hours 58 Mins 57 Secs","nightLengthDisplay":"14 Hours 01 Mins 03 Secs","moonriseLocal":"06:16","moonsetLocal":"15:40","rahuKala":{"name":"Rāhu Kāla","start":"08:19","end":"09:34","startHours":8.32408015473363,"endHours":9.571880039499321,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:49","end":"12:04","startHours":10.81967992426501,"endHours":12.0674798090307,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:19","end":"14:34","startHours":13.315279693796391,"endHours":14.563079578562082,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:24","end":"09:44","startHours":9.405506721530562,"endHours":9.738253357468079,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:30","end":"07:46","startHours":7.492213564889837,"endHours":7.758410873639851,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:44","end":"12:24","startHours":11.734733173093183,"endHours":12.400226444968219,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:45","end":"06:25","startHours":5.74529372621787,"endHours":6.410786998092905,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:15","end":"07:05","startHours":6.244413680124147,"endHours":7.07628026996794,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:44","end":"14:24","startHours":13.731212988718289,"endHours":14.396706260593323,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"16:52","end":"17:16","startHours":16.858679348093464,"endHours":17.258679348093462,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:04","end":"17:28","startHours":17.058679348093463,"endHours":17.47461264301536,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:49","end":"18:34","startHours":16.808679348093463,"endHours":18.558679348093463,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:44","end":"00:24","startHours":23.734733173093183,"endHours":24.40022644496822,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"07:05","end":"08:19","startHours":7.07628026996794,"endHours":8.32408015473363,"quality":"auspicious"},{"name":"Kāla","start":"08:19","end":"09:34","startHours":8.32408015473363,"endHours":9.571880039499321,"quality":"inauspicious"},{"name":"Śubha","start":"09:34","end":"10:49","startHours":9.571880039499321,"endHours":10.81967992426501,"quality":"auspicious"},{"name":"Roga","start":"10:49","end":"12:04","startHours":10.81967992426501,"endHours":12.0674798090307,"quality":"inauspicious"},{"name":"Udveg","start":"12:04","end":"13:19","startHours":12.0674798090307,"endHours":13.315279693796391,"quality":"inauspicious"},{"name":"Chala","start":"13:19","end":"14:34","startHours":13.315279693796391,"endHours":14.563079578562082,"quality":"neutral"},{"name":"Labha","start":"14:34","end":"15:49","startHours":14.563079578562082,"endHours":15.810879463327772,"quality":"auspicious"},{"name":"Amṛta","start":"15:49","end":"17:04","startHours":15.810879463327772,"endHours":17.058679348093463,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:04","end":"18:49","startHours":17.058679348093463,"endHours":18.810879463327772,"quality":"neutral"},{"name":"Labha","start":"18:49","end":"20:34","startHours":18.810879463327772,"endHours":20.563079578562082,"quality":"auspicious"},{"name":"Amṛta","start":"20:34","end":"22:19","startHours":20.563079578562082,"endHours":22.31527969379639,"quality":"auspicious"},{"name":"Kāla","start":"22:19","end":"00:04","startHours":22.31527969379639,"endHours":24.0674798090307,"quality":"inauspicious"},{"name":"Śubha","start":"00:04","end":"01:49","startHours":24.0674798090307,"endHours":25.81967992426501,"quality":"auspicious"},{"name":"Roga","start":"01:49","end":"03:34","startHours":25.81967992426501,"endHours":27.57188003949932,"quality":"inauspicious"},{"name":"Udveg","start":"03:34","end":"05:19","startHours":27.57188003949932,"endHours":29.32408015473363,"quality":"inauspicious"},{"name":"Chala","start":"05:19","end":"07:05","startHours":29.32408015473363,"endHours":31.07628026996794,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"07:05","end":"08:05","startHours":7.07628026996794,"endHours":8.07628026996794,"planetary_lord":"Moon"},{"name":"Hora 2","start":"08:05","end":"09:05","startHours":8.07628026996794,"endHours":9.07628026996794,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"09:05","end":"10:05","startHours":9.07628026996794,"endHours":10.07628026996794,"planetary_lord":"Venus"},{"name":"Hora 4","start":"10:05","end":"11:05","startHours":10.07628026996794,"endHours":11.07628026996794,"planetary_lord":"Sun"},{"name":"Hora 5","start":"11:05","end":"12:05","startHours":11.07628026996794,"endHours":12.07628026996794,"planetary_lord":"Mars"},{"name":"Hora 6","start":"12:05","end":"13:05","startHours":12.07628026996794,"endHours":13.07628026996794,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"13:05","end":"14:05","startHours":13.07628026996794,"endHours":14.07628026996794,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"14:05","end":"15:05","startHours":14.07628026996794,"endHours":15.07628026996794,"planetary_lord":"Moon"},{"name":"Hora 9","start":"15:05","end":"16:05","startHours":15.07628026996794,"endHours":16.07628026996794,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"16:05","end":"17:05","startHours":16.07628026996794,"endHours":17.07628026996794,"planetary_lord":"Venus"},{"name":"Hora 11","start":"17:05","end":"18:05","startHours":17.07628026996794,"endHours":18.07628026996794,"planetary_lord":"Sun"},{"name":"Hora 12","start":"18:05","end":"19:05","startHours":18.07628026996794,"endHours":19.07628026996794,"planetary_lord":"Mars"},{"name":"Hora 13","start":"19:05","end":"20:05","startHours":19.07628026996794,"endHours":20.07628026996794,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"20:05","end":"21:05","startHours":20.07628026996794,"endHours":21.07628026996794,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"21:05","end":"22:05","startHours":21.07628026996794,"endHours":22.07628026996794,"planetary_lord":"Moon"},{"name":"Hora 16","start":"22:05","end":"23:05","startHours":22.07628026996794,"endHours":23.07628026996794,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"23:05","end":"00:05","startHours":23.07628026996794,"endHours":24.07628026996794,"planetary_lord":"Venus"},{"name":"Hora 18","start":"00:05","end":"01:05","startHours":24.07628026996794,"endHours":25.07628026996794,"planetary_lord":"Sun"},{"name":"Hora 19","start":"01:05","end":"02:05","startHours":25.07628026996794,"endHours":26.07628026996794,"planetary_lord":"Mars"},{"name":"Hora 20","start":"02:05","end":"03:05","startHours":26.07628026996794,"endHours":27.07628026996794,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"03:05","end":"04:05","startHours":27.07628026996794,"endHours":28.07628026996794,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"04:05","end":"05:05","startHours":28.07628026996794,"endHours":29.07628026996794,"planetary_lord":"Moon"},{"name":"Hora 23","start":"05:05","end":"06:05","startHours":29.07628026996794,"endHours":30.07628026996794,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"06:05","end":"07:05","startHours":30.07628026996794,"endHours":31.07628026996794,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"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":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Rākṣasa","quality":"Inauspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-17.43169077629988,"eotMinutes":-13.52958854184206,"ayanamsa":24.1615}},"calendars":{"vikram_samvat":2079,"vikram_samvatsara":"Rākṣasa","saka_samvat":1944,"saka_samvatsara":"Śubhakṛt","bengali_samvat":1429,"malayalam_era":1198,"nanakshahi_year":553,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Caturdaśī · Vikram 2079 Rākṣasa · Śaka 1944 Śubhakṛt"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2},{"id":"masika-shivaratri","name":"Māsika Śivarātri","name_sanskrit":"मासिक शिवरात्रि","tradition":"Shaiva","associated_deity":"Śiva","significance":"Monthly Śiva observance.","vrata":true,"detection":{"tithi_number":29,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"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 31, 2022 CE · Chicago, USA · Vidhyamitra","description":"January 31, 2022 CE for Chicago, USA: Kṛṣṇa Caturdaśī, sūryodaya 07:05, sūryāsta 17:04.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/2022-01-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/2022-01-31","sa":"https://sa.vidhyamitra.com/city/chicago/2022-01-31","hi":"https://hi.vidhyamitra.com/city/chicago/2022-01-31","x-default":"https://vidhyamitra.com/city/chicago/2022-01-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T22:10:54.787Z","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":"2026-05-14T22:10:54.787Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T22:10:54.787Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}