{"id":"vidhyamitra:city-day:erode:1931-02-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1931-02-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1931-02-15","date_display":"February 15, 1931 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":1931,"month":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2426387.770833,"kali_year":5032,"ahargana":1837922.2708,"sun":{"sidereal_longitude":302.7672,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":274.3531,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":331.5859,"elapsed_within_tithi_degrees":7.5859},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3,"moon_longitude":274.3531,"elapsed_within_degrees":7.6864},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":217.1203},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"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":1931,"month":2,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2426387.770833,"ahargana":1837922.2708,"kali_year":5032,"ayanamsa_lahiri":22.8908,"grahas":{"sun":{"sidereal_longitude":302.50700099999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":274.91860099999997,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false,"latitude":-4.4726},"mars":{"sidereal_longitude":98.498401,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":true},"mercury":{"sidereal_longitude":283.168401,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":78.894701,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":true},"venus":{"sidereal_longitude":257.042101,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":266.304801,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":358.0334,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":178.0334,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","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":1931,"month":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2426387.770833,"kali_year":5032,"ahargana":1837922.2708,"sun":{"sidereal_longitude":302.7672,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":274.3531,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":331.5859,"elapsed_within_tithi_degrees":7.5859},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3,"moon_longitude":274.3531,"elapsed_within_degrees":7.6864},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":217.1203},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.473,"elongation":28.414},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.473,"opposition_distance":151.586}},"eclipse_window_40days":[]},"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"sunriseLocal":"06:41","sunsetLocal":"18:27","solarNoonLocal":"12:34","dayLengthHours":11.76099492955936,"dayLengthDisplay":"11 Hours 45 Mins 40 Secs","nightLengthDisplay":"12 Hours 14 Mins 20 Secs","moonriseLocal":"04:58","moonsetLocal":"16:29","rahuKala":{"name":"Rāhu Kāla","start":"16:58","end":"18:27","startHours":16.97207744937476,"endHours":18.44220181556968,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:34","end":"14:02","startHours":12.561704350789999,"endHours":14.031828716984919,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:30","end":"16:58","startHours":15.501953083179838,"endHours":16.97207744937476,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:49","startHours":9.425439036240837,"endHours":9.817472200559482,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:10","end":"07:29","startHours":7.171248341408626,"endHours":7.484874872863543,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:10","end":"12:57","startHours":12.169671186471353,"endHours":12.953737515108644,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:07","end":"05:54","startHours":5.113074228735739,"endHours":5.897140557373029,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:42","end":"06:41","startHours":5.701123975213706,"endHours":6.68120688601032,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:31","end":"15:18","startHours":14.521870172383228,"endHours":15.305936501020518,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:15","end":"18:39","startHours":18.24220181556968,"endHours":18.642201815569678,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:27","end":"18:56","startHours":18.44220181556968,"endHours":18.932243270967984,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:12","end":"19:57","startHours":18.19220181556968,"endHours":19.94220181556968,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:10","end":"00:57","startHours":24.169671186471355,"endHours":24.953737515108642,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:41","end":"08:09","startHours":6.68120688601032,"endHours":8.151331252205239,"quality":"inauspicious"},{"name":"Chala","start":"08:09","end":"09:37","startHours":8.151331252205239,"endHours":9.621455618400159,"quality":"neutral"},{"name":"Labha","start":"09:37","end":"11:05","startHours":9.621455618400159,"endHours":11.091579984595079,"quality":"auspicious"},{"name":"Amṛta","start":"11:05","end":"12:34","startHours":11.091579984595079,"endHours":12.561704350789999,"quality":"auspicious"},{"name":"Kāla","start":"12:34","end":"14:02","startHours":12.561704350789999,"endHours":14.031828716984919,"quality":"inauspicious"},{"name":"Śubha","start":"14:02","end":"15:30","startHours":14.031828716984919,"endHours":15.501953083179838,"quality":"auspicious"},{"name":"Roga","start":"15:30","end":"16:58","startHours":15.501953083179838,"endHours":16.97207744937476,"quality":"inauspicious"},{"name":"Udveg","start":"16:58","end":"18:27","startHours":16.97207744937476,"endHours":18.44220181556968,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:27","end":"19:58","startHours":18.44220181556968,"endHours":19.97207744937476,"quality":"auspicious"},{"name":"Roga","start":"19:58","end":"21:30","startHours":19.97207744937476,"endHours":21.50195308317984,"quality":"inauspicious"},{"name":"Udveg","start":"21:30","end":"23:02","startHours":21.50195308317984,"endHours":23.03182871698492,"quality":"inauspicious"},{"name":"Chala","start":"23:02","end":"00:34","startHours":23.03182871698492,"endHours":24.56170435079,"quality":"neutral"},{"name":"Labha","start":"00:34","end":"02:05","startHours":24.56170435079,"endHours":26.09157998459508,"quality":"auspicious"},{"name":"Amṛta","start":"02:05","end":"03:37","startHours":26.09157998459508,"endHours":27.62145561840016,"quality":"auspicious"},{"name":"Kāla","start":"03:37","end":"05:09","startHours":27.62145561840016,"endHours":29.15133125220524,"quality":"inauspicious"},{"name":"Śubha","start":"05:09","end":"06:41","startHours":29.15133125220524,"endHours":30.68120688601032,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:41","end":"07:41","startHours":6.68120688601032,"endHours":7.68120688601032,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:41","end":"08:41","startHours":7.68120688601032,"endHours":8.681206886010319,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:41","end":"09:41","startHours":8.681206886010319,"endHours":9.681206886010319,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:41","end":"10:41","startHours":9.681206886010319,"endHours":10.681206886010319,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:41","end":"11:41","startHours":10.681206886010319,"endHours":11.681206886010319,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:41","end":"12:41","startHours":11.681206886010319,"endHours":12.681206886010319,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:41","end":"13:41","startHours":12.681206886010319,"endHours":13.681206886010319,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:41","end":"14:41","startHours":13.681206886010319,"endHours":14.681206886010319,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:41","end":"15:41","startHours":14.681206886010319,"endHours":15.681206886010319,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:41","end":"16:41","startHours":15.681206886010319,"endHours":16.68120688601032,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:41","end":"17:41","startHours":16.68120688601032,"endHours":17.68120688601032,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:41","end":"18:41","startHours":17.68120688601032,"endHours":18.68120688601032,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:41","end":"19:41","startHours":18.68120688601032,"endHours":19.68120688601032,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:41","end":"20:41","startHours":19.68120688601032,"endHours":20.68120688601032,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:41","end":"21:41","startHours":20.68120688601032,"endHours":21.68120688601032,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:41","end":"22:41","startHours":21.68120688601032,"endHours":22.68120688601032,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:41","end":"23:41","startHours":22.68120688601032,"endHours":23.68120688601032,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:41","end":"00:41","startHours":23.68120688601032,"endHours":24.68120688601032,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:41","end":"01:41","startHours":24.68120688601032,"endHours":25.68120688601032,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:41","end":"02:41","startHours":25.68120688601032,"endHours":26.68120688601032,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:41","end":"03:41","startHours":26.68120688601032,"endHours":27.68120688601032,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:41","end":"04:41","startHours":27.68120688601032,"endHours":28.68120688601032,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:41","end":"05:41","startHours":28.68120688601032,"endHours":29.68120688601032,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:41","end":"06:41","startHours":29.68120688601032,"endHours":30.68120688601032,"planetary_lord":"Jupiter"}],"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":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-13.053598803340515,"eotMinutes":-14.571061047399978,"ayanamsa":22.8908}},"calendars":{"vikram_samvat":1988,"vikram_samvatsara":"Tāraṇa","saka_samvat":1853,"saka_samvatsara":"Prajāpati","bengali_samvat":1338,"malayalam_era":1107,"nanakshahi_year":462,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Trayodaśī · Vikram 1988 Tāraṇa · Śaka 1853 Prajāpati"},"festivals":[{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"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":[]},"validity":{"eternal":false,"location_specific":"erode"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 15, 1931 CE · Erode, Tamil Nadu · Vidhyamitra","description":"February 15, 1931 CE for Erode, Tamil Nadu: Kṛṣṇa Trayodaśī, sūryodaya 06:41, sūryāsta 18:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1931-02-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1931-02-15","sa":"https://sa.vidhyamitra.com/city/erode/1931-02-15","hi":"https://hi.vidhyamitra.com/city/erode/1931-02-15","x-default":"https://vidhyamitra.com/city/erode/1931-02-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T10:40:28.039Z","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":"2026-06-01T10:40:28.039Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T10:40:28.039Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}