{"id":"vidhyamitra:city-day:erode:1981-07-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1981-07-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-07-17","date_display":"July 17, 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":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444802.770833,"kali_year":5083,"ahargana":1856337.2708,"sun":{"sidereal_longitude":90.393,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":268.2653,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":177.8723,"elapsed_within_tithi_degrees":9.8723},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1,"moon_longitude":268.2653,"elapsed_within_degrees":1.5986},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":358.6583},"karana":{"half_tithi_index":29,"name":"Bava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444802.770833,"ahargana":1856337.2708,"kali_year":5083,"ayanamsa_lahiri":23.5951,"grahas":{"sun":{"sidereal_longitude":90.79241300000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false},"moon":{"sidereal_longitude":268.893513,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false,"latitude":1.0916},"mars":{"sidereal_longitude":65.74991299999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":70.512113,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":160.61731299999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"venus":{"sidereal_longitude":117.56501300000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":160.555113,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":102.3181,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":282.3181,"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":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444802.770833,"kali_year":5083,"ahargana":1856337.2708,"sun":{"sidereal_longitude":90.393,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":268.2653,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":177.8723,"elapsed_within_tithi_degrees":9.8723},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1,"moon_longitude":268.2653,"elapsed_within_degrees":1.5986},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":358.6583},"karana":{"half_tithi_index":29,"name":"Bava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.092,"elongation":177.872},"lunar":{"type":"lunar","occurs":true,"moon_latitude":1.092,"opposition_distance":2.128}},"eclipse_window_40days":[{"offset_days":0,"type":"lunar","occurs":true,"moon_latitude":1.092,"opposition_distance":2.128},{"offset_days":14,"type":"solar","occurs":true,"moon_latitude":0.181,"elongation":0.207}]},"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":"06:03","sunsetLocal":"18:46","solarNoonLocal":"12:25","dayLengthHours":12.718056899380073,"dayLengthDisplay":"12 Hours 43 Mins 05 Secs","nightLengthDisplay":"11 Hours 16 Mins 55 Secs","moonriseLocal":"18:33","moonsetLocal":"06:02","rahuKala":{"name":"Rāhu Kāla","start":"10:50","end":"12:25","startHours":10.825322602565805,"endHours":12.415079714988313,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:36","end":"17:11","startHours":15.59459393983333,"endHours":17.184351052255842,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:39","end":"09:14","startHours":7.645808377720786,"endHours":9.235565490143294,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:01","end":"09:27","startHours":9.023597875153627,"endHours":9.447533105132964,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:35","end":"06:56","startHours":6.585970302772447,"endHours":6.925118486755915,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:59","end":"12:50","startHours":11.991144485008977,"endHours":12.839014944967648,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:22","end":"05:12","startHours":4.360310345380934,"endHours":5.208180805339605,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:00","end":"06:03","startHours":4.996213190349938,"endHours":6.056051265298277,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:32","end":"15:23","startHours":14.534755864884993,"endHours":15.382626324843665,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:34","end":"18:58","startHours":18.57410816467835,"endHours":18.97410816467835,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:46","end":"19:18","startHours":18.77410816467835,"endHours":19.30402720215252,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:31","end":"20:16","startHours":18.52410816467835,"endHours":20.27410816467835,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:59","end":"00:50","startHours":23.991144485008977,"endHours":24.839014944967648,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:03","end":"07:39","startHours":6.056051265298277,"endHours":7.645808377720786,"quality":"neutral"},{"name":"Labha","start":"07:39","end":"09:14","startHours":7.645808377720786,"endHours":9.235565490143294,"quality":"auspicious"},{"name":"Amṛta","start":"09:14","end":"10:50","startHours":9.235565490143294,"endHours":10.825322602565805,"quality":"auspicious"},{"name":"Kāla","start":"10:50","end":"12:25","startHours":10.825322602565805,"endHours":12.415079714988313,"quality":"inauspicious"},{"name":"Śubha","start":"12:25","end":"14:00","startHours":12.415079714988313,"endHours":14.004836827410823,"quality":"auspicious"},{"name":"Roga","start":"14:00","end":"15:36","startHours":14.004836827410823,"endHours":15.59459393983333,"quality":"inauspicious"},{"name":"Udveg","start":"15:36","end":"17:11","startHours":15.59459393983333,"endHours":17.184351052255842,"quality":"inauspicious"},{"name":"Chala","start":"17:11","end":"18:46","startHours":17.184351052255842,"endHours":18.77410816467835,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:46","end":"20:11","startHours":18.77410816467835,"endHours":20.184351052255842,"quality":"inauspicious"},{"name":"Udveg","start":"20:11","end":"21:36","startHours":20.184351052255842,"endHours":21.59459393983333,"quality":"inauspicious"},{"name":"Chala","start":"21:36","end":"23:00","startHours":21.59459393983333,"endHours":23.00483682741082,"quality":"neutral"},{"name":"Labha","start":"23:00","end":"00:25","startHours":23.00483682741082,"endHours":24.415079714988313,"quality":"auspicious"},{"name":"Amṛta","start":"00:25","end":"01:50","startHours":24.415079714988313,"endHours":25.825322602565805,"quality":"auspicious"},{"name":"Kāla","start":"01:50","end":"03:14","startHours":25.825322602565805,"endHours":27.235565490143294,"quality":"inauspicious"},{"name":"Śubha","start":"03:14","end":"04:39","startHours":27.235565490143294,"endHours":28.645808377720783,"quality":"auspicious"},{"name":"Roga","start":"04:39","end":"06:03","startHours":28.645808377720783,"endHours":30.056051265298276,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:03","end":"07:03","startHours":6.056051265298277,"endHours":7.056051265298277,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:03","end":"08:03","startHours":7.056051265298277,"endHours":8.056051265298276,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:03","end":"09:03","startHours":8.056051265298276,"endHours":9.056051265298276,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:03","end":"10:03","startHours":9.056051265298276,"endHours":10.056051265298276,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:03","end":"11:03","startHours":10.056051265298276,"endHours":11.056051265298276,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:03","end":"12:03","startHours":11.056051265298276,"endHours":12.056051265298276,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:03","end":"13:03","startHours":12.056051265298276,"endHours":13.056051265298276,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:03","end":"14:03","startHours":13.056051265298276,"endHours":14.056051265298276,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:03","end":"15:03","startHours":14.056051265298276,"endHours":15.056051265298276,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:03","end":"16:03","startHours":15.056051265298276,"endHours":16.056051265298276,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:03","end":"17:03","startHours":16.056051265298276,"endHours":17.056051265298276,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:03","end":"18:03","startHours":17.056051265298276,"endHours":18.056051265298276,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:03","end":"19:03","startHours":18.056051265298276,"endHours":19.056051265298276,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:03","end":"20:03","startHours":19.056051265298276,"endHours":20.056051265298276,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:03","end":"21:03","startHours":20.056051265298276,"endHours":21.056051265298276,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:03","end":"22:03","startHours":21.056051265298276,"endHours":22.056051265298276,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:03","end":"23:03","startHours":22.056051265298276,"endHours":23.056051265298276,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:03","end":"00:03","startHours":23.056051265298276,"endHours":24.056051265298276,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:03","end":"01:03","startHours":24.056051265298276,"endHours":25.056051265298276,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:03","end":"02:03","startHours":25.056051265298276,"endHours":26.056051265298276,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:03","end":"03:03","startHours":26.056051265298276,"endHours":27.056051265298276,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:03","end":"04:03","startHours":27.056051265298276,"endHours":28.056051265298276,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:03","end":"05:03","startHours":28.056051265298276,"endHours":29.056051265298276,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:03","end":"06:03","startHours":29.056051265298276,"endHours":30.056051265298276,"planetary_lord":"Mars"}],"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":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"South-East","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"drikRitu":"Grīṣma (Summer)","vedicRitu":"Grīṣma (Summer)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":21.238087448755877,"eotMinutes":-5.773582899298716,"ayanamsa":23.5951}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Pūrṇimā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"raksha-bandhana","name":"Rakṣā Bandhana / Śrāvaṇa Pūrṇimā","name_sanskrit":"रक्षा बन्धन","tradition":"Pan-Hindu","significance":"Sister-brother bond; Brāhmaṇa Upākarma.","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Śrāvaṇa"},"precedence":1},{"id":"karka-sankranti","name":"Karka Saṅkrānti (Dakṣiṇāyana)","name_sanskrit":"कर्क सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Cancer; Dakṣiṇāyana (south-going) begins. Devatā-rātri begins.","vrata":true,"detection":{"sun_rashi":"Karka"},"precedence":2},{"id":"jhulan-purnima","name":"Jhūlan Pūrṇimā (Rādhā-Krishna swing)","name_sanskrit":"झूलन पूर्णिमा","tradition":"Vaishnava","associated_deity":"Rādhā-Krishna","significance":"Rādhā-Krishna swing-līlā festival; Jhūlan-yātrā culmination.","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Śrāvaṇa"},"precedence":3},{"id":"upakarman-rigveda","name":"Ṛg-Veda Upākarman","name_sanskrit":"ऋग्वेद उपाकर्मन्","tradition":"Smarta","associated_deity":"Ṛṣi-paramparā","significance":"Annual renewal of Veda-svādhyāya for Ṛg-Vedīs. Śrāvaṇa Pūrṇimā.","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Śrāvaṇa"},"precedence":3},{"id":"upakarman-yajurveda","name":"Yajur-Veda Upākarman","name_sanskrit":"यजुर्वेद उपाकर्मन्","tradition":"Smarta","significance":"Annual renewal of Veda-svādhyāya for Yajur-Vedīs.","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Śrāvaṇa"},"precedence":3},{"id":"hayagriva-jayanti","name":"Hayagrīva Jayantī","name_sanskrit":"हयग्रीव जयन्ती","tradition":"Vaishnava","associated_deity":"Hayagrīva (Knowledge-form of Bhagavān)","significance":"Bhagavān as Hayagrīva restored the Vedas to Brahmā. Vidyā-pradāyaka.","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Śrāvaṇa"},"precedence":4,"sources":["Devī-Bhāgavata, Hayagrīva-stotra"]}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-04","event":"Mahābhārata Day 1 (Bhagavad Gītā delivered)","chart_id":"krishna","shared_marker":"same Śukla Pūrṇimā","url":"/day/-3137-10-04","relevance":0.5},{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Śukla Pūrṇimā","url":"/day/-0562-04-11","relevance":0.5}]},"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 July 17, 1981 CE · Erode, Tamil Nadu · Vidhyamitra","description":"July 17, 1981 CE for Erode, Tamil Nadu: Śukla Pūrṇimā, sūryodaya 06:03, sūryāsta 18:46.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1981-07-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1981-07-17","sa":"https://sa.vidhyamitra.com/city/erode/1981-07-17","hi":"https://hi.vidhyamitra.com/city/erode/1981-07-17","x-default":"https://vidhyamitra.com/city/erode/1981-07-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T17:30:41.520Z","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":"2026-05-18T17:30:41.520Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T17:30:41.520Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}