{"id":"vidhyamitra:city-day:surat:2017-07-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/surat/2017-07-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2017-07-31","date_display":"July 31, 2017 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":2017,"month":7,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457965.770833,"kali_year":5119,"ahargana":1869500.2708,"sun":{"sidereal_longitude":103.3768,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":196.4991,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":93.1224,"elapsed_within_tithi_degrees":9.1224},"nakshatra":{"number":15,"name":"Svātī","pada":3,"moon_longitude":196.4991,"elapsed_within_degrees":9.8325},"yoga":{"number":23,"name":"Śubha","sum_longitude":299.8759},"karana":{"half_tithi_index":15,"name":"Bava"},"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":2017,"month":7,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2457965.770833,"ahargana":1869500.2708,"kali_year":5119,"ayanamsa_lahiri":24.0986,"grahas":{"sun":{"sidereal_longitude":103.94939,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"moon":{"sidereal_longitude":198.40049,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":false,"latitude":4.27},"mars":{"sidereal_longitude":102.44648999999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":130.91598999999997,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":172.42598999999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"venus":{"sidereal_longitude":64.97998999999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":237.43749000000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":124.879,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":304.879,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"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":2017,"month":7,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457965.770833,"kali_year":5119,"ahargana":1869500.2708,"sun":{"sidereal_longitude":103.3768,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":196.4991,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":93.1224,"elapsed_within_tithi_degrees":9.1224},"nakshatra":{"number":15,"name":"Svātī","pada":3,"moon_longitude":196.4991,"elapsed_within_degrees":9.8325},"yoga":{"number":23,"name":"Śubha","sum_longitude":299.8759},"karana":{"half_tithi_index":15,"name":"Bava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.27,"elongation":93.122},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.27,"opposition_distance":86.878}},"eclipse_window_40days":[]},"city":{"slug":"surat","name":"Surat, Gujarat","lat":21.1702,"lon":72.8311,"tz_offset_hours":5.5,"state":"Gujarat","country":"IN","tier":"mega","elevation_m":13},"tier2":{"city":{"slug":"surat","name":"Surat, Gujarat","lat":21.1702,"lon":72.8311,"tz_offset_hours":5.5,"state":"Gujarat","country":"IN","tier":"mega","elevation_m":13},"sunriseLocal":"06:12","sunsetLocal":"19:18","solarNoonLocal":"12:45","dayLengthHours":13.10501835754639,"dayLengthDisplay":"13 Hours 06 Mins 18 Secs","nightLengthDisplay":"10 Hours 53 Mins 42 Secs","moonriseLocal":"13:25","moonsetLocal":"00:40","rahuKala":{"name":"Rāhu Kāla","start":"07:50","end":"09:28","startHours":7.831401024459285,"endHours":9.469528319152584,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:06","end":"12:45","startHours":11.107655613845882,"endHours":12.74578290853918,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:23","end":"16:01","startHours":14.38391020323248,"endHours":16.02203749792578,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:15","end":"09:41","startHours":9.25111134652681,"endHours":9.687945291778357,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:44","end":"07:05","startHours":6.739316161330419,"endHours":7.088783317531656,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:19","end":"13:11","startHours":12.308948963287634,"endHours":13.182616853790726,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:27","end":"05:19","startHours":4.4459379487598,"endHours":5.319605839262893,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:06","end":"06:12","startHours":5.10118886663712,"endHours":6.193273729765986,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:56","end":"15:48","startHours":14.929952634796912,"endHours":15.803620525300005,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:06","end":"19:30","startHours":19.098292087312377,"endHours":19.498292087312375,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:18","end":"19:51","startHours":19.298292087312376,"endHours":19.84433451887681,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:03","end":"20:48","startHours":19.048292087312376,"endHours":20.798292087312376,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:19","end":"01:11","startHours":24.308948963287634,"endHours":25.182616853790726,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:12","end":"07:50","startHours":6.193273729765986,"endHours":7.831401024459285,"quality":"auspicious"},{"name":"Kāla","start":"07:50","end":"09:28","startHours":7.831401024459285,"endHours":9.469528319152584,"quality":"inauspicious"},{"name":"Śubha","start":"09:28","end":"11:06","startHours":9.469528319152584,"endHours":11.107655613845882,"quality":"auspicious"},{"name":"Roga","start":"11:06","end":"12:45","startHours":11.107655613845882,"endHours":12.74578290853918,"quality":"inauspicious"},{"name":"Udveg","start":"12:45","end":"14:23","startHours":12.74578290853918,"endHours":14.38391020323248,"quality":"inauspicious"},{"name":"Chala","start":"14:23","end":"16:01","startHours":14.38391020323248,"endHours":16.02203749792578,"quality":"neutral"},{"name":"Labha","start":"16:01","end":"17:40","startHours":16.02203749792578,"endHours":17.660164792619078,"quality":"auspicious"},{"name":"Amṛta","start":"17:40","end":"19:18","startHours":17.660164792619078,"endHours":19.298292087312376,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:18","end":"20:40","startHours":19.298292087312376,"endHours":20.660164792619078,"quality":"neutral"},{"name":"Labha","start":"20:40","end":"22:01","startHours":20.660164792619078,"endHours":22.02203749792578,"quality":"auspicious"},{"name":"Amṛta","start":"22:01","end":"23:23","startHours":22.02203749792578,"endHours":23.38391020323248,"quality":"auspicious"},{"name":"Kāla","start":"23:23","end":"00:45","startHours":23.38391020323248,"endHours":24.74578290853918,"quality":"inauspicious"},{"name":"Śubha","start":"00:45","end":"02:06","startHours":24.74578290853918,"endHours":26.107655613845882,"quality":"auspicious"},{"name":"Roga","start":"02:06","end":"03:28","startHours":26.107655613845882,"endHours":27.469528319152584,"quality":"inauspicious"},{"name":"Udveg","start":"03:28","end":"04:50","startHours":27.469528319152584,"endHours":28.831401024459282,"quality":"inauspicious"},{"name":"Chala","start":"04:50","end":"06:12","startHours":28.831401024459282,"endHours":30.193273729765984,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:12","end":"07:12","startHours":6.193273729765986,"endHours":7.193273729765986,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:12","end":"08:12","startHours":7.193273729765986,"endHours":8.193273729765986,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:12","end":"09:12","startHours":8.193273729765986,"endHours":9.193273729765986,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:12","end":"10:12","startHours":9.193273729765986,"endHours":10.193273729765986,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:12","end":"11:12","startHours":10.193273729765986,"endHours":11.193273729765986,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:12","end":"12:12","startHours":11.193273729765986,"endHours":12.193273729765986,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:12","end":"13:12","startHours":12.193273729765986,"endHours":13.193273729765986,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:12","end":"14:12","startHours":13.193273729765986,"endHours":14.193273729765986,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:12","end":"15:12","startHours":14.193273729765986,"endHours":15.193273729765986,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:12","end":"16:12","startHours":15.193273729765986,"endHours":16.193273729765984,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:12","end":"17:12","startHours":16.193273729765984,"endHours":17.193273729765984,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:12","end":"18:12","startHours":17.193273729765984,"endHours":18.193273729765984,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:12","end":"19:12","startHours":18.193273729765984,"endHours":19.193273729765984,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:12","end":"20:12","startHours":19.193273729765984,"endHours":20.193273729765984,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:12","end":"21:12","startHours":20.193273729765984,"endHours":21.193273729765984,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:12","end":"22:12","startHours":21.193273729765984,"endHours":22.193273729765984,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:12","end":"23:12","startHours":22.193273729765984,"endHours":23.193273729765984,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:12","end":"00:12","startHours":23.193273729765984,"endHours":24.193273729765984,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:12","end":"01:12","startHours":24.193273729765984,"endHours":25.193273729765984,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:12","end":"02:12","startHours":25.193273729765984,"endHours":26.193273729765984,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:12","end":"03:12","startHours":26.193273729765984,"endHours":27.193273729765984,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:12","end":"04:12","startHours":27.193273729765984,"endHours":28.193273729765984,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:12","end":"05:12","startHours":28.193273729765984,"endHours":29.193273729765984,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:12","end":"06:12","startHours":29.193273729765984,"endHours":30.193273729765984,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"North","rahuVasa":"North-East","anandadiYoga":{"name":"Siddhi","quality":"Auspicious"},"drikRitu":"Varṣā (Monsoon) (Drik)","vedicRitu":"Grīṣma (Summer)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":18.25292256433708,"eotMinutes":-6.071374512350812,"ayanamsa":24.0986}},"calendars":{"vikram_samvat":2074,"vikram_samvatsara":"Sādhāraṇa","saka_samvat":1939,"saka_samvatsara":"Hemalambī","bengali_samvat":1424,"malayalam_era":1193,"nanakshahi_year":548,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Aṣṭamī · Vikram 2074 Sādhāraṇa · Śaka 1939 Hemalambī"},"festivals":[{"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}],"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":[{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Śukla Aṣṭamī","url":"/day/-3137-12-25","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"surat"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga July 31, 2017 CE · Surat, Gujarat · Vidhyamitra","description":"July 31, 2017 CE for Surat, Gujarat: Śukla Aṣṭamī, sūryodaya 06:12, sūryāsta 19:18.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/surat/2017-07-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/surat/2017-07-31","sa":"https://sa.vidhyamitra.com/city/surat/2017-07-31","hi":"https://hi.vidhyamitra.com/city/surat/2017-07-31","x-default":"https://vidhyamitra.com/city/surat/2017-07-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T14:38:37.315Z","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":"2026-05-15T14:38:37.315Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T14:38:37.315Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}