{"id":"vidhyamitra:city-day:jamnagar:1981-02-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/jamnagar/1981-02-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-17","date_display":"February 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":2,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444652.770833,"kali_year":5082,"ahargana":1856187.2708,"sun":{"sidereal_longitude":304.8589,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":102.9286,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":158.0697,"elapsed_within_tithi_degrees":2.0697},"nakshatra":{"number":8,"name":"Puṣya","pada":3,"moon_longitude":102.9286,"elapsed_within_degrees":9.5952},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":47.7874},"karana":{"half_tithi_index":26,"name":"Gara"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":2,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444652.770833,"ahargana":1856187.2708,"kali_year":5082,"ayanamsa_lahiri":23.5894,"grahas":{"sun":{"sidereal_longitude":304.70534399999997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":101.85204399999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false,"latitude":-0.5741},"mars":{"sidereal_longitude":314.676244,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":305.935744,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":166.01434399999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":292.70184399999994,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":165.22884399999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.2658,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.2658,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":2,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444652.770833,"kali_year":5082,"ahargana":1856187.2708,"sun":{"sidereal_longitude":304.8589,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":102.9286,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":158.0697,"elapsed_within_tithi_degrees":2.0697},"nakshatra":{"number":8,"name":"Puṣya","pada":3,"moon_longitude":102.9286,"elapsed_within_degrees":9.5952},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":47.7874},"karana":{"half_tithi_index":26,"name":"Gara"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.574,"elongation":158.07},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.574,"opposition_distance":21.93}},"eclipse_window_40days":[{"offset_days":-12,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"city":{"slug":"jamnagar","name":"Jamnagar, Gujarat","lat":22.4707,"lon":70.0577,"tz_offset_hours":5.5,"state":"Gujarat","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"jamnagar","name":"Jamnagar, Gujarat","lat":22.4707,"lon":70.0577,"tz_offset_hours":5.5,"state":"Gujarat","country":"IN","tier":"tier-1"},"sunriseLocal":"07:21","sunsetLocal":"18:48","solarNoonLocal":"13:04","dayLengthHours":11.447016711407962,"dayLengthDisplay":"11 Hours 26 Mins 49 Secs","nightLengthDisplay":"12 Hours 33 Mins 11 Secs","moonriseLocal":"16:58","moonsetLocal":"06:08","rahuKala":{"name":"Rāhu Kāla","start":"15:56","end":"17:22","startHours":15.932783650374262,"endHours":17.363660739300254,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:13","end":"11:38","startHours":10.209275294670281,"endHours":11.640152383596275,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:04","end":"14:30","startHours":13.07102947252227,"endHours":14.501906561448266,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"10:01","end":"10:24","startHours":10.01849168281348,"endHours":10.400058906527079,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:49","end":"08:08","startHours":7.824480146460288,"endHours":8.129733925431166,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:41","end":"13:27","startHours":12.68946224880867,"endHours":13.452596696235869,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:49","end":"06:35","startHours":5.821252221963895,"endHours":6.584386669391092,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:24","end":"07:21","startHours":6.393603057534293,"endHours":7.34752111681829,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:59","end":"15:45","startHours":14.978865591090264,"endHours":15.74200003851746,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:36","end":"19:00","startHours":18.59453782822625,"endHours":18.99453782822625,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:48","end":"19:16","startHours":18.79453782822625,"endHours":19.27149685786825,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:33","end":"20:18","startHours":18.54453782822625,"endHours":20.29453782822625,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:41","end":"01:27","startHours":24.68946224880867,"endHours":25.45259669623587,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"07:21","end":"08:47","startHours":7.34752111681829,"endHours":8.778398205744285,"quality":"inauspicious"},{"name":"Udveg","start":"08:47","end":"10:13","startHours":8.778398205744285,"endHours":10.209275294670281,"quality":"inauspicious"},{"name":"Chala","start":"10:13","end":"11:38","startHours":10.209275294670281,"endHours":11.640152383596275,"quality":"neutral"},{"name":"Labha","start":"11:38","end":"13:04","startHours":11.640152383596275,"endHours":13.07102947252227,"quality":"auspicious"},{"name":"Amṛta","start":"13:04","end":"14:30","startHours":13.07102947252227,"endHours":14.501906561448266,"quality":"auspicious"},{"name":"Kāla","start":"14:30","end":"15:56","startHours":14.501906561448266,"endHours":15.932783650374262,"quality":"inauspicious"},{"name":"Śubha","start":"15:56","end":"17:22","startHours":15.932783650374262,"endHours":17.363660739300254,"quality":"auspicious"},{"name":"Roga","start":"17:22","end":"18:48","startHours":17.363660739300254,"endHours":18.79453782822625,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:48","end":"20:22","startHours":18.79453782822625,"endHours":20.363660739300254,"quality":"inauspicious"},{"name":"Śubha","start":"20:22","end":"21:56","startHours":20.363660739300254,"endHours":21.93278365037426,"quality":"auspicious"},{"name":"Roga","start":"21:56","end":"23:30","startHours":21.93278365037426,"endHours":23.501906561448266,"quality":"inauspicious"},{"name":"Udveg","start":"23:30","end":"01:04","startHours":23.501906561448266,"endHours":25.07102947252227,"quality":"inauspicious"},{"name":"Chala","start":"01:04","end":"02:38","startHours":25.07102947252227,"endHours":26.640152383596273,"quality":"neutral"},{"name":"Labha","start":"02:38","end":"04:13","startHours":26.640152383596273,"endHours":28.209275294670277,"quality":"auspicious"},{"name":"Amṛta","start":"04:13","end":"05:47","startHours":28.209275294670277,"endHours":29.778398205744285,"quality":"auspicious"},{"name":"Kāla","start":"05:47","end":"07:21","startHours":29.778398205744285,"endHours":31.34752111681829,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:21","end":"08:21","startHours":7.34752111681829,"endHours":8.347521116818289,"planetary_lord":"Mars"},{"name":"Hora 2","start":"08:21","end":"09:21","startHours":8.347521116818289,"endHours":9.347521116818289,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"09:21","end":"10:21","startHours":9.347521116818289,"endHours":10.347521116818289,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"10:21","end":"11:21","startHours":10.347521116818289,"endHours":11.347521116818289,"planetary_lord":"Moon"},{"name":"Hora 5","start":"11:21","end":"12:21","startHours":11.347521116818289,"endHours":12.347521116818289,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"12:21","end":"13:21","startHours":12.347521116818289,"endHours":13.347521116818289,"planetary_lord":"Venus"},{"name":"Hora 7","start":"13:21","end":"14:21","startHours":13.347521116818289,"endHours":14.347521116818289,"planetary_lord":"Sun"},{"name":"Hora 8","start":"14:21","end":"15:21","startHours":14.347521116818289,"endHours":15.347521116818289,"planetary_lord":"Mars"},{"name":"Hora 9","start":"15:21","end":"16:21","startHours":15.347521116818289,"endHours":16.34752111681829,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"16:21","end":"17:21","startHours":16.34752111681829,"endHours":17.34752111681829,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"17:21","end":"18:21","startHours":17.34752111681829,"endHours":18.34752111681829,"planetary_lord":"Moon"},{"name":"Hora 12","start":"18:21","end":"19:21","startHours":18.34752111681829,"endHours":19.34752111681829,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"19:21","end":"20:21","startHours":19.34752111681829,"endHours":20.34752111681829,"planetary_lord":"Venus"},{"name":"Hora 14","start":"20:21","end":"21:21","startHours":20.34752111681829,"endHours":21.34752111681829,"planetary_lord":"Sun"},{"name":"Hora 15","start":"21:21","end":"22:21","startHours":21.34752111681829,"endHours":22.34752111681829,"planetary_lord":"Mars"},{"name":"Hora 16","start":"22:21","end":"23:21","startHours":22.34752111681829,"endHours":23.34752111681829,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"23:21","end":"00:21","startHours":23.34752111681829,"endHours":24.34752111681829,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"00:21","end":"01:21","startHours":24.34752111681829,"endHours":25.34752111681829,"planetary_lord":"Moon"},{"name":"Hora 19","start":"01:21","end":"02:21","startHours":25.34752111681829,"endHours":26.34752111681829,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"02:21","end":"03:21","startHours":26.34752111681829,"endHours":27.34752111681829,"planetary_lord":"Venus"},{"name":"Hora 21","start":"03:21","end":"04:21","startHours":27.34752111681829,"endHours":28.34752111681829,"planetary_lord":"Sun"},{"name":"Hora 22","start":"04:21","end":"05:21","startHours":28.34752111681829,"endHours":29.34752111681829,"planetary_lord":"Mars"},{"name":"Hora 23","start":"05:21","end":"06:21","startHours":29.34752111681829,"endHours":30.34752111681829,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"06:21","end":"07:21","startHours":30.34752111681829,"endHours":31.34752111681829,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Utpāta","quality":"Inauspicious"},"drikRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-12.065406887121862,"eotMinutes":-14.492568351336082,"ayanamsa":23.5894}},"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","solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Śukla Caturdaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"holika-dahana","name":"Holikā Dahana","name_sanskrit":"होलिका दहन","tradition":"Vaishnava","associated_deity":"Bhagavān Narasiṁha (Prahlāda-rakṣaka)","significance":"Burning of Holikā; Prahlāda saved by Hari. Eve of Holi.","vrata":true,"detection":{"tithi_number":14,"tithi_paksha":"Śukla","lunar_month":"Phālguna"},"precedence":2,"sources":["Bhāgavata 7.5"]},{"id":"kumbha-sankranti","name":"Kumbha Saṅkrānti","name_sanskrit":"कुम्भ सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aquarius; Kumbha-māsa begins.","vrata":false,"detection":{"sun_rashi":"Kumbha"},"precedence":5}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"jamnagar"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 17, 1981 CE · Jamnagar, Gujarat · Vidhyamitra","description":"February 17, 1981 CE for Jamnagar, Gujarat: Śukla Caturdaśī, sūryodaya 07:21, sūryāsta 18:48.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/jamnagar/1981-02-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/jamnagar/1981-02-17","sa":"https://sa.vidhyamitra.com/city/jamnagar/1981-02-17","hi":"https://hi.vidhyamitra.com/city/jamnagar/1981-02-17","x-default":"https://vidhyamitra.com/city/jamnagar/1981-02-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T11:33:59.359Z","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":"2026-05-19T11:33:59.359Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T11:33:59.360Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}