{"id":"vidhyamitra:city-day:jamnagar:1981-05-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/jamnagar/1981-05-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-05-18","date_display":"May 18, 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":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444742.770833,"kali_year":5083,"ahargana":1856277.2708,"sun":{"sidereal_longitude":33.439,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":203.0301,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":169.5911,"elapsed_within_tithi_degrees":1.5911},"nakshatra":{"number":16,"name":"Viśākhā","pada":1,"moon_longitude":203.0301,"elapsed_within_degrees":3.0301},"yoga":{"number":18,"name":"Varīyān","sum_longitude":236.4692},"karana":{"half_tithi_index":28,"name":"Viṣṭi"},"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":1981,"month":5,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444742.770833,"ahargana":1856277.2708,"kali_year":5083,"ayanamsa_lahiri":23.5928,"grahas":{"sun":{"sidereal_longitude":33.431906000000026,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":202.992206,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":1},"retrograde":false,"latitude":4.4611},"mars":{"sidereal_longitude":23.501105999999993,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":53.91680600000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":157.16290600000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":44.329206,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":159.44000600000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":105.4972,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":285.4972,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444742.770833,"kali_year":5083,"ahargana":1856277.2708,"sun":{"sidereal_longitude":33.439,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":203.0301,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":169.5911,"elapsed_within_tithi_degrees":1.5911},"nakshatra":{"number":16,"name":"Viśākhā","pada":1,"moon_longitude":203.0301,"elapsed_within_degrees":3.0301},"yoga":{"number":18,"name":"Varīyān","sum_longitude":236.4692},"karana":{"half_tithi_index":28,"name":"Viṣṭi"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.461,"elongation":169.591},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.461,"opposition_distance":10.409}},"eclipse_window_40days":[]},"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":"06:09","sunsetLocal":"19:24","solarNoonLocal":"12:46","dayLengthHours":13.251467422435178,"dayLengthDisplay":"13 Hours 15 Mins 05 Secs","nightLengthDisplay":"10 Hours 44 Mins 55 Secs","moonriseLocal":"18:30","moonsetLocal":"05:38","rahuKala":{"name":"Rāhu Kāla","start":"07:48","end":"09:27","startHours":7.798700013412316,"endHours":9.455133441216713,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:07","end":"12:46","startHours":11.111566869021111,"endHours":12.768000296825509,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:25","end":"16:05","startHours":14.424433724629905,"endHours":16.0808671524343,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:14","end":"09:41","startHours":9.234275650842793,"endHours":9.675991231590633,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:42","end":"07:03","startHours":6.694411061542718,"endHours":7.047783526140989,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:20","end":"13:13","startHours":12.326284716077668,"endHours":13.209715877573347,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:23","end":"05:16","startHours":4.375404262616562,"endHours":5.25883542411224,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:02","end":"06:09","startHours":5.03797763373832,"endHours":6.142266585607919,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:59","end":"15:52","startHours":14.976578200564704,"endHours":15.860009362060383,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:12","end":"19:36","startHours":19.193734008043098,"endHours":19.593734008043096,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:24","end":"19:57","startHours":19.393734008043097,"endHours":19.945878483977896,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:09","end":"20:54","startHours":19.143734008043097,"endHours":20.893734008043097,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:20","end":"01:13","startHours":24.326284716077666,"endHours":25.209715877573345,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:09","end":"07:48","startHours":6.142266585607919,"endHours":7.798700013412316,"quality":"auspicious"},{"name":"Kāla","start":"07:48","end":"09:27","startHours":7.798700013412316,"endHours":9.455133441216713,"quality":"inauspicious"},{"name":"Śubha","start":"09:27","end":"11:07","startHours":9.455133441216713,"endHours":11.111566869021111,"quality":"auspicious"},{"name":"Roga","start":"11:07","end":"12:46","startHours":11.111566869021111,"endHours":12.768000296825509,"quality":"inauspicious"},{"name":"Udveg","start":"12:46","end":"14:25","startHours":12.768000296825509,"endHours":14.424433724629905,"quality":"inauspicious"},{"name":"Chala","start":"14:25","end":"16:05","startHours":14.424433724629905,"endHours":16.0808671524343,"quality":"neutral"},{"name":"Labha","start":"16:05","end":"17:44","startHours":16.0808671524343,"endHours":17.7373005802387,"quality":"auspicious"},{"name":"Amṛta","start":"17:44","end":"19:24","startHours":17.7373005802387,"endHours":19.393734008043097,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:24","end":"20:44","startHours":19.393734008043097,"endHours":20.7373005802387,"quality":"neutral"},{"name":"Labha","start":"20:44","end":"22:05","startHours":20.7373005802387,"endHours":22.0808671524343,"quality":"auspicious"},{"name":"Amṛta","start":"22:05","end":"23:25","startHours":22.0808671524343,"endHours":23.424433724629907,"quality":"auspicious"},{"name":"Kāla","start":"23:25","end":"00:46","startHours":23.424433724629907,"endHours":24.76800029682551,"quality":"inauspicious"},{"name":"Śubha","start":"00:46","end":"02:07","startHours":24.76800029682551,"endHours":26.11156686902111,"quality":"auspicious"},{"name":"Roga","start":"02:07","end":"03:27","startHours":26.11156686902111,"endHours":27.455133441216713,"quality":"inauspicious"},{"name":"Udveg","start":"03:27","end":"04:48","startHours":27.455133441216713,"endHours":28.798700013412315,"quality":"inauspicious"},{"name":"Chala","start":"04:48","end":"06:09","startHours":28.798700013412315,"endHours":30.14226658560792,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:09","end":"07:09","startHours":6.142266585607919,"endHours":7.142266585607919,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:09","end":"08:09","startHours":7.142266585607919,"endHours":8.142266585607919,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:09","end":"09:09","startHours":8.142266585607919,"endHours":9.142266585607919,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:09","end":"10:09","startHours":9.142266585607919,"endHours":10.142266585607919,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:09","end":"11:09","startHours":10.142266585607919,"endHours":11.142266585607919,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:09","end":"12:09","startHours":11.142266585607919,"endHours":12.142266585607919,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:09","end":"13:09","startHours":12.142266585607919,"endHours":13.142266585607919,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:09","end":"14:09","startHours":13.142266585607919,"endHours":14.142266585607919,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:09","end":"15:09","startHours":14.142266585607919,"endHours":15.142266585607919,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:09","end":"16:09","startHours":15.142266585607919,"endHours":16.14226658560792,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:09","end":"17:09","startHours":16.14226658560792,"endHours":17.14226658560792,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:09","end":"18:09","startHours":17.14226658560792,"endHours":18.14226658560792,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:09","end":"19:09","startHours":18.14226658560792,"endHours":19.14226658560792,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:09","end":"20:09","startHours":19.14226658560792,"endHours":20.14226658560792,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:09","end":"21:09","startHours":20.14226658560792,"endHours":21.14226658560792,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:09","end":"22:09","startHours":21.14226658560792,"endHours":22.14226658560792,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:09","end":"23:09","startHours":22.14226658560792,"endHours":23.14226658560792,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:09","end":"00:09","startHours":23.14226658560792,"endHours":24.14226658560792,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:09","end":"01:09","startHours":24.14226658560792,"endHours":25.14226658560792,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:09","end":"02:09","startHours":25.14226658560792,"endHours":26.14226658560792,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:09","end":"03:09","startHours":26.14226658560792,"endHours":27.14226658560792,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:09","end":"04:09","startHours":27.14226658560792,"endHours":28.14226658560792,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:09","end":"05:09","startHours":28.14226658560792,"endHours":29.14226658560792,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:09","end":"06:09","startHours":29.14226658560792,"endHours":30.14226658560792,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"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":"Śubha","quality":"Auspicious"},"drikRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":19.49106684363513,"eotMinutes":3.6891821904695723,"ayanamsa":23.5928}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Śukla Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Śukla Pūrṇimā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"jyeshtha-purnima","name":"Jyeṣṭha Pūrṇimā (Vaṭa Sāvitrī)","name_sanskrit":"ज्येष्ठ पूर्णिमा","tradition":"Pan-Hindu","significance":"Vaṭa Sāvitrī Pūrṇimā in some traditions (others observe Amāvasyā).","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Jyeṣṭha"},"precedence":3},{"id":"vrishabha-sankranti","name":"Vṛṣabha Saṅkrānti","name_sanskrit":"वृषभ सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Taurus.","vrata":false,"detection":{"sun_rashi":"Vṛṣabha"},"precedence":5}],"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":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Śukla Pūrṇimā + Viśākhā","url":"/day/-0562-04-11","relevance":1},{"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}]},"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 May 18, 1981 CE · Jamnagar, Gujarat · Vidhyamitra","description":"May 18, 1981 CE for Jamnagar, Gujarat: Śukla Pūrṇimā, sūryodaya 06:09, sūryāsta 19:24.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/jamnagar/1981-05-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/jamnagar/1981-05-18","sa":"https://sa.vidhyamitra.com/city/jamnagar/1981-05-18","hi":"https://hi.vidhyamitra.com/city/jamnagar/1981-05-18","x-default":"https://vidhyamitra.com/city/jamnagar/1981-05-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T17:57:54.181Z","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":"2026-05-18T17:57:54.181Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T17:57:54.181Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}