{"id":"vidhyamitra:city-day:bhavnagar:1981-03-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/bhavnagar/1981-03-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-03-18","date_display":"March 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":3,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444681.770833,"kali_year":5082,"ahargana":1856216.2708,"sun":{"sidereal_longitude":333.9932,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":124.2965,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":150.3033,"elapsed_within_tithi_degrees":6.3033},"nakshatra":{"number":10,"name":"Maghā","pada":2,"moon_longitude":124.2965,"elapsed_within_degrees":4.2965},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":98.2897},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":3,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444681.770833,"ahargana":1856216.2708,"kali_year":5082,"ayanamsa_lahiri":23.5905,"grahas":{"sun":{"sidereal_longitude":333.771336,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":124.15713600000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false,"latitude":1.2065},"mars":{"sidereal_longitude":337.402236,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":306.55563600000005,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":163.03213600000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"venus":{"sidereal_longitude":328.90573599999993,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":163.343436,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":108.7292,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":288.7292,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"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":3,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444681.770833,"kali_year":5082,"ahargana":1856216.2708,"sun":{"sidereal_longitude":333.9932,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":124.2965,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":150.3033,"elapsed_within_tithi_degrees":6.3033},"nakshatra":{"number":10,"name":"Maghā","pada":2,"moon_longitude":124.2965,"elapsed_within_degrees":4.2965},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":98.2897},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.207,"elongation":150.303},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.207,"opposition_distance":29.697}},"eclipse_window_40days":[]},"city":{"slug":"bhavnagar","name":"Bhavnagar, Gujarat","lat":21.7645,"lon":72.1519,"tz_offset_hours":5.5,"state":"Gujarat","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"bhavnagar","name":"Bhavnagar, Gujarat","lat":21.7645,"lon":72.1519,"tz_offset_hours":5.5,"state":"Gujarat","country":"IN","tier":"tier-1"},"sunriseLocal":"06:48","sunsetLocal":"18:52","solarNoonLocal":"12:50","dayLengthHours":12.063761351539396,"dayLengthDisplay":"12 Hours 03 Mins 50 Secs","nightLengthDisplay":"11 Hours 56 Mins 10 Secs","moonriseLocal":"16:29","moonsetLocal":"05:14","rahuKala":{"name":"Rāhu Kāla","start":"12:50","end":"14:21","startHours":12.835938233991882,"endHours":14.343908402934307,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:19","end":"09:49","startHours":8.31202772716461,"endHours":9.819997896107035,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"11:20","end":"12:50","startHours":11.327968065049458,"endHours":12.835938233991882,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:37","end":"10:01","startHours":9.61893520691471,"endHours":10.021060585299358,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:18","end":"07:38","startHours":7.306714281202993,"endHours":7.62841458391071,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:26","end":"13:14","startHours":12.433812855607238,"endHours":13.23806361237653,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:12","end":"06:00","startHours":5.195556044683599,"endHours":5.999806801452892,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:48","end":"06:48","startHours":5.798744112260569,"endHours":6.804057558222185,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:51","end":"15:39","startHours":14.846565125915115,"endHours":15.650815882684407,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:40","end":"19:04","startHours":18.667818909761582,"endHours":19.06781890976158,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:52","end":"19:22","startHours":18.86781890976158,"endHours":19.37047563274239,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:37","end":"20:22","startHours":18.61781890976158,"endHours":20.36781890976158,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:26","end":"01:14","startHours":24.433812855607236,"endHours":25.23806361237653,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:48","end":"08:19","startHours":6.804057558222185,"endHours":8.31202772716461,"quality":"auspicious"},{"name":"Amṛta","start":"08:19","end":"09:49","startHours":8.31202772716461,"endHours":9.819997896107035,"quality":"auspicious"},{"name":"Kāla","start":"09:49","end":"11:20","startHours":9.819997896107035,"endHours":11.327968065049458,"quality":"inauspicious"},{"name":"Śubha","start":"11:20","end":"12:50","startHours":11.327968065049458,"endHours":12.835938233991882,"quality":"auspicious"},{"name":"Roga","start":"12:50","end":"14:21","startHours":12.835938233991882,"endHours":14.343908402934307,"quality":"inauspicious"},{"name":"Udveg","start":"14:21","end":"15:51","startHours":14.343908402934307,"endHours":15.851878571876732,"quality":"inauspicious"},{"name":"Chala","start":"15:51","end":"17:22","startHours":15.851878571876732,"endHours":17.359848740819157,"quality":"neutral"},{"name":"Labha","start":"17:22","end":"18:52","startHours":17.359848740819157,"endHours":18.86781890976158,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:52","end":"20:22","startHours":18.86781890976158,"endHours":20.359848740819157,"quality":"inauspicious"},{"name":"Chala","start":"20:22","end":"21:51","startHours":20.359848740819157,"endHours":21.851878571876732,"quality":"neutral"},{"name":"Labha","start":"21:51","end":"23:21","startHours":21.851878571876732,"endHours":23.343908402934307,"quality":"auspicious"},{"name":"Amṛta","start":"23:21","end":"00:50","startHours":23.343908402934307,"endHours":24.835938233991882,"quality":"auspicious"},{"name":"Kāla","start":"00:50","end":"02:20","startHours":24.835938233991882,"endHours":26.327968065049458,"quality":"inauspicious"},{"name":"Śubha","start":"02:20","end":"03:49","startHours":26.327968065049458,"endHours":27.819997896107033,"quality":"auspicious"},{"name":"Roga","start":"03:49","end":"05:19","startHours":27.819997896107033,"endHours":29.31202772716461,"quality":"inauspicious"},{"name":"Udveg","start":"05:19","end":"06:48","startHours":29.31202772716461,"endHours":30.804057558222183,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:48","end":"07:48","startHours":6.804057558222185,"endHours":7.804057558222185,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:48","end":"08:48","startHours":7.804057558222185,"endHours":8.804057558222185,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:48","end":"09:48","startHours":8.804057558222185,"endHours":9.804057558222185,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:48","end":"10:48","startHours":9.804057558222185,"endHours":10.804057558222185,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:48","end":"11:48","startHours":10.804057558222185,"endHours":11.804057558222185,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:48","end":"12:48","startHours":11.804057558222185,"endHours":12.804057558222185,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:48","end":"13:48","startHours":12.804057558222185,"endHours":13.804057558222185,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:48","end":"14:48","startHours":13.804057558222185,"endHours":14.804057558222185,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:48","end":"15:48","startHours":14.804057558222185,"endHours":15.804057558222185,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:48","end":"16:48","startHours":15.804057558222185,"endHours":16.804057558222183,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:48","end":"17:48","startHours":16.804057558222183,"endHours":17.804057558222183,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:48","end":"18:48","startHours":17.804057558222183,"endHours":18.804057558222183,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:48","end":"19:48","startHours":18.804057558222183,"endHours":19.804057558222183,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:48","end":"20:48","startHours":19.804057558222183,"endHours":20.804057558222183,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:48","end":"21:48","startHours":20.804057558222183,"endHours":21.804057558222183,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:48","end":"22:48","startHours":21.804057558222183,"endHours":22.804057558222183,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:48","end":"23:48","startHours":22.804057558222183,"endHours":23.804057558222183,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:48","end":"00:48","startHours":23.804057558222183,"endHours":24.804057558222183,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:48","end":"01:48","startHours":24.804057558222183,"endHours":25.804057558222183,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:48","end":"02:48","startHours":25.804057558222183,"endHours":26.804057558222183,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:48","end":"03:48","startHours":26.804057558222183,"endHours":27.804057558222183,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:48","end":"04:48","startHours":27.804057558222183,"endHours":28.804057558222183,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:48","end":"05:48","startHours":28.804057558222183,"endHours":29.804057558222183,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:48","end":"06:48","startHours":29.804057558222183,"endHours":30.804057558222183,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"West","rahuVasa":"South-West","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-1.048971332567223,"eotMinutes":-8.763894039513033,"ayanamsa":23.5905}},"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","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Phālguna","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Śukla Trayodaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"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":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"bhavnagar"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga March 18, 1981 CE · Bhavnagar, Gujarat · Vidhyamitra","description":"March 18, 1981 CE for Bhavnagar, Gujarat: Śukla Trayodaśī, sūryodaya 06:48, sūryāsta 18:52.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/bhavnagar/1981-03-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/bhavnagar/1981-03-18","sa":"https://sa.vidhyamitra.com/city/bhavnagar/1981-03-18","hi":"https://hi.vidhyamitra.com/city/bhavnagar/1981-03-18","x-default":"https://vidhyamitra.com/city/bhavnagar/1981-03-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T20:57:58.957Z","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":"2026-06-02T20:57:58.957Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T20:57:58.957Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}