{"id":"vidhyamitra:city-day:bhavnagar:1981-05-16:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/bhavnagar/1981-05-16","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-05-16","date_display":"May 16, 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":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444740.770833,"kali_year":5083,"ahargana":1856275.2708,"sun":{"sidereal_longitude":31.5243,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":177.9217,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":146.3974,"elapsed_within_tithi_degrees":2.3974},"nakshatra":{"number":14,"name":"Citrā","pada":2,"moon_longitude":177.9217,"elapsed_within_degrees":4.5884},"yoga":{"number":16,"name":"Siddhi","sum_longitude":209.446},"karana":{"half_tithi_index":24,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":16,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444740.770833,"ahargana":1856275.2708,"kali_year":5083,"ayanamsa_lahiri":23.5928,"grahas":{"sun":{"sidereal_longitude":31.504981999999984,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":179.15988199999993,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false,"latitude":4.287},"mars":{"sidereal_longitude":22.037581999999986,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":50.73358200000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":157.22428200000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":41.871681999999964,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":159.50458200000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":105.6031,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":285.6031,"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":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444740.770833,"kali_year":5083,"ahargana":1856275.2708,"sun":{"sidereal_longitude":31.5243,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":177.9217,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":146.3974,"elapsed_within_tithi_degrees":2.3974},"nakshatra":{"number":14,"name":"Citrā","pada":2,"moon_longitude":177.9217,"elapsed_within_degrees":4.5884},"yoga":{"number":16,"name":"Siddhi","sum_longitude":209.446},"karana":{"half_tithi_index":24,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.287,"elongation":146.397},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.287,"opposition_distance":33.603}},"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":"06:02","sunsetLocal":"19:13","solarNoonLocal":"12:38","dayLengthHours":13.183712931706339,"dayLengthDisplay":"13 Hours 11 Mins 01 Secs","nightLengthDisplay":"10 Hours 48 Mins 59 Secs","moonriseLocal":"16:40","moonsetLocal":"04:17","rahuKala":{"name":"Rāhu Kāla","start":"09:20","end":"10:59","startHours":9.331557517760292,"endHours":10.979521634223584,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:17","end":"15:55","startHours":14.275449867150169,"endHours":15.923413983613461,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:02","end":"07:41","startHours":6.035629284833708,"endHours":7.683593401297,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:07","end":"09:33","startHours":9.11182896889852,"endHours":9.551286066622065,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:35","end":"06:56","startHours":6.584950656988139,"endHours":6.936516335166974,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:11","end":"13:04","startHours":12.188028652963332,"endHours":13.06694284841042,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:17","end":"05:09","startHours":4.27780089393953,"endHours":5.156715089386618,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:56","end":"06:02","startHours":4.936986540524846,"endHours":6.035629284833708,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:49","end":"15:42","startHours":14.8247712393046,"endHours":15.703685434751689,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:01","end":"19:25","startHours":19.019342216540046,"endHours":19.419342216540045,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:13","end":"19:46","startHours":19.219342216540046,"endHours":19.768663588694476,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:58","end":"20:43","startHours":18.969342216540046,"endHours":20.719342216540046,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:11","end":"01:04","startHours":24.188028652963332,"endHours":25.06694284841042,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:02","end":"07:41","startHours":6.035629284833708,"endHours":7.683593401297,"quality":"inauspicious"},{"name":"Śubha","start":"07:41","end":"09:20","startHours":7.683593401297,"endHours":9.331557517760292,"quality":"auspicious"},{"name":"Roga","start":"09:20","end":"10:59","startHours":9.331557517760292,"endHours":10.979521634223584,"quality":"inauspicious"},{"name":"Udveg","start":"10:59","end":"12:38","startHours":10.979521634223584,"endHours":12.627485750686876,"quality":"inauspicious"},{"name":"Chala","start":"12:38","end":"14:17","startHours":12.627485750686876,"endHours":14.275449867150169,"quality":"neutral"},{"name":"Labha","start":"14:17","end":"15:55","startHours":14.275449867150169,"endHours":15.923413983613461,"quality":"auspicious"},{"name":"Amṛta","start":"15:55","end":"17:34","startHours":15.923413983613461,"endHours":17.571378100076753,"quality":"auspicious"},{"name":"Kāla","start":"17:34","end":"19:13","startHours":17.571378100076753,"endHours":19.219342216540046,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"19:13","end":"20:34","startHours":19.219342216540046,"endHours":20.571378100076753,"quality":"auspicious"},{"name":"Amṛta","start":"20:34","end":"21:55","startHours":20.571378100076753,"endHours":21.92341398361346,"quality":"auspicious"},{"name":"Kāla","start":"21:55","end":"23:17","startHours":21.92341398361346,"endHours":23.27544986715017,"quality":"inauspicious"},{"name":"Śubha","start":"23:17","end":"00:38","startHours":23.27544986715017,"endHours":24.627485750686876,"quality":"auspicious"},{"name":"Roga","start":"00:38","end":"01:59","startHours":24.627485750686876,"endHours":25.979521634223584,"quality":"inauspicious"},{"name":"Udveg","start":"01:59","end":"03:20","startHours":25.979521634223584,"endHours":27.33155751776029,"quality":"inauspicious"},{"name":"Chala","start":"03:20","end":"04:41","startHours":27.33155751776029,"endHours":28.683593401297,"quality":"neutral"},{"name":"Labha","start":"04:41","end":"06:02","startHours":28.683593401297,"endHours":30.035629284833707,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:02","end":"07:02","startHours":6.035629284833708,"endHours":7.035629284833708,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:02","end":"08:02","startHours":7.035629284833708,"endHours":8.035629284833707,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:02","end":"09:02","startHours":8.035629284833707,"endHours":9.035629284833707,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:02","end":"10:02","startHours":9.035629284833707,"endHours":10.035629284833707,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:02","end":"11:02","startHours":10.035629284833707,"endHours":11.035629284833707,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:02","end":"12:02","startHours":11.035629284833707,"endHours":12.035629284833707,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:02","end":"13:02","startHours":12.035629284833707,"endHours":13.035629284833707,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:02","end":"14:02","startHours":13.035629284833707,"endHours":14.035629284833707,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:02","end":"15:02","startHours":14.035629284833707,"endHours":15.035629284833707,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:02","end":"16:02","startHours":15.035629284833707,"endHours":16.035629284833707,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:02","end":"17:02","startHours":16.035629284833707,"endHours":17.035629284833707,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:02","end":"18:02","startHours":17.035629284833707,"endHours":18.035629284833707,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:02","end":"19:02","startHours":18.035629284833707,"endHours":19.035629284833707,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:02","end":"20:02","startHours":19.035629284833707,"endHours":20.035629284833707,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:02","end":"21:02","startHours":20.035629284833707,"endHours":21.035629284833707,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:02","end":"22:02","startHours":21.035629284833707,"endHours":22.035629284833707,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:02","end":"23:02","startHours":22.035629284833707,"endHours":23.035629284833707,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:02","end":"00:02","startHours":23.035629284833707,"endHours":24.035629284833707,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:02","end":"01:02","startHours":24.035629284833707,"endHours":25.035629284833707,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:02","end":"02:02","startHours":25.035629284833707,"endHours":26.035629284833707,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:02","end":"03:02","startHours":26.035629284833707,"endHours":27.035629284833707,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:02","end":"04:02","startHours":27.035629284833707,"endHours":28.035629284833707,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:02","end":"05:02","startHours":28.035629284833707,"endHours":29.035629284833707,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:02","end":"06:02","startHours":29.035629284833707,"endHours":30.035629284833707,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-West","rahuVasa":"East","anandadiYoga":{"name":"Mudgara","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":19.037820603356256,"eotMinutes":3.743254958787478,"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":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha 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":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 May 16, 1981 CE · Bhavnagar, Gujarat · Vidhyamitra","description":"May 16, 1981 CE for Bhavnagar, Gujarat: Śukla Trayodaśī, sūryodaya 06:02, sūryāsta 19:13.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/bhavnagar/1981-05-16","hreflang_alternates":{"en":"https://vidhyamitra.com/city/bhavnagar/1981-05-16","sa":"https://sa.vidhyamitra.com/city/bhavnagar/1981-05-16","hi":"https://hi.vidhyamitra.com/city/bhavnagar/1981-05-16","x-default":"https://vidhyamitra.com/city/bhavnagar/1981-05-16"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T21:29:35.754Z","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":"2026-06-02T21:29:35.754Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T21:29:35.754Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}