{"id":"vidhyamitra:city-day:mauritius:1981-05-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mauritius/1981-05-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-05-31","date_display":"May 31, 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":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444755.770833,"kali_year":5083,"ahargana":1856290.2708,"sun":{"sidereal_longitude":45.8448,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":13.2731,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":327.4283,"elapsed_within_tithi_degrees":3.4283},"nakshatra":{"number":1,"name":"Aśvinī","pada":4,"moon_longitude":13.2731,"elapsed_within_degrees":13.2731},"yoga":{"number":5,"name":"Śobhana","sum_longitude":59.1178},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444755.770833,"ahargana":1856290.2708,"kali_year":5083,"ayanamsa_lahiri":23.5933,"grahas":{"sun":{"sidereal_longitude":45.92130900000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":11.215209000000016,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false,"latitude":-4.4984},"mars":{"sidereal_longitude":32.92820899999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":68.67820899999998,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":157.05770900000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":60.281109000000015,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":159.17800899999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":104.8084,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":284.8084,"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":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444755.770833,"kali_year":5083,"ahargana":1856290.2708,"sun":{"sidereal_longitude":45.8448,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":13.2731,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":327.4283,"elapsed_within_tithi_degrees":3.4283},"nakshatra":{"number":1,"name":"Aśvinī","pada":4,"moon_longitude":13.2731,"elapsed_within_degrees":13.2731},"yoga":{"number":5,"name":"Śobhana","sum_longitude":59.1178},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.498,"elongation":32.572},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.498,"opposition_distance":147.428}},"eclipse_window_40days":[]},"city":{"slug":"mauritius","name":"Port Louis, Mauritius","lat":-20.1609,"lon":57.5012,"tz_offset_hours":4,"country":"MU","tier":"diaspora"},"tier2":{"city":{"slug":"mauritius","name":"Port Louis, Mauritius","lat":-20.1609,"lon":57.5012,"tz_offset_hours":4,"country":"MU","tier":"diaspora"},"sunriseLocal":"06:38","sunsetLocal":"17:37","solarNoonLocal":"12:07","dayLengthHours":10.998513552198403,"dayLengthDisplay":"10 Hours 59 Mins 55 Secs","nightLengthDisplay":"13 Hours 00 Mins 05 Secs","moonriseLocal":"04:06","moonsetLocal":"15:32","rahuKala":{"name":"Rāhu Kāla","start":"16:15","end":"17:37","startHours":16.249369802772073,"endHours":17.624183996796873,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:07","end":"13:30","startHours":12.124927220697671,"endHours":13.499741414722472,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:52","end":"16:15","startHours":14.874555608747272,"endHours":16.249369802772073,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:12","end":"09:34","startHours":9.191990273444762,"endHours":9.558607391851377,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:05","end":"07:23","startHours":7.083941842606737,"endHours":7.3772355373320275,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:45","end":"12:29","startHours":11.758310102291057,"endHours":12.491544339104285,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:10","end":"05:54","startHours":5.159201970972016,"endHours":5.892436207785242,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:43","end":"06:38","startHours":5.709127648581936,"endHours":6.6256704445984695,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:57","end":"14:41","startHours":13.958012812730738,"endHours":14.691247049543964,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:25","end":"17:49","startHours":17.424183996796874,"endHours":17.824183996796872,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:37","end":"18:05","startHours":17.624183996796873,"endHours":18.08245539480514,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:22","end":"19:07","startHours":17.374183996796873,"endHours":19.124183996796873,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:45","end":"00:29","startHours":23.75831010229106,"endHours":24.491544339104284,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:38","end":"08:00","startHours":6.6256704445984695,"endHours":8.00048463862327,"quality":"inauspicious"},{"name":"Chala","start":"08:00","end":"09:23","startHours":8.00048463862327,"endHours":9.37529883264807,"quality":"neutral"},{"name":"Labha","start":"09:23","end":"10:45","startHours":9.37529883264807,"endHours":10.75011302667287,"quality":"auspicious"},{"name":"Amṛta","start":"10:45","end":"12:07","startHours":10.75011302667287,"endHours":12.124927220697671,"quality":"auspicious"},{"name":"Kāla","start":"12:07","end":"13:30","startHours":12.124927220697671,"endHours":13.499741414722472,"quality":"inauspicious"},{"name":"Śubha","start":"13:30","end":"14:52","startHours":13.499741414722472,"endHours":14.874555608747272,"quality":"auspicious"},{"name":"Roga","start":"14:52","end":"16:15","startHours":14.874555608747272,"endHours":16.249369802772073,"quality":"inauspicious"},{"name":"Udveg","start":"16:15","end":"17:37","startHours":16.249369802772073,"endHours":17.624183996796873,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:37","end":"19:15","startHours":17.624183996796873,"endHours":19.249369802772073,"quality":"auspicious"},{"name":"Roga","start":"19:15","end":"20:52","startHours":19.249369802772073,"endHours":20.874555608747272,"quality":"inauspicious"},{"name":"Udveg","start":"20:52","end":"22:30","startHours":20.874555608747272,"endHours":22.49974141472247,"quality":"inauspicious"},{"name":"Chala","start":"22:30","end":"00:07","startHours":22.49974141472247,"endHours":24.12492722069767,"quality":"neutral"},{"name":"Labha","start":"00:07","end":"01:45","startHours":24.12492722069767,"endHours":25.75011302667287,"quality":"auspicious"},{"name":"Amṛta","start":"01:45","end":"03:23","startHours":25.75011302667287,"endHours":27.37529883264807,"quality":"auspicious"},{"name":"Kāla","start":"03:23","end":"05:00","startHours":27.37529883264807,"endHours":29.00048463862327,"quality":"inauspicious"},{"name":"Śubha","start":"05:00","end":"06:38","startHours":29.00048463862327,"endHours":30.62567044459847,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:38","end":"07:38","startHours":6.6256704445984695,"endHours":7.6256704445984695,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:38","end":"08:38","startHours":7.6256704445984695,"endHours":8.62567044459847,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:38","end":"09:38","startHours":8.62567044459847,"endHours":9.62567044459847,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:38","end":"10:38","startHours":9.62567044459847,"endHours":10.62567044459847,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:38","end":"11:38","startHours":10.62567044459847,"endHours":11.62567044459847,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:38","end":"12:38","startHours":11.62567044459847,"endHours":12.62567044459847,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:38","end":"13:38","startHours":12.62567044459847,"endHours":13.62567044459847,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:38","end":"14:38","startHours":13.62567044459847,"endHours":14.62567044459847,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:38","end":"15:38","startHours":14.62567044459847,"endHours":15.62567044459847,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:38","end":"16:38","startHours":15.62567044459847,"endHours":16.62567044459847,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:38","end":"17:38","startHours":16.62567044459847,"endHours":17.62567044459847,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:38","end":"18:38","startHours":17.62567044459847,"endHours":18.62567044459847,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:38","end":"19:38","startHours":18.62567044459847,"endHours":19.62567044459847,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:38","end":"20:38","startHours":19.62567044459847,"endHours":20.62567044459847,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:38","end":"21:38","startHours":20.62567044459847,"endHours":21.62567044459847,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:38","end":"22:38","startHours":21.62567044459847,"endHours":22.62567044459847,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:38","end":"23:38","startHours":22.62567044459847,"endHours":23.62567044459847,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:38","end":"00:38","startHours":23.62567044459847,"endHours":24.62567044459847,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:38","end":"01:38","startHours":24.62567044459847,"endHours":25.62567044459847,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:38","end":"02:38","startHours":25.62567044459847,"endHours":26.62567044459847,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:38","end":"03:38","startHours":26.62567044459847,"endHours":27.62567044459847,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:38","end":"04:38","startHours":27.62567044459847,"endHours":28.62567044459847,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:38","end":"05:38","startHours":28.62567044459847,"endHours":29.62567044459847,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:38","end":"06:38","startHours":29.62567044459847,"endHours":30.62567044459847,"planetary_lord":"Jupiter"}],"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":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"tropicalRitu":"Grīṣma (Summer) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":21.874847874387562,"eotMinutes":2.4995667581397525,"ayanamsa":23.5933}},"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 Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Jyeṣṭha","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":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa 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":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"mauritius"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga May 31, 1981 CE · Port Louis, Mauritius · Vidhyamitra","description":"May 31, 1981 CE for Port Louis, Mauritius: Kṛṣṇa Trayodaśī, sūryodaya 06:38, sūryāsta 17:37.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mauritius/1981-05-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mauritius/1981-05-31","sa":"https://sa.vidhyamitra.com/city/mauritius/1981-05-31","hi":"https://hi.vidhyamitra.com/city/mauritius/1981-05-31","x-default":"https://vidhyamitra.com/city/mauritius/1981-05-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T23:59:41.909Z","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":"2026-06-01T23:59:41.909Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T23:59:41.909Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}