{"id":"vidhyamitra:city-day:perth:2163-05-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2163-05-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2163-05-18","date_display":"May 18, 2163 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":2163,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2511216.770833,"kali_year":5265,"ahargana":1922751.2708,"sun":{"sidereal_longitude":30.4765,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":205.1656,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":174.6892,"elapsed_within_tithi_degrees":6.6892},"nakshatra":{"number":16,"name":"Viśākhā","pada":2,"moon_longitude":205.1656,"elapsed_within_degrees":5.1656},"yoga":{"number":18,"name":"Varīyān","sum_longitude":235.6421},"karana":{"half_tithi_index":29,"name":"Bava"},"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":2163,"month":5,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2511216.770833,"ahargana":1922751.2708,"kali_year":5265,"ayanamsa_lahiri":26.1352,"grahas":{"sun":{"sidereal_longitude":30.880209999999977,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":206.12140999999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false,"latitude":1.6683},"mars":{"sidereal_longitude":316.18701,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":11.369709999999998,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":293.29781,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"venus":{"sidereal_longitude":15.383109999999988,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":225.58401000000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":183.3847,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":3.3847,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","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":2163,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2511216.770833,"kali_year":5265,"ahargana":1922751.2708,"sun":{"sidereal_longitude":30.4765,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":205.1656,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":174.6892,"elapsed_within_tithi_degrees":6.6892},"nakshatra":{"number":16,"name":"Viśākhā","pada":2,"moon_longitude":205.1656,"elapsed_within_degrees":5.1656},"yoga":{"number":18,"name":"Varīyān","sum_longitude":235.6421},"karana":{"half_tithi_index":29,"name":"Bava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.668,"elongation":174.689},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.668,"opposition_distance":5.311}},"eclipse_window_40days":[{"offset_days":-15,"type":"solar","occurs":true,"moon_latitude":-0.773,"elongation":1.964}]},"city":{"slug":"perth","name":"Perth, Australia","lat":-31.9505,"lon":115.8605,"tz_offset_hours":8,"country":"AU","tier":"diaspora"},"tier2":{"city":{"slug":"perth","name":"Perth, Australia","lat":-31.9505,"lon":115.8605,"tz_offset_hours":8,"country":"AU","tier":"diaspora"},"sunriseLocal":"07:00","sunsetLocal":"17:26","solarNoonLocal":"12:13","dayLengthHours":10.441913372132142,"dayLengthDisplay":"10 Hours 26 Mins 31 Secs","nightLengthDisplay":"13 Hours 33 Mins 29 Secs","moonriseLocal":"17:03","moonsetLocal":"06:44","rahuKala":{"name":"Rāhu Kāla","start":"12:13","end":"13:31","startHours":12.214480296825506,"endHours":13.519719468342023,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:18","end":"09:36","startHours":8.298762782275952,"endHours":9.60400195379247,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:55","end":"12:13","startHours":10.909241125308988,"endHours":12.214480296825506,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:47","startHours":9.429970064256935,"endHours":9.778033843328005,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:26","end":"07:42","startHours":7.428603334598274,"endHours":7.707054357855132,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.866416517754436,"endHours":12.562544075896577,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:36","end":"06:18","startHours":5.601268494475149,"endHours":6.297396052617292,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:07","end":"07:00","startHours":6.123364163081757,"endHours":6.993523610759435,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:57","end":"14:39","startHours":13.954799192180863,"endHours":14.650926750323006,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:14","end":"17:38","startHours":17.235436982891578,"endHours":17.635436982891576,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:26","end":"17:52","startHours":17.435436982891577,"endHours":17.870516706730417,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:11","end":"18:56","startHours":17.185436982891577,"endHours":18.935436982891577,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.866416517754434,"endHours":24.56254407589658,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"07:00","end":"08:18","startHours":6.993523610759435,"endHours":8.298762782275952,"quality":"auspicious"},{"name":"Amṛta","start":"08:18","end":"09:36","startHours":8.298762782275952,"endHours":9.60400195379247,"quality":"auspicious"},{"name":"Kāla","start":"09:36","end":"10:55","startHours":9.60400195379247,"endHours":10.909241125308988,"quality":"inauspicious"},{"name":"Śubha","start":"10:55","end":"12:13","startHours":10.909241125308988,"endHours":12.214480296825506,"quality":"auspicious"},{"name":"Roga","start":"12:13","end":"13:31","startHours":12.214480296825506,"endHours":13.519719468342023,"quality":"inauspicious"},{"name":"Udveg","start":"13:31","end":"14:49","startHours":13.519719468342023,"endHours":14.82495863985854,"quality":"inauspicious"},{"name":"Chala","start":"14:49","end":"16:08","startHours":14.82495863985854,"endHours":16.13019781137506,"quality":"neutral"},{"name":"Labha","start":"16:08","end":"17:26","startHours":16.13019781137506,"endHours":17.435436982891577,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"17:26","end":"19:08","startHours":17.435436982891577,"endHours":19.13019781137506,"quality":"inauspicious"},{"name":"Chala","start":"19:08","end":"20:49","startHours":19.13019781137506,"endHours":20.824958639858544,"quality":"neutral"},{"name":"Labha","start":"20:49","end":"22:31","startHours":20.824958639858544,"endHours":22.519719468342025,"quality":"auspicious"},{"name":"Amṛta","start":"22:31","end":"00:13","startHours":22.519719468342025,"endHours":24.214480296825506,"quality":"auspicious"},{"name":"Kāla","start":"00:13","end":"01:55","startHours":24.214480296825506,"endHours":25.909241125308988,"quality":"inauspicious"},{"name":"Śubha","start":"01:55","end":"03:36","startHours":25.909241125308988,"endHours":27.60400195379247,"quality":"auspicious"},{"name":"Roga","start":"03:36","end":"05:18","startHours":27.60400195379247,"endHours":29.298762782275954,"quality":"inauspicious"},{"name":"Udveg","start":"05:18","end":"07:00","startHours":29.298762782275954,"endHours":30.993523610759436,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:00","end":"08:00","startHours":6.993523610759435,"endHours":7.993523610759435,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"08:00","end":"09:00","startHours":7.993523610759435,"endHours":8.993523610759436,"planetary_lord":"Venus"},{"name":"Hora 3","start":"09:00","end":"10:00","startHours":8.993523610759436,"endHours":9.993523610759436,"planetary_lord":"Sun"},{"name":"Hora 4","start":"10:00","end":"11:00","startHours":9.993523610759436,"endHours":10.993523610759436,"planetary_lord":"Mars"},{"name":"Hora 5","start":"11:00","end":"12:00","startHours":10.993523610759436,"endHours":11.993523610759436,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"12:00","end":"13:00","startHours":11.993523610759436,"endHours":12.993523610759436,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"13:00","end":"14:00","startHours":12.993523610759436,"endHours":13.993523610759436,"planetary_lord":"Moon"},{"name":"Hora 8","start":"14:00","end":"15:00","startHours":13.993523610759436,"endHours":14.993523610759436,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"15:00","end":"16:00","startHours":14.993523610759436,"endHours":15.993523610759436,"planetary_lord":"Venus"},{"name":"Hora 10","start":"16:00","end":"17:00","startHours":15.993523610759436,"endHours":16.993523610759436,"planetary_lord":"Sun"},{"name":"Hora 11","start":"17:00","end":"18:00","startHours":16.993523610759436,"endHours":17.993523610759436,"planetary_lord":"Mars"},{"name":"Hora 12","start":"18:00","end":"19:00","startHours":17.993523610759436,"endHours":18.993523610759436,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"19:00","end":"20:00","startHours":18.993523610759436,"endHours":19.993523610759436,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"20:00","end":"21:00","startHours":19.993523610759436,"endHours":20.993523610759436,"planetary_lord":"Moon"},{"name":"Hora 15","start":"21:00","end":"22:00","startHours":20.993523610759436,"endHours":21.993523610759436,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"22:00","end":"23:00","startHours":21.993523610759436,"endHours":22.993523610759436,"planetary_lord":"Venus"},{"name":"Hora 17","start":"23:00","end":"00:00","startHours":22.993523610759436,"endHours":23.993523610759436,"planetary_lord":"Sun"},{"name":"Hora 18","start":"00:00","end":"01:00","startHours":23.993523610759436,"endHours":24.993523610759436,"planetary_lord":"Mars"},{"name":"Hora 19","start":"01:00","end":"02:00","startHours":24.993523610759436,"endHours":25.993523610759436,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"02:00","end":"03:00","startHours":25.993523610759436,"endHours":26.993523610759436,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"03:00","end":"04:00","startHours":26.993523610759436,"endHours":27.993523610759436,"planetary_lord":"Moon"},{"name":"Hora 22","start":"04:00","end":"05:00","startHours":27.993523610759436,"endHours":28.993523610759436,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"05:00","end":"06:00","startHours":28.993523610759436,"endHours":29.993523610759436,"planetary_lord":"Venus"},{"name":"Hora 24","start":"06:00","end":"07:00","startHours":29.993523610759436,"endHours":30.993523610759436,"planetary_lord":"Sun"}],"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":"North (Uttara)","chandraVasa":"North","rahuVasa":"South-West","anandadiYoga":{"name":"Dhātṛ","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":19.48893189061394,"eotMinutes":3.6891821904695723,"ayanamsa":26.1352}},"calendars":{"vikram_samvat":2220,"vikram_samvatsara":"Dhātṛ","saka_samvat":2085,"saka_samvatsara":"Rudhirodgāri","bengali_samvat":1570,"malayalam_era":1339,"nanakshahi_year":694,"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 Pūrṇimā · Vikram 2220 Dhātṛ · Śaka 2085 Rudhirodgāri"},"festivals":[{"id":"buddha-purnima","name":"Buddha Pūrṇimā","name_sanskrit":"बुद्ध पूर्णिमा","name_alternates":["Vesak","Vaiśākhī Pūrṇimā","Vesakha"],"tradition":"Pan-Hindu","associated_deity":"Buddha (21st avatāra of Krishna per Bhāgavata 1.3.24)","deity_avatara_index":21,"significance":"Buddha's birth, enlightenment, and mahāparinirvāṇa all on this Vaiśākha Pūrṇimā. Most sacred Buddhist + Vaishnava day.","vrata":true,"primary_observance":"Day-long observance of compassion (karuṇā) and ahiṁsā; Buddha-stuti at sunset","detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":1,"related_chart":"buddha","historical_anchor":{"event":"Bhagavān Buddha's birth at Lumbinī","date_julian":"-0562-04-11","location":"Lumbinī, Nepal"},"sources":["Bhāgavata Purāṇa 1.3.24","Pāli Tipiṭaka","Buddhacarita by Aśvaghoṣa"]},{"id":"kurma-jayanti","name":"Kūrma Jayantī","name_sanskrit":"कूर्म जयन्ती","tradition":"Vaishnava","associated_deity":"Kūrma (2nd avatāra of Krishna)","deity_avatara_index":11,"significance":"Kūrma supports Mount Mandara during the Sāgara-mathana (churning of the cosmic ocean).","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":4,"sources":["Bhāgavata 8.7-8"]},{"id":"chandika-jayanti","name":"Chaṇḍikā Jayantī","name_sanskrit":"चण्डिका जयन्ती","tradition":"Shakta","associated_deity":"Devī Chaṇḍikā","significance":"Devī's fierce protective form. Often coincides with Buddha Pūrṇimā.","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":5},{"id":"chitra-paurnami","name":"Citrā Paurṇamī","name_sanskrit":"चित्रा पौर्णमी","tradition":"Regional","significance":"Tamil regional Vaiśākha Pūrṇimā observance; honors Citragupta.","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":6},{"id":"vaishakha-purnima-vrat","name":"Vaiśākha Pūrṇimā Vrat","name_sanskrit":"वैशाख पूर्णिमा व्रत","tradition":"Pan-Hindu","significance":"General Pūrṇimā vrat in Vaiśākha (highly auspicious month).","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":7}],"todays_walk":{"walk":{"id":"buddha-purnima-walk","name":"Buddha Pūrṇimā Walk","name_sanskrit":"बुद्ध पूर्णिमा यात्रा","type":"festival","description":"Bhāgavata 1.3.24 (Buddha as 21st avatāra) + BG 12.13 (compassion) + Dhammapada parallels.","step_count":7,"url":"/walk/buddha-purnima-walk"},"reason":"Today is Buddha Pūrṇimā — its dedicated 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":"perth"},"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, 2163 CE · Perth, Australia · Vidhyamitra","description":"May 18, 2163 CE for Perth, Australia: Śukla Pūrṇimā, sūryodaya 07:00, sūryāsta 17:26.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2163-05-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2163-05-18","sa":"https://sa.vidhyamitra.com/city/perth/2163-05-18","hi":"https://hi.vidhyamitra.com/city/perth/2163-05-18","x-default":"https://vidhyamitra.com/city/perth/2163-05-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-03T09:09:07.629Z","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":"2026-06-03T09:09:07.629Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-03T09:09:07.629Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}