{"id":"vidhyamitra:city-day:perth:2023-05-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2023-05-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2023-05-20","date_display":"May 20, 2023 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":2023,"month":5,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2460084.770833,"kali_year":5125,"ahargana":1871619.2708,"sun":{"sidereal_longitude":34.5222,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":41.1431,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":6.6209,"elapsed_within_tithi_degrees":6.6209},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1,"moon_longitude":41.1431,"elapsed_within_degrees":1.1431},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":75.6653},"karana":{"half_tithi_index":1,"name":"Bava"},"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":2023,"month":5,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2460084.770833,"ahargana":1871619.2708,"kali_year":5125,"ayanamsa_lahiri":24.1796,"grahas":{"sun":{"sidereal_longitude":34.621227999999974,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":39.21332799999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false,"latitude":2.1482},"mars":{"sidereal_longitude":95.15392800000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":12.155627999999979,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":6.602528000000007,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"venus":{"sidereal_longitude":78.92332799999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":312.439528,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":12.6042,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":192.6042,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","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":2023,"month":5,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2460084.770833,"kali_year":5125,"ahargana":1871619.2708,"sun":{"sidereal_longitude":34.5222,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":41.1431,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":6.6209,"elapsed_within_tithi_degrees":6.6209},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1,"moon_longitude":41.1431,"elapsed_within_degrees":1.1431},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":75.6653},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.148,"elongation":6.621},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.148,"opposition_distance":173.379}},"eclipse_window_40days":[{"offset_days":-14,"type":"lunar","occurs":true,"moon_latitude":-0.836,"opposition_distance":2.976}]},"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":"07:01","sunsetLocal":"17:25","solarNoonLocal":"12:13","dayLengthHours":10.40386754117933,"dayLengthDisplay":"10 Hours 24 Mins 14 Secs","nightLengthDisplay":"13 Hours 35 Mins 46 Secs","moonriseLocal":"07:23","moonsetLocal":"17:39","rahuKala":{"name":"Rāhu Kāla","start":"09:37","end":"10:55","startHours":9.615027897768744,"endHours":10.915511340416161,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:31","end":"14:49","startHours":13.516478225710994,"endHours":14.81696166835841,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:01","end":"08:19","startHours":7.0140610124739124,"endHours":8.314544455121329,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:47","startHours":9.441630105415756,"endHours":9.788425690121734,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:27","end":"07:43","startHours":7.447555493356385,"endHours":7.724991961121167,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.8691991983576,"endHours":12.562790367769557,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:38","end":"06:19","startHours":5.626878673650001,"endHours":6.320469843061957,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:09","end":"07:01","startHours":6.147072050708968,"endHours":7.0140610124739124,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:57","end":"14:39","startHours":13.949972706593467,"endHours":14.643563876005423,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:13","end":"17:37","startHours":17.217928553653245,"endHours":17.617928553653243,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:25","end":"17:51","startHours":17.417928553653244,"endHours":17.851423034535717,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:10","end":"18:55","startHours":17.167928553653244,"endHours":18.917928553653244,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.869199198357602,"endHours":24.562790367769555,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"07:01","end":"08:19","startHours":7.0140610124739124,"endHours":8.314544455121329,"quality":"inauspicious"},{"name":"Śubha","start":"08:19","end":"09:37","startHours":8.314544455121329,"endHours":9.615027897768744,"quality":"auspicious"},{"name":"Roga","start":"09:37","end":"10:55","startHours":9.615027897768744,"endHours":10.915511340416161,"quality":"inauspicious"},{"name":"Udveg","start":"10:55","end":"12:13","startHours":10.915511340416161,"endHours":12.215994783063579,"quality":"inauspicious"},{"name":"Chala","start":"12:13","end":"13:31","startHours":12.215994783063579,"endHours":13.516478225710994,"quality":"neutral"},{"name":"Labha","start":"13:31","end":"14:49","startHours":13.516478225710994,"endHours":14.81696166835841,"quality":"auspicious"},{"name":"Amṛta","start":"14:49","end":"16:07","startHours":14.81696166835841,"endHours":16.11744511100583,"quality":"auspicious"},{"name":"Kāla","start":"16:07","end":"17:25","startHours":16.11744511100583,"endHours":17.417928553653244,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:25","end":"19:07","startHours":17.417928553653244,"endHours":19.11744511100583,"quality":"auspicious"},{"name":"Amṛta","start":"19:07","end":"20:49","startHours":19.11744511100583,"endHours":20.81696166835841,"quality":"auspicious"},{"name":"Kāla","start":"20:49","end":"22:31","startHours":20.81696166835841,"endHours":22.516478225710994,"quality":"inauspicious"},{"name":"Śubha","start":"22:31","end":"00:13","startHours":22.516478225710994,"endHours":24.21599478306358,"quality":"auspicious"},{"name":"Roga","start":"00:13","end":"01:55","startHours":24.21599478306358,"endHours":25.915511340416163,"quality":"inauspicious"},{"name":"Udveg","start":"01:55","end":"03:37","startHours":25.915511340416163,"endHours":27.615027897768748,"quality":"inauspicious"},{"name":"Chala","start":"03:37","end":"05:19","startHours":27.615027897768748,"endHours":29.31454445512133,"quality":"neutral"},{"name":"Labha","start":"05:19","end":"07:01","startHours":29.31454445512133,"endHours":31.014061012473913,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:01","end":"08:01","startHours":7.0140610124739124,"endHours":8.014061012473913,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"08:01","end":"09:01","startHours":8.014061012473913,"endHours":9.014061012473913,"planetary_lord":"Moon"},{"name":"Hora 3","start":"09:01","end":"10:01","startHours":9.014061012473913,"endHours":10.014061012473913,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"10:01","end":"11:01","startHours":10.014061012473913,"endHours":11.014061012473913,"planetary_lord":"Venus"},{"name":"Hora 5","start":"11:01","end":"12:01","startHours":11.014061012473913,"endHours":12.014061012473913,"planetary_lord":"Sun"},{"name":"Hora 6","start":"12:01","end":"13:01","startHours":12.014061012473913,"endHours":13.014061012473913,"planetary_lord":"Mars"},{"name":"Hora 7","start":"13:01","end":"14:01","startHours":13.014061012473913,"endHours":14.014061012473913,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"14:01","end":"15:01","startHours":14.014061012473913,"endHours":15.014061012473913,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"15:01","end":"16:01","startHours":15.014061012473913,"endHours":16.014061012473913,"planetary_lord":"Moon"},{"name":"Hora 10","start":"16:01","end":"17:01","startHours":16.014061012473913,"endHours":17.014061012473913,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"17:01","end":"18:01","startHours":17.014061012473913,"endHours":18.014061012473913,"planetary_lord":"Venus"},{"name":"Hora 12","start":"18:01","end":"19:01","startHours":18.014061012473913,"endHours":19.014061012473913,"planetary_lord":"Sun"},{"name":"Hora 13","start":"19:01","end":"20:01","startHours":19.014061012473913,"endHours":20.014061012473913,"planetary_lord":"Mars"},{"name":"Hora 14","start":"20:01","end":"21:01","startHours":20.014061012473913,"endHours":21.014061012473913,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"21:01","end":"22:01","startHours":21.014061012473913,"endHours":22.014061012473913,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"22:01","end":"23:01","startHours":22.014061012473913,"endHours":23.014061012473913,"planetary_lord":"Moon"},{"name":"Hora 17","start":"23:01","end":"00:01","startHours":23.014061012473913,"endHours":24.014061012473913,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"00:01","end":"01:01","startHours":24.014061012473913,"endHours":25.014061012473913,"planetary_lord":"Venus"},{"name":"Hora 19","start":"01:01","end":"02:01","startHours":25.014061012473913,"endHours":26.014061012473913,"planetary_lord":"Sun"},{"name":"Hora 20","start":"02:01","end":"03:01","startHours":26.014061012473913,"endHours":27.014061012473913,"planetary_lord":"Mars"},{"name":"Hora 21","start":"03:01","end":"04:01","startHours":27.014061012473913,"endHours":28.014061012473913,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"04:01","end":"05:01","startHours":28.014061012473913,"endHours":29.014061012473913,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"05:01","end":"06:01","startHours":29.014061012473913,"endHours":30.014061012473913,"planetary_lord":"Moon"},{"name":"Hora 24","start":"06:01","end":"07:01","startHours":30.014061012473913,"endHours":31.014061012473913,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"East","anandadiYoga":{"name":"Dhātṛ","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":19.88961467980674,"eotMinutes":3.5983130161851964,"ayanamsa":24.1796}},"calendars":{"vikram_samvat":2080,"vikram_samvatsara":"Nala","saka_samvat":1945,"saka_samvatsara":"Śobhana","bengali_samvat":1430,"malayalam_era":1199,"nanakshahi_year":554,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Śukla Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Śukla Pratipada · Vikram 2080 Nala · Śaka 1945 Śobhana"},"festivals":[{"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":"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":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Rohiṇī","url":"/day/-3226-07-09","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 20, 2023 CE · Perth, Australia · Vidhyamitra","description":"May 20, 2023 CE for Perth, Australia: Śukla Pratipada, sūryodaya 07:01, sūryāsta 17:25.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2023-05-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2023-05-20","sa":"https://sa.vidhyamitra.com/city/perth/2023-05-20","hi":"https://hi.vidhyamitra.com/city/perth/2023-05-20","x-default":"https://vidhyamitra.com/city/perth/2023-05-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T04:03:50.795Z","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":"2026-05-15T04:03:50.795Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T04:03:50.795Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}