{"id":"vidhyamitra:city-day:perth:2164-05-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2164-05-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2164-05-20","date_display":"May 20, 2164 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":2164,"month":5,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2511584.770833,"kali_year":5266,"ahargana":1923119.2708,"sun":{"sidereal_longitude":33.1017,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":22.4264,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":349.3247,"elapsed_within_tithi_degrees":1.3247},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3,"moon_longitude":22.4264,"elapsed_within_degrees":9.0931},"yoga":{"number":5,"name":"Śobhana","sum_longitude":55.5282},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"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":2164,"month":5,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2511584.770833,"ahargana":1923119.2708,"kali_year":5266,"ayanamsa_lahiri":26.1493,"grahas":{"sun":{"sidereal_longitude":33.52454999999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":21.509650000000022,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false,"latitude":-2.802},"mars":{"sidereal_longitude":85.43005,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":34.61874999999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":325.11095,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":358.11075,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":237.55545000000006,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":163.8863,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":343.8863,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"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":2164,"month":5,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2511584.770833,"kali_year":5266,"ahargana":1923119.2708,"sun":{"sidereal_longitude":33.1017,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":22.4264,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":349.3247,"elapsed_within_tithi_degrees":1.3247},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3,"moon_longitude":22.4264,"elapsed_within_degrees":9.0931},"yoga":{"number":5,"name":"Śobhana","sum_longitude":55.5282},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.802,"elongation":10.675},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.802,"opposition_distance":169.325}},"eclipse_window_40days":[]},"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":10.385845299192853,"dayLengthDisplay":"10 Hours 23 Mins 09 Secs","nightLengthDisplay":"13 Hours 36 Mins 51 Secs","moonriseLocal":"06:06","moonsetLocal":"16:44","rahuKala":{"name":"Rāhu Kāla","start":"16:07","end":"17:25","startHours":16.110686770260898,"endHours":17.408917432660004,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:13","end":"13:31","startHours":12.215994783063579,"endHours":13.514225445462685,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:49","end":"16:07","startHours":14.812456107861792,"endHours":16.110686770260898,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:27","end":"09:48","startHours":9.44643603661215,"endHours":9.79263087991858,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:27","end":"07:44","startHours":7.455815687600187,"endHours":7.73277156224533,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.86979993975715,"endHours":12.562189626370007,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:38","end":"06:20","startHours":5.638292760241438,"endHours":6.330682446854294,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:09","end":"07:01","startHours":6.1575850252010795,"endHours":7.023072133467151,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:57","end":"14:38","startHours":13.94696899959572,"endHours":14.639358686208578,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:13","end":"17:37","startHours":17.208917432660005,"endHours":17.608917432660004,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:25","end":"17:50","startHours":17.408917432660004,"endHours":17.84166098679304,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:10","end":"18:55","startHours":17.158917432660004,"endHours":18.908917432660004,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.86979993975715,"endHours":24.562189626370007,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"07:01","end":"08:19","startHours":7.023072133467151,"endHours":8.321302795866258,"quality":"inauspicious"},{"name":"Chala","start":"08:19","end":"09:37","startHours":8.321302795866258,"endHours":9.619533458265364,"quality":"neutral"},{"name":"Labha","start":"09:37","end":"10:55","startHours":9.619533458265364,"endHours":10.917764120664472,"quality":"auspicious"},{"name":"Amṛta","start":"10:55","end":"12:13","startHours":10.917764120664472,"endHours":12.215994783063579,"quality":"auspicious"},{"name":"Kāla","start":"12:13","end":"13:31","startHours":12.215994783063579,"endHours":13.514225445462685,"quality":"inauspicious"},{"name":"Śubha","start":"13:31","end":"14:49","startHours":13.514225445462685,"endHours":14.812456107861792,"quality":"auspicious"},{"name":"Roga","start":"14:49","end":"16:07","startHours":14.812456107861792,"endHours":16.110686770260898,"quality":"inauspicious"},{"name":"Udveg","start":"16:07","end":"17:25","startHours":16.110686770260898,"endHours":17.408917432660004,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:25","end":"19:07","startHours":17.408917432660004,"endHours":19.110686770260898,"quality":"auspicious"},{"name":"Roga","start":"19:07","end":"20:49","startHours":19.110686770260898,"endHours":20.81245610786179,"quality":"inauspicious"},{"name":"Udveg","start":"20:49","end":"22:31","startHours":20.81245610786179,"endHours":22.514225445462685,"quality":"inauspicious"},{"name":"Chala","start":"22:31","end":"00:13","startHours":22.514225445462685,"endHours":24.21599478306358,"quality":"neutral"},{"name":"Labha","start":"00:13","end":"01:55","startHours":24.21599478306358,"endHours":25.917764120664472,"quality":"auspicious"},{"name":"Amṛta","start":"01:55","end":"03:37","startHours":25.917764120664472,"endHours":27.619533458265366,"quality":"auspicious"},{"name":"Kāla","start":"03:37","end":"05:19","startHours":27.619533458265366,"endHours":29.32130279586626,"quality":"inauspicious"},{"name":"Śubha","start":"05:19","end":"07:01","startHours":29.32130279586626,"endHours":31.023072133467153,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:01","end":"08:01","startHours":7.023072133467151,"endHours":8.023072133467151,"planetary_lord":"Sun"},{"name":"Hora 2","start":"08:01","end":"09:01","startHours":8.023072133467151,"endHours":9.023072133467151,"planetary_lord":"Mars"},{"name":"Hora 3","start":"09:01","end":"10:01","startHours":9.023072133467151,"endHours":10.023072133467151,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"10:01","end":"11:01","startHours":10.023072133467151,"endHours":11.023072133467151,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"11:01","end":"12:01","startHours":11.023072133467151,"endHours":12.023072133467151,"planetary_lord":"Moon"},{"name":"Hora 6","start":"12:01","end":"13:01","startHours":12.023072133467151,"endHours":13.023072133467151,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"13:01","end":"14:01","startHours":13.023072133467151,"endHours":14.023072133467151,"planetary_lord":"Venus"},{"name":"Hora 8","start":"14:01","end":"15:01","startHours":14.023072133467151,"endHours":15.023072133467151,"planetary_lord":"Sun"},{"name":"Hora 9","start":"15:01","end":"16:01","startHours":15.023072133467151,"endHours":16.023072133467153,"planetary_lord":"Mars"},{"name":"Hora 10","start":"16:01","end":"17:01","startHours":16.023072133467153,"endHours":17.023072133467153,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"17:01","end":"18:01","startHours":17.023072133467153,"endHours":18.023072133467153,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"18:01","end":"19:01","startHours":18.023072133467153,"endHours":19.023072133467153,"planetary_lord":"Moon"},{"name":"Hora 13","start":"19:01","end":"20:01","startHours":19.023072133467153,"endHours":20.023072133467153,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"20:01","end":"21:01","startHours":20.023072133467153,"endHours":21.023072133467153,"planetary_lord":"Venus"},{"name":"Hora 15","start":"21:01","end":"22:01","startHours":21.023072133467153,"endHours":22.023072133467153,"planetary_lord":"Sun"},{"name":"Hora 16","start":"22:01","end":"23:01","startHours":22.023072133467153,"endHours":23.023072133467153,"planetary_lord":"Mars"},{"name":"Hora 17","start":"23:01","end":"00:01","startHours":23.023072133467153,"endHours":24.023072133467153,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"00:01","end":"01:01","startHours":24.023072133467153,"endHours":25.023072133467153,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"01:01","end":"02:01","startHours":25.023072133467153,"endHours":26.023072133467153,"planetary_lord":"Moon"},{"name":"Hora 20","start":"02:01","end":"03:01","startHours":26.023072133467153,"endHours":27.023072133467153,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"03:01","end":"04:01","startHours":27.023072133467153,"endHours":28.023072133467153,"planetary_lord":"Venus"},{"name":"Hora 22","start":"04:01","end":"05:01","startHours":28.023072133467153,"endHours":29.023072133467153,"planetary_lord":"Sun"},{"name":"Hora 23","start":"05:01","end":"06:01","startHours":29.023072133467153,"endHours":30.023072133467153,"planetary_lord":"Mars"},{"name":"Hora 24","start":"06:01","end":"07:01","startHours":30.023072133467153,"endHours":31.023072133467153,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","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":"Kāladaṇḍa","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":20.07859377186688,"eotMinutes":3.5983130161851964,"ayanamsa":26.1493}},"calendars":{"vikram_samvat":2221,"vikram_samvatsara":"Īśvara","saka_samvat":2086,"saka_samvatsara":"Raktākṣī","bengali_samvat":1571,"malayalam_era":1340,"nanakshahi_year":695,"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 Amāvasyā · Vikram 2221 Īśvara · Śaka 2086 Raktākṣī"},"festivals":[{"id":"vat-savitri-amavasya","name":"Vaṭa Sāvitrī Amāvasyā","name_sanskrit":"वट सावित्री अमावस्या","tradition":"Pan-Hindu","associated_deity":"Sāvitrī Devī","significance":"Sāvitrī's redemption of Satyavān from Yama; pati-vrata observance.","vrata":true,"detection":{"tithi_number":30,"tithi_paksha":"Kṛṣṇa","lunar_month":"Jyeṣṭha"},"precedence":2,"sources":["Mahābhārata, Vana Parva — Sāvitrī Upākhyāna"]}],"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":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Kṛṣṇa Amāvasyā","url":"/day/-3137-10-20","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, 2164 CE · Perth, Australia · Vidhyamitra","description":"May 20, 2164 CE for Perth, Australia: Kṛṣṇa Amāvasyā, sūryodaya 07:01, sūryāsta 17:25.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2164-05-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2164-05-20","sa":"https://sa.vidhyamitra.com/city/perth/2164-05-20","hi":"https://hi.vidhyamitra.com/city/perth/2164-05-20","x-default":"https://vidhyamitra.com/city/perth/2164-05-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T23:46:59.896Z","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":"2026-06-01T23:46:59.896Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T23:46:59.896Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}