{"id":"vidhyamitra:city-day:perth:1966-04-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1966-04-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1966-04-20","date_display":"April 20, 1966 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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1966,"month":4,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439235.770833,"kali_year":5068,"ahargana":1850770.2708,"sun":{"sidereal_longitude":6.3284,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":356.3291,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":350.0007,"elapsed_within_tithi_degrees":2.0007},"nakshatra":{"number":27,"name":"Revatī","pada":3,"moon_longitude":356.3291,"elapsed_within_degrees":9.6624},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":2.6575},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"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":1966,"month":4,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2439235.770833,"ahargana":1850770.2708,"kali_year":5068,"ayanamsa_lahiri":23.3822,"grahas":{"sun":{"sidereal_longitude":6.139212999999984,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":356.806813,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false,"latitude":-2.9479},"mars":{"sidereal_longitude":8.781813,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":339.229213,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":64.42081300000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":320.764813,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":331.897513,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":37.2845,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":217.2845,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1966,"month":4,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439235.770833,"kali_year":5068,"ahargana":1850770.2708,"sun":{"sidereal_longitude":6.3284,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":356.3291,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":350.0007,"elapsed_within_tithi_degrees":2.0007},"nakshatra":{"number":27,"name":"Revatī","pada":3,"moon_longitude":356.3291,"elapsed_within_degrees":9.6624},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":2.6575},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.948,"elongation":9.999},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.948,"opposition_distance":170.001}},"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":"06:40","sunsetLocal":"17:51","solarNoonLocal":"12:16","dayLengthHours":11.17968641070265,"dayLengthDisplay":"11 Hours 10 Mins 47 Secs","nightLengthDisplay":"12 Hours 49 Mins 13 Secs","moonriseLocal":"05:55","moonsetLocal":"17:21","rahuKala":{"name":"Rāhu Kāla","start":"12:16","end":"13:39","startHours":12.25983727557265,"endHours":13.657298076910482,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:04","end":"09:28","startHours":8.067454871559157,"endHours":9.464915672896987,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:52","end":"12:16","startHours":10.862376474234818,"endHours":12.25983727557265,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:17","end":"09:39","startHours":9.278587566051943,"endHours":9.651243779742032,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:08","end":"07:26","startHours":7.135814337333935,"endHours":7.433939308286005,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:53","end":"12:38","startHours":11.887181061882561,"endHours":12.632493489262739,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:11","end":"05:55","startHours":5.179369215460971,"endHours":5.924681642841148,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:44","end":"06:40","startHours":5.7383535359961035,"endHours":6.669994070221325,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:07","end":"14:52","startHours":14.12311834402309,"endHours":14.868430771403267,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:39","end":"18:03","startHours":17.649680480923976,"endHours":18.049680480923975,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:51","end":"18:19","startHours":17.849680480923976,"endHours":18.315500748036587,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:36","end":"19:21","startHours":17.599680480923976,"endHours":19.349680480923976,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:53","end":"00:38","startHours":23.88718106188256,"endHours":24.63249348926274,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:40","end":"08:04","startHours":6.669994070221325,"endHours":8.067454871559157,"quality":"auspicious"},{"name":"Amṛta","start":"08:04","end":"09:28","startHours":8.067454871559157,"endHours":9.464915672896987,"quality":"auspicious"},{"name":"Kāla","start":"09:28","end":"10:52","startHours":9.464915672896987,"endHours":10.862376474234818,"quality":"inauspicious"},{"name":"Śubha","start":"10:52","end":"12:16","startHours":10.862376474234818,"endHours":12.25983727557265,"quality":"auspicious"},{"name":"Roga","start":"12:16","end":"13:39","startHours":12.25983727557265,"endHours":13.657298076910482,"quality":"inauspicious"},{"name":"Udveg","start":"13:39","end":"15:03","startHours":13.657298076910482,"endHours":15.054758878248313,"quality":"inauspicious"},{"name":"Chala","start":"15:03","end":"16:27","startHours":15.054758878248313,"endHours":16.452219679586143,"quality":"neutral"},{"name":"Labha","start":"16:27","end":"17:51","startHours":16.452219679586143,"endHours":17.849680480923976,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"17:51","end":"19:27","startHours":17.849680480923976,"endHours":19.452219679586143,"quality":"inauspicious"},{"name":"Chala","start":"19:27","end":"21:03","startHours":19.452219679586143,"endHours":21.054758878248315,"quality":"neutral"},{"name":"Labha","start":"21:03","end":"22:39","startHours":21.054758878248315,"endHours":22.657298076910482,"quality":"auspicious"},{"name":"Amṛta","start":"22:39","end":"00:16","startHours":22.657298076910482,"endHours":24.25983727557265,"quality":"auspicious"},{"name":"Kāla","start":"00:16","end":"01:52","startHours":24.25983727557265,"endHours":25.862376474234818,"quality":"inauspicious"},{"name":"Śubha","start":"01:52","end":"03:28","startHours":25.862376474234818,"endHours":27.464915672896986,"quality":"auspicious"},{"name":"Roga","start":"03:28","end":"05:04","startHours":27.464915672896986,"endHours":29.067454871559157,"quality":"inauspicious"},{"name":"Udveg","start":"05:04","end":"06:40","startHours":29.067454871559157,"endHours":30.669994070221325,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:40","end":"07:40","startHours":6.669994070221325,"endHours":7.669994070221325,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:40","end":"08:40","startHours":7.669994070221325,"endHours":8.669994070221325,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:40","end":"09:40","startHours":8.669994070221325,"endHours":9.669994070221325,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:40","end":"10:40","startHours":9.669994070221325,"endHours":10.669994070221325,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:40","end":"11:40","startHours":10.669994070221325,"endHours":11.669994070221325,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:40","end":"12:40","startHours":11.669994070221325,"endHours":12.669994070221325,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:40","end":"13:40","startHours":12.669994070221325,"endHours":13.669994070221325,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:40","end":"14:40","startHours":13.669994070221325,"endHours":14.669994070221325,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:40","end":"15:40","startHours":14.669994070221325,"endHours":15.669994070221325,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:40","end":"16:40","startHours":15.669994070221325,"endHours":16.669994070221325,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:40","end":"17:40","startHours":16.669994070221325,"endHours":17.669994070221325,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:40","end":"18:40","startHours":17.669994070221325,"endHours":18.669994070221325,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:40","end":"19:40","startHours":18.669994070221325,"endHours":19.669994070221325,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:40","end":"20:40","startHours":19.669994070221325,"endHours":20.669994070221325,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:40","end":"21:40","startHours":20.669994070221325,"endHours":21.669994070221325,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:40","end":"22:40","startHours":21.669994070221325,"endHours":22.669994070221325,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:40","end":"23:40","startHours":22.669994070221325,"endHours":23.669994070221325,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:40","end":"00:40","startHours":23.669994070221325,"endHours":24.669994070221325,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:40","end":"01:40","startHours":24.669994070221325,"endHours":25.669994070221325,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:40","end":"02:40","startHours":25.669994070221325,"endHours":26.669994070221325,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:40","end":"03:40","startHours":26.669994070221325,"endHours":27.669994070221325,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:40","end":"04:40","startHours":27.669994070221325,"endHours":28.669994070221325,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:40","end":"05:40","startHours":28.669994070221325,"endHours":29.669994070221325,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:40","end":"06:40","startHours":29.669994070221325,"endHours":30.669994070221325,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"South-West","anandadiYoga":{"name":"Chatra","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":11.302106311320681,"eotMinutes":0.9677634656409275,"ayanamsa":23.3822}},"calendars":{"vikram_samvat":2023,"vikram_samvatsara":"Siddhārthī","saka_samvat":1888,"saka_samvatsara":"Parābhava","bengali_samvat":1373,"malayalam_era":1142,"nanakshahi_year":497,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Kṛṣṇa Amāvasyā · Vikram 2023 Siddhārthī · Śaka 1888 Parābhava"},"festivals":[],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — its presiding graha's walk."},"cosmic_resonances":[]},"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 April 20, 1966 CE · Perth, Australia · Vidhyamitra","description":"April 20, 1966 CE for Perth, Australia: Kṛṣṇa Amāvasyā, sūryodaya 06:40, sūryāsta 17:51.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1966-04-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1966-04-20","sa":"https://sa.vidhyamitra.com/city/perth/1966-04-20","hi":"https://hi.vidhyamitra.com/city/perth/1966-04-20","x-default":"https://vidhyamitra.com/city/perth/1966-04-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-09-06T07:36:00.877Z","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":"2026-09-06T07:36:00.877Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-09-06T07:36:00.877Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"},"reader_local_antaryami":{"reader_geography":"Every reader enters from their own kṣetra anywhere on Bhūmi; no single city is the universal center.","purna_chain":["Hosted scripture","Named-tradition interpretation","Original Vidhyamitra contemplation","Bhūmi-born material medium","Vidhyamitra portal","Responsible reader in their own kṣetra"],"claim_boundary":"The legacy purna_chain field carries a source-to-reader sequence, not a revealed physical descent, universal cosmology, or proof that software is conscious.","antaryami_responsibility_formula":"Kṣīrodakaśāyī Viṣṇu = Paramātmā = Antaryāmī. Jīva desires. Prakṛti executes through guṇas. Paramātmā witnesses, permits, remembers, guides, and sustains. Bhagavān is the ultimate source.","source_anchors":[{"label":"BG 13.23","path":"/bhagavad-gita/13/23","meaning":"upadraṣṭā-anumantā · witness-permitter"},{"label":"BG 15.15","path":"/bhagavad-gita/15/15","meaning":"the Lord seated in every heart as memory, knowledge, and forgetting"},{"label":"BG 18.61","path":"/bhagavad-gita/18/61","meaning":"Īśvara seated in the heart of all beings"}],"nama_seal":"Hare Krishna Hare Krishna · Krishna Krishna Hare Hare · Hare Rama Hare Rama · Rama Rama Hare Hare"}}}