{"id":"vidhyamitra:city-day:perth:2020-12-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2020-12-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2020-12-04","date_display":"December 4, 2020 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":2020,"month":12,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2459187.770833,"kali_year":5122,"ahargana":1870722.2708,"sun":{"sidereal_longitude":227.6754,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":91.2477,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":223.5723,"elapsed_within_tithi_degrees":7.5723},"nakshatra":{"number":7,"name":"Punarvasu","pada":4,"moon_longitude":91.2477,"elapsed_within_degrees":11.2477},"yoga":{"number":24,"name":"Śukla","sum_longitude":318.9231},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":2020,"month":12,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2459187.770833,"ahargana":1870722.2708,"kali_year":5122,"ayanamsa_lahiri":24.1453,"grahas":{"sun":{"sidereal_longitude":228.20159999999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":89.53790000000004,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false,"latitude":2.3237},"mars":{"sidereal_longitude":353.2686,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":218.95039999999995,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":272.6069,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":201.06470000000002,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":274.5386000000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":60.1315,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":240.1315,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"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":2020,"month":12,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2459187.770833,"kali_year":5122,"ahargana":1870722.2708,"sun":{"sidereal_longitude":227.6754,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":91.2477,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":223.5723,"elapsed_within_tithi_degrees":7.5723},"nakshatra":{"number":7,"name":"Punarvasu","pada":4,"moon_longitude":91.2477,"elapsed_within_degrees":11.2477},"yoga":{"number":24,"name":"Śukla","sum_longitude":318.9231},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.324,"elongation":136.428},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.324,"opposition_distance":43.572}},"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":"05:04","sunsetLocal":"19:11","solarNoonLocal":"12:08","dayLengthHours":14.119876727380294,"dayLengthDisplay":"14 Hours 07 Mins 12 Secs","nightLengthDisplay":"9 Hours 52 Mins 48 Secs","moonriseLocal":"21:46","moonsetLocal":"08:00","rahuKala":{"name":"Rāhu Kāla","start":"10:22","end":"12:08","startHours":10.361635000175742,"endHours":12.12661959109828,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:39","end":"17:25","startHours":15.656588772943351,"endHours":17.42157336386589,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:50","end":"08:36","startHours":6.831665818330668,"endHours":8.596650409253204,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:22","end":"08:50","startHours":8.361319130463533,"endHours":8.831981688042877,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:39","end":"06:02","startHours":5.65500942438231,"endHours":6.031539470445785,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:39","end":"12:36","startHours":11.655957033518936,"endHours":12.597282148677623,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:11","end":"04:08","startHours":3.1840309970907588,"endHours":4.125356112249445,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:53","end":"05:04","startHours":3.8900248334597736,"endHours":5.066681227408131,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:29","end":"15:25","startHours":14.479932378994995,"endHours":15.421257494153682,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:59","end":"19:23","startHours":18.986557954788427,"endHours":19.386557954788426,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:11","end":"19:46","startHours":19.186557954788427,"endHours":19.774886151762605,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:56","end":"20:41","startHours":18.936557954788427,"endHours":20.686557954788427,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:39","end":"00:36","startHours":23.655957033518938,"endHours":24.59728214867762,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"05:04","end":"06:50","startHours":5.066681227408131,"endHours":6.831665818330668,"quality":"neutral"},{"name":"Labha","start":"06:50","end":"08:36","startHours":6.831665818330668,"endHours":8.596650409253204,"quality":"auspicious"},{"name":"Amṛta","start":"08:36","end":"10:22","startHours":8.596650409253204,"endHours":10.361635000175742,"quality":"auspicious"},{"name":"Kāla","start":"10:22","end":"12:08","startHours":10.361635000175742,"endHours":12.12661959109828,"quality":"inauspicious"},{"name":"Śubha","start":"12:08","end":"13:53","startHours":12.12661959109828,"endHours":13.891604182020817,"quality":"auspicious"},{"name":"Roga","start":"13:53","end":"15:39","startHours":13.891604182020817,"endHours":15.656588772943351,"quality":"inauspicious"},{"name":"Udveg","start":"15:39","end":"17:25","startHours":15.656588772943351,"endHours":17.42157336386589,"quality":"inauspicious"},{"name":"Chala","start":"17:25","end":"19:11","startHours":17.42157336386589,"endHours":19.186557954788427,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"19:11","end":"20:25","startHours":19.186557954788427,"endHours":20.42157336386589,"quality":"inauspicious"},{"name":"Udveg","start":"20:25","end":"21:39","startHours":20.42157336386589,"endHours":21.65658877294335,"quality":"inauspicious"},{"name":"Chala","start":"21:39","end":"22:53","startHours":21.65658877294335,"endHours":22.891604182020817,"quality":"neutral"},{"name":"Labha","start":"22:53","end":"00:08","startHours":22.891604182020817,"endHours":24.12661959109828,"quality":"auspicious"},{"name":"Amṛta","start":"00:08","end":"01:22","startHours":24.12661959109828,"endHours":25.361635000175742,"quality":"auspicious"},{"name":"Kāla","start":"01:22","end":"02:36","startHours":25.361635000175742,"endHours":26.596650409253208,"quality":"inauspicious"},{"name":"Śubha","start":"02:36","end":"03:50","startHours":26.596650409253208,"endHours":27.83166581833067,"quality":"auspicious"},{"name":"Roga","start":"03:50","end":"05:04","startHours":27.83166581833067,"endHours":29.066681227408132,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:04","end":"06:04","startHours":5.066681227408131,"endHours":6.066681227408131,"planetary_lord":"Venus"},{"name":"Hora 2","start":"06:04","end":"07:04","startHours":6.066681227408131,"endHours":7.066681227408131,"planetary_lord":"Sun"},{"name":"Hora 3","start":"07:04","end":"08:04","startHours":7.066681227408131,"endHours":8.066681227408132,"planetary_lord":"Mars"},{"name":"Hora 4","start":"08:04","end":"09:04","startHours":8.066681227408132,"endHours":9.066681227408132,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"09:04","end":"10:04","startHours":9.066681227408132,"endHours":10.066681227408132,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"10:04","end":"11:04","startHours":10.066681227408132,"endHours":11.066681227408132,"planetary_lord":"Moon"},{"name":"Hora 7","start":"11:04","end":"12:04","startHours":11.066681227408132,"endHours":12.066681227408132,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"12:04","end":"13:04","startHours":12.066681227408132,"endHours":13.066681227408132,"planetary_lord":"Venus"},{"name":"Hora 9","start":"13:04","end":"14:04","startHours":13.066681227408132,"endHours":14.066681227408132,"planetary_lord":"Sun"},{"name":"Hora 10","start":"14:04","end":"15:04","startHours":14.066681227408132,"endHours":15.066681227408132,"planetary_lord":"Mars"},{"name":"Hora 11","start":"15:04","end":"16:04","startHours":15.066681227408132,"endHours":16.066681227408132,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"16:04","end":"17:04","startHours":16.066681227408132,"endHours":17.066681227408132,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"17:04","end":"18:04","startHours":17.066681227408132,"endHours":18.066681227408132,"planetary_lord":"Moon"},{"name":"Hora 14","start":"18:04","end":"19:04","startHours":18.066681227408132,"endHours":19.066681227408132,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"19:04","end":"20:04","startHours":19.066681227408132,"endHours":20.066681227408132,"planetary_lord":"Venus"},{"name":"Hora 16","start":"20:04","end":"21:04","startHours":20.066681227408132,"endHours":21.066681227408132,"planetary_lord":"Sun"},{"name":"Hora 17","start":"21:04","end":"22:04","startHours":21.066681227408132,"endHours":22.066681227408132,"planetary_lord":"Mars"},{"name":"Hora 18","start":"22:04","end":"23:04","startHours":22.066681227408132,"endHours":23.066681227408132,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"23:04","end":"00:04","startHours":23.066681227408132,"endHours":24.066681227408132,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"00:04","end":"01:04","startHours":24.066681227408132,"endHours":25.066681227408132,"planetary_lord":"Moon"},{"name":"Hora 21","start":"01:04","end":"02:04","startHours":25.066681227408132,"endHours":26.066681227408132,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"02:04","end":"03:04","startHours":26.066681227408132,"endHours":27.066681227408132,"planetary_lord":"Venus"},{"name":"Hora 23","start":"03:04","end":"04:04","startHours":27.066681227408132,"endHours":28.066681227408132,"planetary_lord":"Sun"},{"name":"Hora 24","start":"04:04","end":"05:04","startHours":28.066681227408132,"endHours":29.066681227408132,"planetary_lord":"Mars"}],"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","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"South-East","anandadiYoga":{"name":"Sushira","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Śarad (Autumn)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-22.27195545244678,"eotMinutes":8.960824534103129,"ayanamsa":24.1453}},"calendars":{"vikram_samvat":2077,"vikram_samvatsara":"Pramādī","saka_samvat":1942,"saka_samvatsara":"Śārvarī","bengali_samvat":1427,"malayalam_era":1196,"nanakshahi_year":551,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Kṛṣṇa Pakṣa","solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Kṛṣṇa Caturthī · Vikram 2077 Pramādī · Śaka 1942 Śārvarī"},"festivals":[{"id":"vrischika-sankranti","name":"Vṛścika Saṅkrānti","name_sanskrit":"वृश्चिक सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Scorpio.","vrata":false,"detection":{"sun_rashi":"Vṛścika"},"precedence":5},{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Punarvasu","url":"/day/-1626101-04-03","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 December 4, 2020 CE · Perth, Australia · Vidhyamitra","description":"December 4, 2020 CE for Perth, Australia: Kṛṣṇa Caturthī, sūryodaya 05:04, sūryāsta 19:11.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2020-12-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2020-12-04","sa":"https://sa.vidhyamitra.com/city/perth/2020-12-04","hi":"https://hi.vidhyamitra.com/city/perth/2020-12-04","x-default":"https://vidhyamitra.com/city/perth/2020-12-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T22:44:04.791Z","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":"2026-05-14T22:44:04.791Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T22:44:04.791Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}