{"id":"vidhyamitra:city-day:perth:1979-10-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1979-10-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1979-10-31","date_display":"October 31, 1979 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":1979,"month":10,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444177.770833,"kali_year":5081,"ahargana":1855712.2708,"sun":{"sidereal_longitude":192.8067,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":318.1821,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":125.3754,"elapsed_within_tithi_degrees":5.3754},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4,"moon_longitude":318.1821,"elapsed_within_degrees":11.5154},"yoga":{"number":12,"name":"Dhruva","sum_longitude":150.9887},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"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":1979,"month":10,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444177.770833,"ahargana":1855712.2708,"kali_year":5081,"ayanamsa_lahiri":23.5712,"grahas":{"sun":{"sidereal_longitude":193.447093,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":316.33399299999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false,"latitude":-0.2156},"mars":{"sidereal_longitude":117.05049300000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":217.61819300000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":131.763693,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":211.19129299999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":149.41249299999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":135.4336,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":315.4336,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"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":1979,"month":10,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444177.770833,"kali_year":5081,"ahargana":1855712.2708,"sun":{"sidereal_longitude":192.8067,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":318.1821,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":125.3754,"elapsed_within_tithi_degrees":5.3754},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4,"moon_longitude":318.1821,"elapsed_within_degrees":11.5154},"yoga":{"number":12,"name":"Dhruva","sum_longitude":150.9887},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.216,"elongation":125.375},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.216,"opposition_distance":54.625}},"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":"05:21","sunsetLocal":"18:40","solarNoonLocal":"12:00","dayLengthHours":13.316424017325243,"dayLengthDisplay":"13 Hours 18 Mins 59 Secs","nightLengthDisplay":"10 Hours 41 Mins 01 Secs","moonriseLocal":"13:49","moonsetLocal":"02:34","rahuKala":{"name":"Rāhu Kāla","start":"12:00","end":"13:40","startHours":12.001753674157863,"endHours":13.666306676323519,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:00","end":"08:40","startHours":7.008094667660897,"endHours":8.672647669826553,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:20","end":"12:00","startHours":10.337200671992207,"endHours":12.001753674157863,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:27","end":"08:54","startHours":8.450707269537798,"endHours":8.894588070115306,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:54","end":"06:15","startHours":5.898392666217126,"endHours":6.253497306679133,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:33","end":"12:27","startHours":11.557872873580354,"endHours":12.445634474735371,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:34","end":"04:27","startHours":3.5680184631852088,"endHours":4.4557800643402246,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:14","end":"05:21","startHours":4.233839664051471,"endHours":5.343541665495241,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:13","end":"15:07","startHours":14.221157677045404,"endHours":15.108919278200421,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:28","end":"18:52","startHours":18.459965682820485,"endHours":18.859965682820484,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:40","end":"19:13","startHours":18.659965682820484,"endHours":19.21481668354237,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:25","end":"20:10","startHours":18.409965682820484,"endHours":20.159965682820484,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:33","end":"00:27","startHours":23.557872873580354,"endHours":24.445634474735368,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:21","end":"07:00","startHours":5.343541665495241,"endHours":7.008094667660897,"quality":"auspicious"},{"name":"Amṛta","start":"07:00","end":"08:40","startHours":7.008094667660897,"endHours":8.672647669826553,"quality":"auspicious"},{"name":"Kāla","start":"08:40","end":"10:20","startHours":8.672647669826553,"endHours":10.337200671992207,"quality":"inauspicious"},{"name":"Śubha","start":"10:20","end":"12:00","startHours":10.337200671992207,"endHours":12.001753674157863,"quality":"auspicious"},{"name":"Roga","start":"12:00","end":"13:40","startHours":12.001753674157863,"endHours":13.666306676323519,"quality":"inauspicious"},{"name":"Udveg","start":"13:40","end":"15:20","startHours":13.666306676323519,"endHours":15.330859678489173,"quality":"inauspicious"},{"name":"Chala","start":"15:20","end":"17:00","startHours":15.330859678489173,"endHours":16.99541268065483,"quality":"neutral"},{"name":"Labha","start":"17:00","end":"18:40","startHours":16.99541268065483,"endHours":18.659965682820484,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:40","end":"20:00","startHours":18.659965682820484,"endHours":19.99541268065483,"quality":"inauspicious"},{"name":"Chala","start":"20:00","end":"21:20","startHours":19.99541268065483,"endHours":21.330859678489173,"quality":"neutral"},{"name":"Labha","start":"21:20","end":"22:40","startHours":21.330859678489173,"endHours":22.66630667632352,"quality":"auspicious"},{"name":"Amṛta","start":"22:40","end":"00:00","startHours":22.66630667632352,"endHours":24.00175367415786,"quality":"auspicious"},{"name":"Kāla","start":"00:00","end":"01:20","startHours":24.00175367415786,"endHours":25.337200671992207,"quality":"inauspicious"},{"name":"Śubha","start":"01:20","end":"02:40","startHours":25.337200671992207,"endHours":26.672647669826553,"quality":"auspicious"},{"name":"Roga","start":"02:40","end":"04:00","startHours":26.672647669826553,"endHours":28.0080946676609,"quality":"inauspicious"},{"name":"Udveg","start":"04:00","end":"05:21","startHours":28.0080946676609,"endHours":29.34354166549524,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:21","end":"06:21","startHours":5.343541665495241,"endHours":6.343541665495241,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:21","end":"07:21","startHours":6.343541665495241,"endHours":7.343541665495241,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:21","end":"08:21","startHours":7.343541665495241,"endHours":8.343541665495241,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:21","end":"09:21","startHours":8.343541665495241,"endHours":9.343541665495241,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:21","end":"10:21","startHours":9.343541665495241,"endHours":10.343541665495241,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:21","end":"11:21","startHours":10.343541665495241,"endHours":11.343541665495241,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:21","end":"12:21","startHours":11.343541665495241,"endHours":12.343541665495241,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:21","end":"13:21","startHours":12.343541665495241,"endHours":13.343541665495241,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:21","end":"14:21","startHours":13.343541665495241,"endHours":14.343541665495241,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:21","end":"15:21","startHours":14.343541665495241,"endHours":15.343541665495241,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:21","end":"16:21","startHours":15.343541665495241,"endHours":16.34354166549524,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:21","end":"17:21","startHours":16.34354166549524,"endHours":17.34354166549524,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:21","end":"18:21","startHours":17.34354166549524,"endHours":18.34354166549524,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:21","end":"19:21","startHours":18.34354166549524,"endHours":19.34354166549524,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:21","end":"20:21","startHours":19.34354166549524,"endHours":20.34354166549524,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:21","end":"21:21","startHours":20.34354166549524,"endHours":21.34354166549524,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:21","end":"22:21","startHours":21.34354166549524,"endHours":22.34354166549524,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:21","end":"23:21","startHours":22.34354166549524,"endHours":23.34354166549524,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:21","end":"00:21","startHours":23.34354166549524,"endHours":24.34354166549524,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:21","end":"01:21","startHours":24.34354166549524,"endHours":25.34354166549524,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:21","end":"02:21","startHours":25.34354166549524,"endHours":26.34354166549524,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:21","end":"03:21","startHours":26.34354166549524,"endHours":27.34354166549524,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:21","end":"04:21","startHours":27.34354166549524,"endHours":28.34354166549524,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:21","end":"05:21","startHours":28.34354166549524,"endHours":29.34354166549524,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"South","rahuVasa":"South-West","anandadiYoga":{"name":"Śrīvatsa","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-13.854834973615006,"eotMinutes":16.45277955052819,"ayanamsa":23.5712}},"calendars":{"vikram_samvat":2036,"vikram_samvatsara":"Aṅgirasa","saka_samvat":1901,"saka_samvatsara":"Siddhārthī","bengali_samvat":1386,"malayalam_era":1155,"nanakshahi_year":510,"lunar_month":"Kārtika","lunar_month_paksha_full":"Kārtika Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Kārtika","lunar_month_amanta":"Kārtika","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Kārtika Śukla Ekādaśī · Vikram 2036 Aṅgirasa · Śaka 1901 Siddhārthī"},"festivals":[{"id":"devotthana-ekadashi","name":"Devotthāna Ekādaśī (Prabodhinī)","name_sanskrit":"देवोत्थान एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Bhagavān Viṣṇu awakens; Cāturmāsya ends; weddings can resume.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Kārtika"},"precedence":3},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5}],"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 October 31, 1979 CE · Perth, Australia · Vidhyamitra","description":"October 31, 1979 CE for Perth, Australia: Śukla Ekādaśī, sūryodaya 05:21, sūryāsta 18:40.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1979-10-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1979-10-31","sa":"https://sa.vidhyamitra.com/city/perth/1979-10-31","hi":"https://hi.vidhyamitra.com/city/perth/1979-10-31","x-default":"https://vidhyamitra.com/city/perth/1979-10-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T17:23:09.601Z","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":"2026-06-02T17:23:09.601Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T17:23:09.601Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}