{"id":"vidhyamitra:city-day:perth:1920-02-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1920-02-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1920-02-18","date_display":"February 18, 1920 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":1920,"month":2,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2422372.770833,"kali_year":5021,"ahargana":1833907.2708,"sun":{"sidereal_longitude":305.6536,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":282.616,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":336.9624,"elapsed_within_tithi_degrees":0.9624},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":282.616,"elapsed_within_degrees":2.616},"yoga":{"number":18,"name":"Varīyān","sum_longitude":228.2697},"karana":{"half_tithi_index":56,"name":"Viṣṭi"},"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":1920,"month":2,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2422372.770833,"ahargana":1833907.2708,"kali_year":5021,"ayanamsa_lahiri":22.7373,"grahas":{"sun":{"sidereal_longitude":305.35520399999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":283.373104,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false,"latitude":4.2756},"mars":{"sidereal_longitude":193.75820399999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":316.184304,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":108.85680400000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":272.12800400000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":136.816804,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":210.7674,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":30.7674,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","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":1920,"month":2,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2422372.770833,"kali_year":5021,"ahargana":1833907.2708,"sun":{"sidereal_longitude":305.6536,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":282.616,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":336.9624,"elapsed_within_tithi_degrees":0.9624},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":282.616,"elapsed_within_degrees":2.616},"yoga":{"number":18,"name":"Varīyān","sum_longitude":228.2697},"karana":{"half_tithi_index":56,"name":"Viṣṭi"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.276,"elongation":23.038},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.276,"opposition_distance":156.962}},"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":"05:56","sunsetLocal":"19:06","solarNoonLocal":"12:31","dayLengthHours":13.162857331271454,"dayLengthDisplay":"13 Hours 09 Mins 46 Secs","nightLengthDisplay":"10 Hours 50 Mins 14 Secs","moonriseLocal":"04:11","moonsetLocal":"17:55","rahuKala":{"name":"Rāhu Kāla","start":"12:31","end":"14:10","startHours":12.516547936873337,"endHours":14.161905103282269,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:35","end":"09:14","startHours":7.580476437646541,"endHours":9.225833604055474,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:52","end":"12:31","startHours":10.871190770464406,"endHours":12.516547936873337,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:00","end":"09:27","startHours":9.006452648534282,"endHours":9.445214559576664,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:29","end":"06:50","startHours":6.483571660040587,"endHours":6.834581188874493,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:05","end":"12:57","startHours":12.077786025830955,"endHours":12.95530984791572,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:11","end":"05:03","startHours":4.180071627068083,"endHours":5.057595449152846,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:50","end":"05:56","startHours":4.838214493631655,"endHours":5.9351192712376095,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:43","end":"15:35","startHours":14.710357492085244,"endHours":15.587881314170007,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:54","end":"19:18","startHours":18.897976602509065,"endHours":19.297976602509063,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:06","end":"19:39","startHours":19.097976602509064,"endHours":19.646428991312042,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:51","end":"20:36","startHours":18.847976602509064,"endHours":20.597976602509064,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:05","end":"00:57","startHours":24.077786025830957,"endHours":24.955309847915718,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:56","end":"07:35","startHours":5.9351192712376095,"endHours":7.580476437646541,"quality":"auspicious"},{"name":"Amṛta","start":"07:35","end":"09:14","startHours":7.580476437646541,"endHours":9.225833604055474,"quality":"auspicious"},{"name":"Kāla","start":"09:14","end":"10:52","startHours":9.225833604055474,"endHours":10.871190770464406,"quality":"inauspicious"},{"name":"Śubha","start":"10:52","end":"12:31","startHours":10.871190770464406,"endHours":12.516547936873337,"quality":"auspicious"},{"name":"Roga","start":"12:31","end":"14:10","startHours":12.516547936873337,"endHours":14.161905103282269,"quality":"inauspicious"},{"name":"Udveg","start":"14:10","end":"15:48","startHours":14.161905103282269,"endHours":15.8072622696912,"quality":"inauspicious"},{"name":"Chala","start":"15:48","end":"17:27","startHours":15.8072622696912,"endHours":17.452619436100132,"quality":"neutral"},{"name":"Labha","start":"17:27","end":"19:06","startHours":17.452619436100132,"endHours":19.097976602509064,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"19:06","end":"20:27","startHours":19.097976602509064,"endHours":20.452619436100132,"quality":"inauspicious"},{"name":"Chala","start":"20:27","end":"21:48","startHours":20.452619436100132,"endHours":21.8072622696912,"quality":"neutral"},{"name":"Labha","start":"21:48","end":"23:10","startHours":21.8072622696912,"endHours":23.16190510328227,"quality":"auspicious"},{"name":"Amṛta","start":"23:10","end":"00:31","startHours":23.16190510328227,"endHours":24.516547936873337,"quality":"auspicious"},{"name":"Kāla","start":"00:31","end":"01:52","startHours":24.516547936873337,"endHours":25.871190770464406,"quality":"inauspicious"},{"name":"Śubha","start":"01:52","end":"03:14","startHours":25.871190770464406,"endHours":27.225833604055474,"quality":"auspicious"},{"name":"Roga","start":"03:14","end":"04:35","startHours":27.225833604055474,"endHours":28.580476437646542,"quality":"inauspicious"},{"name":"Udveg","start":"04:35","end":"05:56","startHours":28.580476437646542,"endHours":29.93511927123761,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:56","end":"06:56","startHours":5.9351192712376095,"endHours":6.9351192712376095,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:56","end":"07:56","startHours":6.9351192712376095,"endHours":7.9351192712376095,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:56","end":"08:56","startHours":7.9351192712376095,"endHours":8.93511927123761,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:56","end":"09:56","startHours":8.93511927123761,"endHours":9.93511927123761,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:56","end":"10:56","startHours":9.93511927123761,"endHours":10.93511927123761,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:56","end":"11:56","startHours":10.93511927123761,"endHours":11.93511927123761,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:56","end":"12:56","startHours":11.93511927123761,"endHours":12.93511927123761,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:56","end":"13:56","startHours":12.93511927123761,"endHours":13.93511927123761,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:56","end":"14:56","startHours":13.93511927123761,"endHours":14.93511927123761,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:56","end":"15:56","startHours":14.93511927123761,"endHours":15.93511927123761,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:56","end":"16:56","startHours":15.93511927123761,"endHours":16.93511927123761,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:56","end":"17:56","startHours":16.93511927123761,"endHours":17.93511927123761,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:56","end":"18:56","startHours":17.93511927123761,"endHours":18.93511927123761,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:56","end":"19:56","startHours":18.93511927123761,"endHours":19.93511927123761,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:56","end":"20:56","startHours":19.93511927123761,"endHours":20.93511927123761,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:56","end":"21:56","startHours":20.93511927123761,"endHours":21.93511927123761,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:56","end":"22:56","startHours":21.93511927123761,"endHours":22.93511927123761,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:56","end":"23:56","startHours":22.93511927123761,"endHours":23.93511927123761,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:56","end":"00:56","startHours":23.93511927123761,"endHours":24.93511927123761,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:56","end":"01:56","startHours":24.93511927123761,"endHours":25.93511927123761,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:56","end":"02:56","startHours":25.93511927123761,"endHours":26.93511927123761,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:56","end":"03:56","startHours":26.93511927123761,"endHours":27.93511927123761,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:56","end":"04:56","startHours":27.93511927123761,"endHours":28.93511927123761,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:56","end":"05:56","startHours":28.93511927123761,"endHours":29.93511927123761,"planetary_lord":"Sun"}],"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":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-East","rahuVasa":"South-West","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"tropicalRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-12.135318613091332,"eotMinutes":-14.434876212400278,"ayanamsa":22.7373}},"calendars":{"vikram_samvat":1977,"vikram_samvatsara":"Śrīmukha","saka_samvat":1842,"saka_samvatsara":"Raudra","bengali_samvat":1327,"malayalam_era":1096,"nanakshahi_year":451,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Caturdaśī · Vikram 1977 Śrīmukha · Śaka 1842 Raudra"},"festivals":[{"id":"maha-shivaratri","name":"Mahā Śivarātri","name_sanskrit":"महा शिवरात्रि","tradition":"Shaiva","associated_deity":"Śiva","significance":"The greatest night of Lord Śiva; cosmic dance of dissolution.","vrata":true,"primary_observance":"Strict fast + night-long vigil + 4-yāma pūjā","detection":{"tithi_number":29,"tithi_paksha":"Kṛṣṇa","lunar_month":"Phālguna"},"precedence":1},{"id":"masika-shivaratri","name":"Māsika Śivarātri","name_sanskrit":"मासिक शिवरात्रि","tradition":"Shaiva","associated_deity":"Śiva","significance":"Monthly Śiva observance.","vrata":true,"detection":{"tithi_number":29,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"maha-shivaratri-walk","name":"Mahā Śivarātri Walk","name_sanskrit":"महा शिवरात्रि यात्रा","type":"festival","description":"Śiva-stuti through Bhāgavata + Mahābhārata Anuśāsana.","step_count":12,"url":"/walk/maha-shivaratri-walk"},"reason":"Today is Mahā Śivarātri — its dedicated 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 February 18, 1920 CE · Perth, Australia · Vidhyamitra","description":"February 18, 1920 CE for Perth, Australia: Kṛṣṇa Caturdaśī, sūryodaya 05:56, sūryāsta 19:06.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1920-02-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1920-02-18","sa":"https://sa.vidhyamitra.com/city/perth/1920-02-18","hi":"https://hi.vidhyamitra.com/city/perth/1920-02-18","x-default":"https://vidhyamitra.com/city/perth/1920-02-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T11:02:27.415Z","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":"2026-06-01T11:02:27.415Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T11:02:27.415Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}