{"id":"vidhyamitra:city-day:perth:1963-07-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1963-07-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1963-07-18","date_display":"July 18, 1963 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":1963,"month":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2438228.770833,"kali_year":5065,"ahargana":1849763.2708,"sun":{"sidereal_longitude":91.0161,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":55.6239,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":324.6078,"elapsed_within_tithi_degrees":0.6078},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":1,"moon_longitude":55.6239,"elapsed_within_degrees":2.2905},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":146.64},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":1963,"month":7,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2438228.770833,"ahargana":1849763.2708,"kali_year":5065,"ayanamsa_lahiri":23.3437,"grahas":{"sun":{"sidereal_longitude":91.37638800000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false},"moon":{"sidereal_longitude":54.311688000000004,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false,"latitude":-2.5804},"mars":{"sidereal_longitude":151.744188,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":96.72448800000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":356.013188,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"venus":{"sidereal_longitude":80.111088,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":298.97398799999996,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":90.6402,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":270.6402,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":1963,"month":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2438228.770833,"kali_year":5065,"ahargana":1849763.2708,"sun":{"sidereal_longitude":91.0161,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":55.6239,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":324.6078,"elapsed_within_tithi_degrees":0.6078},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":1,"moon_longitude":55.6239,"elapsed_within_degrees":2.2905},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":146.64},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.58,"elongation":35.392},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.58,"opposition_distance":144.608}},"eclipse_window_40days":[{"offset_days":-11,"type":"lunar","occurs":true,"moon_latitude":0.737,"opposition_distance":1.189}]},"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":"07:14","sunsetLocal":"17:31","solarNoonLocal":"12:22","dayLengthHours":10.279852463682303,"dayLengthDisplay":"10 Hours 16 Mins 47 Secs","nightLengthDisplay":"13 Hours 43 Mins 13 Secs","moonriseLocal":"04:52","moonsetLocal":"14:56","rahuKala":{"name":"Rāhu Kāla","start":"13:40","end":"14:57","startHours":13.658546826635437,"endHours":14.943528384595727,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:14","end":"08:31","startHours":7.233639036833998,"endHours":8.518620594794285,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:48","end":"11:05","startHours":9.803602152754575,"endHours":11.088583710714861,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:38","end":"09:58","startHours":9.63227127835987,"endHours":9.974933027149278,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:40","end":"07:56","startHours":7.661966222820761,"endHours":7.936095621852289,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:02","end":"12:43","startHours":12.03090351988574,"endHours":12.716227017464561,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:52","end":"06:33","startHours":5.862992041676358,"endHours":6.548315539255178,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:23","end":"07:14","startHours":6.376984664860473,"endHours":7.233639036833998,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:05","end":"14:46","startHours":14.0868740126222,"endHours":14.77219751020102,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:19","end":"17:43","startHours":17.313491500516303,"endHours":17.7134915005163,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:31","end":"17:57","startHours":17.513491500516302,"endHours":17.941818686503066,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:16","end":"19:01","startHours":17.263491500516302,"endHours":19.013491500516302,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:02","end":"00:43","startHours":24.03090351988574,"endHours":24.71622701746456,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"07:14","end":"08:31","startHours":7.233639036833998,"endHours":8.518620594794285,"quality":"auspicious"},{"name":"Roga","start":"08:31","end":"09:48","startHours":8.518620594794285,"endHours":9.803602152754575,"quality":"inauspicious"},{"name":"Udveg","start":"09:48","end":"11:05","startHours":9.803602152754575,"endHours":11.088583710714861,"quality":"inauspicious"},{"name":"Chala","start":"11:05","end":"12:22","startHours":11.088583710714861,"endHours":12.37356526867515,"quality":"neutral"},{"name":"Labha","start":"12:22","end":"13:40","startHours":12.37356526867515,"endHours":13.658546826635437,"quality":"auspicious"},{"name":"Amṛta","start":"13:40","end":"14:57","startHours":13.658546826635437,"endHours":14.943528384595727,"quality":"auspicious"},{"name":"Kāla","start":"14:57","end":"16:14","startHours":14.943528384595727,"endHours":16.228509942556013,"quality":"inauspicious"},{"name":"Śubha","start":"16:14","end":"17:31","startHours":16.228509942556013,"endHours":17.513491500516302,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:31","end":"19:14","startHours":17.513491500516302,"endHours":19.228509942556016,"quality":"auspicious"},{"name":"Kāla","start":"19:14","end":"20:57","startHours":19.228509942556016,"endHours":20.943528384595727,"quality":"inauspicious"},{"name":"Śubha","start":"20:57","end":"22:40","startHours":20.943528384595727,"endHours":22.658546826635437,"quality":"auspicious"},{"name":"Roga","start":"22:40","end":"00:22","startHours":22.658546826635437,"endHours":24.37356526867515,"quality":"inauspicious"},{"name":"Udveg","start":"00:22","end":"02:05","startHours":24.37356526867515,"endHours":26.088583710714865,"quality":"inauspicious"},{"name":"Chala","start":"02:05","end":"03:48","startHours":26.088583710714865,"endHours":27.803602152754575,"quality":"neutral"},{"name":"Labha","start":"03:48","end":"05:31","startHours":27.803602152754575,"endHours":29.518620594794285,"quality":"auspicious"},{"name":"Amṛta","start":"05:31","end":"07:14","startHours":29.518620594794285,"endHours":31.233639036834,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:14","end":"08:14","startHours":7.233639036833998,"endHours":8.233639036834,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"08:14","end":"09:14","startHours":8.233639036834,"endHours":9.233639036834,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"09:14","end":"10:14","startHours":9.233639036834,"endHours":10.233639036834,"planetary_lord":"Moon"},{"name":"Hora 4","start":"10:14","end":"11:14","startHours":10.233639036834,"endHours":11.233639036834,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"11:14","end":"12:14","startHours":11.233639036834,"endHours":12.233639036834,"planetary_lord":"Venus"},{"name":"Hora 6","start":"12:14","end":"13:14","startHours":12.233639036834,"endHours":13.233639036834,"planetary_lord":"Sun"},{"name":"Hora 7","start":"13:14","end":"14:14","startHours":13.233639036834,"endHours":14.233639036834,"planetary_lord":"Mars"},{"name":"Hora 8","start":"14:14","end":"15:14","startHours":14.233639036834,"endHours":15.233639036834,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"15:14","end":"16:14","startHours":15.233639036834,"endHours":16.233639036834,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"16:14","end":"17:14","startHours":16.233639036834,"endHours":17.233639036834,"planetary_lord":"Moon"},{"name":"Hora 11","start":"17:14","end":"18:14","startHours":17.233639036834,"endHours":18.233639036834,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"18:14","end":"19:14","startHours":18.233639036834,"endHours":19.233639036834,"planetary_lord":"Venus"},{"name":"Hora 13","start":"19:14","end":"20:14","startHours":19.233639036834,"endHours":20.233639036834,"planetary_lord":"Sun"},{"name":"Hora 14","start":"20:14","end":"21:14","startHours":20.233639036834,"endHours":21.233639036834,"planetary_lord":"Mars"},{"name":"Hora 15","start":"21:14","end":"22:14","startHours":21.233639036834,"endHours":22.233639036834,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"22:14","end":"23:14","startHours":22.233639036834,"endHours":23.233639036834,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"23:14","end":"00:14","startHours":23.233639036834,"endHours":24.233639036834,"planetary_lord":"Moon"},{"name":"Hora 18","start":"00:14","end":"01:14","startHours":24.233639036834,"endHours":25.233639036834,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"01:14","end":"02:14","startHours":25.233639036834,"endHours":26.233639036834,"planetary_lord":"Venus"},{"name":"Hora 20","start":"02:14","end":"03:14","startHours":26.233639036834,"endHours":27.233639036834,"planetary_lord":"Sun"},{"name":"Hora 21","start":"03:14","end":"04:14","startHours":27.233639036834,"endHours":28.233639036834,"planetary_lord":"Mars"},{"name":"Hora 22","start":"04:14","end":"05:14","startHours":28.233639036834,"endHours":29.233639036834,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"05:14","end":"06:14","startHours":29.233639036834,"endHours":30.233639036834,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"06:14","end":"07:14","startHours":30.233639036834,"endHours":31.233639036834,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-East","rahuVasa":"North-West","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"drikRitu":"Grīṣma (Summer)","vedicRitu":"Grīṣma (Summer)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":21.179127204935096,"eotMinutes":-5.85591612050904,"ayanamsa":23.3437}},"calendars":{"vikram_samvat":2020,"vikram_samvatsara":"Nala","saka_samvat":1885,"saka_samvatsara":"Śobhana","bengali_samvat":1370,"malayalam_era":1139,"nanakshahi_year":494,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Kṛṣṇa Pakṣa","solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Kṛṣṇa Trayodaśī · Vikram 2020 Nala · Śaka 1885 Śobhana"},"festivals":[{"id":"karka-sankranti","name":"Karka Saṅkrānti (Dakṣiṇāyana)","name_sanskrit":"कर्क सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Cancer; Dakṣiṇāyana (south-going) begins. Devatā-rātri begins.","vrata":true,"detection":{"sun_rashi":"Karka"},"precedence":2},{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — 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 July 18, 1963 CE · Perth, Australia · Vidhyamitra","description":"July 18, 1963 CE for Perth, Australia: Kṛṣṇa Trayodaśī, sūryodaya 07:14, sūryāsta 17:31.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1963-07-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1963-07-18","sa":"https://sa.vidhyamitra.com/city/perth/1963-07-18","hi":"https://hi.vidhyamitra.com/city/perth/1963-07-18","x-default":"https://vidhyamitra.com/city/perth/1963-07-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-22T07:43:45.073Z","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":"2026-05-22T07:43:45.073Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-22T07:43:45.073Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}