{"id":"vidhyamitra:city-day:perth:1917-12-07:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1917-12-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1917-12-07","date_display":"December 7, 1917 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":1917,"month":12,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2421569.770833,"kali_year":5019,"ahargana":1833104.2708,"sun":{"sidereal_longitude":231.4119,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":146.9276,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":275.5158,"elapsed_within_tithi_degrees":11.5158},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1,"moon_longitude":146.9276,"elapsed_within_degrees":0.261},"yoga":{"number":2,"name":"Prīti","sum_longitude":18.3395},"karana":{"half_tithi_index":45,"name":"Kaulava"},"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":1917,"month":12,"day":7,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2421569.770833,"ahargana":1833104.2708,"kali_year":5019,"ayanamsa_lahiri":22.7066,"grahas":{"sun":{"sidereal_longitude":231.664584,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":146.50888400000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false,"latitude":-4.3169},"mars":{"sidereal_longitude":145.756884,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":250.472084,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":43.13198399999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":true},"venus":{"sidereal_longitude":279.91658400000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":112.28148399999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":253.3142,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":73.3142,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","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":1917,"month":12,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2421569.770833,"kali_year":5019,"ahargana":1833104.2708,"sun":{"sidereal_longitude":231.4119,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":146.9276,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":275.5158,"elapsed_within_tithi_degrees":11.5158},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1,"moon_longitude":146.9276,"elapsed_within_degrees":0.261},"yoga":{"number":2,"name":"Prīti","sum_longitude":18.3395},"karana":{"half_tithi_index":45,"name":"Kaulava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.317,"elongation":84.484},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.317,"opposition_distance":95.516}},"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":"19:13","solarNoonLocal":"12:09","dayLengthHours":14.145375473899502,"dayLengthDisplay":"14 Hours 08 Mins 43 Secs","nightLengthDisplay":"9 Hours 51 Mins 17 Secs","moonriseLocal":"00:36","moonsetLocal":"12:20","rahuKala":{"name":"Rāhu Kāla","start":"10:23","end":"12:09","startHours":10.379066457040274,"endHours":12.147238391277714,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:41","end":"17:27","startHours":15.683582259752587,"endHours":17.451754193990027,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:51","end":"08:37","startHours":6.842722588565399,"endHours":8.610894522802838,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:23","end":"08:51","startHours":8.375138264904512,"endHours":8.846650780701163,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:40","end":"06:02","startHours":5.663941299073775,"endHours":6.041151311711095,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:41","end":"12:37","startHours":11.675725875481062,"endHours":12.618750907074363,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:11","end":"04:08","startHours":3.1885005911413615,"endHours":4.131525622734662,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:54","end":"05:04","startHours":3.8957693648363367,"endHours":5.074550654327962,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:30","end":"15:27","startHours":14.504800970260963,"endHours":15.447826001854263,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:01","end":"19:25","startHours":19.019926128227464,"endHours":19.419926128227463,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:13","end":"19:49","startHours":19.219926128227463,"endHours":19.809316772973276,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:58","end":"20:43","startHours":18.969926128227463,"endHours":20.719926128227463,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:41","end":"00:37","startHours":23.67572587548106,"endHours":24.61875090707436,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"05:04","end":"06:51","startHours":5.074550654327962,"endHours":6.842722588565399,"quality":"neutral"},{"name":"Labha","start":"06:51","end":"08:37","startHours":6.842722588565399,"endHours":8.610894522802838,"quality":"auspicious"},{"name":"Amṛta","start":"08:37","end":"10:23","startHours":8.610894522802838,"endHours":10.379066457040274,"quality":"auspicious"},{"name":"Kāla","start":"10:23","end":"12:09","startHours":10.379066457040274,"endHours":12.147238391277714,"quality":"inauspicious"},{"name":"Śubha","start":"12:09","end":"13:55","startHours":12.147238391277714,"endHours":13.91541032551515,"quality":"auspicious"},{"name":"Roga","start":"13:55","end":"15:41","startHours":13.91541032551515,"endHours":15.683582259752587,"quality":"inauspicious"},{"name":"Udveg","start":"15:41","end":"17:27","startHours":15.683582259752587,"endHours":17.451754193990027,"quality":"inauspicious"},{"name":"Chala","start":"17:27","end":"19:13","startHours":17.451754193990027,"endHours":19.219926128227463,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"19:13","end":"20:27","startHours":19.219926128227463,"endHours":20.451754193990027,"quality":"inauspicious"},{"name":"Udveg","start":"20:27","end":"21:41","startHours":20.451754193990027,"endHours":21.683582259752587,"quality":"inauspicious"},{"name":"Chala","start":"21:41","end":"22:55","startHours":21.683582259752587,"endHours":22.91541032551515,"quality":"neutral"},{"name":"Labha","start":"22:55","end":"00:09","startHours":22.91541032551515,"endHours":24.14723839127771,"quality":"auspicious"},{"name":"Amṛta","start":"00:09","end":"01:23","startHours":24.14723839127771,"endHours":25.379066457040274,"quality":"auspicious"},{"name":"Kāla","start":"01:23","end":"02:37","startHours":25.379066457040274,"endHours":26.610894522802838,"quality":"inauspicious"},{"name":"Śubha","start":"02:37","end":"03:51","startHours":26.610894522802838,"endHours":27.8427225885654,"quality":"auspicious"},{"name":"Roga","start":"03:51","end":"05:04","startHours":27.8427225885654,"endHours":29.07455065432796,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:04","end":"06:04","startHours":5.074550654327962,"endHours":6.074550654327962,"planetary_lord":"Venus"},{"name":"Hora 2","start":"06:04","end":"07:04","startHours":6.074550654327962,"endHours":7.074550654327962,"planetary_lord":"Sun"},{"name":"Hora 3","start":"07:04","end":"08:04","startHours":7.074550654327962,"endHours":8.074550654327961,"planetary_lord":"Mars"},{"name":"Hora 4","start":"08:04","end":"09:04","startHours":8.074550654327961,"endHours":9.074550654327961,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"09:04","end":"10:04","startHours":9.074550654327961,"endHours":10.074550654327961,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"10:04","end":"11:04","startHours":10.074550654327961,"endHours":11.074550654327961,"planetary_lord":"Moon"},{"name":"Hora 7","start":"11:04","end":"12:04","startHours":11.074550654327961,"endHours":12.074550654327961,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"12:04","end":"13:04","startHours":12.074550654327961,"endHours":13.074550654327961,"planetary_lord":"Venus"},{"name":"Hora 9","start":"13:04","end":"14:04","startHours":13.074550654327961,"endHours":14.074550654327961,"planetary_lord":"Sun"},{"name":"Hora 10","start":"14:04","end":"15:04","startHours":14.074550654327961,"endHours":15.074550654327961,"planetary_lord":"Mars"},{"name":"Hora 11","start":"15:04","end":"16:04","startHours":15.074550654327961,"endHours":16.07455065432796,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"16:04","end":"17:04","startHours":16.07455065432796,"endHours":17.07455065432796,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"17:04","end":"18:04","startHours":17.07455065432796,"endHours":18.07455065432796,"planetary_lord":"Moon"},{"name":"Hora 14","start":"18:04","end":"19:04","startHours":18.07455065432796,"endHours":19.07455065432796,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"19:04","end":"20:04","startHours":19.07455065432796,"endHours":20.07455065432796,"planetary_lord":"Venus"},{"name":"Hora 16","start":"20:04","end":"21:04","startHours":20.07455065432796,"endHours":21.07455065432796,"planetary_lord":"Sun"},{"name":"Hora 17","start":"21:04","end":"22:04","startHours":21.07455065432796,"endHours":22.07455065432796,"planetary_lord":"Mars"},{"name":"Hora 18","start":"22:04","end":"23:04","startHours":22.07455065432796,"endHours":23.07455065432796,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"23:04","end":"00:04","startHours":23.07455065432796,"endHours":24.07455065432796,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"00:04","end":"01:04","startHours":24.07455065432796,"endHours":25.07455065432796,"planetary_lord":"Moon"},{"name":"Hora 21","start":"01:04","end":"02:04","startHours":25.07455065432796,"endHours":26.07455065432796,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"02:04","end":"03:04","startHours":26.07455065432796,"endHours":27.07455065432796,"planetary_lord":"Venus"},{"name":"Hora 23","start":"03:04","end":"04:04","startHours":27.07455065432796,"endHours":28.07455065432796,"planetary_lord":"Sun"},{"name":"Hora 24","start":"04:04","end":"05:04","startHours":28.07455065432796,"endHours":29.07455065432796,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"West","rahuVasa":"South-East","anandadiYoga":{"name":"Prajāpati","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-22.521319475268278,"eotMinutes":7.723696523337262,"ayanamsa":22.7066}},"calendars":{"vikram_samvat":1974,"vikram_samvatsara":"Pramoda","saka_samvat":1839,"saka_samvatsara":"Piṅgala","bengali_samvat":1324,"malayalam_era":1093,"nanakshahi_year":448,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Kārtika","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Kṛṣṇa Aṣṭamī · Vikram 1974 Pramoda · Śaka 1839 Piṅgala"},"festivals":[{"id":"kalabhairava-ashtami","name":"Kālabhairava Aṣṭamī","name_sanskrit":"कालभैरव अष्टमी","tradition":"Shaiva","associated_deity":"Kālabhairava (fierce Śiva)","significance":"Kālabhairava's manifestation; Kāśī-kṣetrapāla.","vrata":true,"detection":{"tithi_number":23,"tithi_paksha":"Kṛṣṇa","lunar_month":"Mārgaśīrṣa"},"precedence":3}],"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":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Kṛṣṇa Aṣṭamī","url":"/day/-3226-07-09","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 7, 1917 CE · Perth, Australia · Vidhyamitra","description":"December 7, 1917 CE for Perth, Australia: Kṛṣṇa Aṣṭamī, sūryodaya 05:04, sūryāsta 19:13.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1917-12-07","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1917-12-07","sa":"https://sa.vidhyamitra.com/city/perth/1917-12-07","hi":"https://hi.vidhyamitra.com/city/perth/1917-12-07","x-default":"https://vidhyamitra.com/city/perth/1917-12-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T23:03:39.494Z","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":"2026-06-02T23:03:39.494Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T23:03:39.494Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}