{"id":"vidhyamitra:city-day:perth:2118-12-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2118-12-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2118-12-18","date_display":"December 18, 2118 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":2118,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2494994.770833,"kali_year":5220,"ahargana":1906529.2708,"sun":{"sidereal_longitude":239.6017,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":305.8456,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":66.2439,"elapsed_within_tithi_degrees":6.2439},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4,"moon_longitude":305.8456,"elapsed_within_degrees":12.5123},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":185.4473},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":2118,"month":12,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2494994.770833,"ahargana":1906529.2708,"kali_year":5220,"ayanamsa_lahiri":25.5148,"grahas":{"sun":{"sidereal_longitude":240.26231000000007,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":308.92130999999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false,"latitude":-1.3188},"mars":{"sidereal_longitude":84.46880999999996,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":true},"mercury":{"sidereal_longitude":228.97971000000007,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":13.935709999999972,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":true},"venus":{"sidereal_longitude":259.43571,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":33.81160999999997,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":true},"rahu":{"sidereal_longitude":322.9044,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":142.9044,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","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":2118,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2494994.770833,"kali_year":5220,"ahargana":1906529.2708,"sun":{"sidereal_longitude":239.6017,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":305.8456,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":66.2439,"elapsed_within_tithi_degrees":6.2439},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4,"moon_longitude":305.8456,"elapsed_within_degrees":12.5123},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":185.4473},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.319,"elongation":66.244},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.319,"opposition_distance":113.756}},"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":"05:07","sunsetLocal":"19:21","solarNoonLocal":"12:14","dayLengthHours":14.232972160091308,"dayLengthDisplay":"14 Hours 13 Mins 59 Secs","nightLengthDisplay":"9 Hours 46 Mins 01 Secs","moonriseLocal":"10:21","moonsetLocal":"23:16","rahuKala":{"name":"Rāhu Kāla","start":"17:34","end":"19:21","startHours":17.566869104231884,"endHours":19.3459906242433,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:14","end":"14:01","startHours":12.229504544197646,"endHours":14.008626064209057,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:47","end":"17:34","startHours":15.787747584220472,"endHours":17.566869104231884,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:26","end":"08:55","startHours":8.434045301506629,"endHours":8.908477706843007,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:42","end":"06:05","startHours":5.706058970822462,"endHours":6.0856048950915635,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:45","end":"12:42","startHours":11.75507213886127,"endHours":12.703936949534022,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:13","end":"04:10","startHours":3.2152888428064834,"endHours":4.164153653479237,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:56","end":"05:07","startHours":3.9269374508110486,"endHours":5.113018464151991,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:36","end":"15:33","startHours":14.60166657087953,"endHours":15.550531381552284,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:09","end":"19:33","startHours":19.1459906242433,"endHours":19.5459906242433,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:21","end":"19:56","startHours":19.3459906242433,"endHours":19.93903113091377,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:06","end":"20:51","startHours":19.0959906242433,"endHours":20.8459906242433,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:45","end":"00:42","startHours":23.75507213886127,"endHours":24.70393694953402,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:07","end":"06:54","startHours":5.113018464151991,"endHours":6.892139984163404,"quality":"inauspicious"},{"name":"Chala","start":"06:54","end":"08:40","startHours":6.892139984163404,"endHours":8.671261504174819,"quality":"neutral"},{"name":"Labha","start":"08:40","end":"10:27","startHours":8.671261504174819,"endHours":10.45038302418623,"quality":"auspicious"},{"name":"Amṛta","start":"10:27","end":"12:14","startHours":10.45038302418623,"endHours":12.229504544197646,"quality":"auspicious"},{"name":"Kāla","start":"12:14","end":"14:01","startHours":12.229504544197646,"endHours":14.008626064209057,"quality":"inauspicious"},{"name":"Śubha","start":"14:01","end":"15:47","startHours":14.008626064209057,"endHours":15.787747584220472,"quality":"auspicious"},{"name":"Roga","start":"15:47","end":"17:34","startHours":15.787747584220472,"endHours":17.566869104231884,"quality":"inauspicious"},{"name":"Udveg","start":"17:34","end":"19:21","startHours":17.566869104231884,"endHours":19.3459906242433,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:21","end":"20:34","startHours":19.3459906242433,"endHours":20.566869104231884,"quality":"auspicious"},{"name":"Roga","start":"20:34","end":"21:47","startHours":20.566869104231884,"endHours":21.787747584220472,"quality":"inauspicious"},{"name":"Udveg","start":"21:47","end":"23:01","startHours":21.787747584220472,"endHours":23.00862606420906,"quality":"inauspicious"},{"name":"Chala","start":"23:01","end":"00:14","startHours":23.00862606420906,"endHours":24.229504544197646,"quality":"neutral"},{"name":"Labha","start":"00:14","end":"01:27","startHours":24.229504544197646,"endHours":25.45038302418623,"quality":"auspicious"},{"name":"Amṛta","start":"01:27","end":"02:40","startHours":25.45038302418623,"endHours":26.67126150417482,"quality":"auspicious"},{"name":"Kāla","start":"02:40","end":"03:54","startHours":26.67126150417482,"endHours":27.892139984163407,"quality":"inauspicious"},{"name":"Śubha","start":"03:54","end":"05:07","startHours":27.892139984163407,"endHours":29.113018464151992,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:07","end":"06:07","startHours":5.113018464151991,"endHours":6.113018464151991,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:07","end":"07:07","startHours":6.113018464151991,"endHours":7.113018464151991,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:07","end":"08:07","startHours":7.113018464151991,"endHours":8.113018464151992,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:07","end":"09:07","startHours":8.113018464151992,"endHours":9.113018464151992,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:07","end":"10:07","startHours":9.113018464151992,"endHours":10.113018464151992,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:07","end":"11:07","startHours":10.113018464151992,"endHours":11.113018464151992,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:07","end":"12:07","startHours":11.113018464151992,"endHours":12.113018464151992,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:07","end":"13:07","startHours":12.113018464151992,"endHours":13.113018464151992,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:07","end":"14:07","startHours":13.113018464151992,"endHours":14.113018464151992,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:07","end":"15:07","startHours":14.113018464151992,"endHours":15.113018464151992,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:07","end":"16:07","startHours":15.113018464151992,"endHours":16.113018464151992,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:07","end":"17:07","startHours":16.113018464151992,"endHours":17.113018464151992,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:07","end":"18:07","startHours":17.113018464151992,"endHours":18.113018464151992,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:07","end":"19:07","startHours":18.113018464151992,"endHours":19.113018464151992,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:07","end":"20:07","startHours":19.113018464151992,"endHours":20.113018464151992,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:07","end":"21:07","startHours":20.113018464151992,"endHours":21.113018464151992,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:07","end":"22:07","startHours":21.113018464151992,"endHours":22.113018464151992,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:07","end":"23:07","startHours":22.113018464151992,"endHours":23.113018464151992,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:07","end":"00:07","startHours":23.113018464151992,"endHours":24.113018464151992,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:07","end":"01:07","startHours":24.113018464151992,"endHours":25.113018464151992,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:07","end":"02:07","startHours":25.113018464151992,"endHours":26.113018464151992,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:07","end":"03:07","startHours":26.113018464151992,"endHours":27.113018464151992,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:07","end":"04:07","startHours":27.113018464151992,"endHours":28.113018464151992,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:07","end":"05:07","startHours":28.113018464151992,"endHours":29.113018464151992,"planetary_lord":"Jupiter"}],"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":["Meṣa","Karka","Siṃha","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Gada","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.369086954500148,"eotMinutes":2.787727348141232,"ayanamsa":25.5148}},"calendars":{"vikram_samvat":2175,"vikram_samvatsara":"Khara","saka_samvat":2040,"saka_samvatsara":"Bahudhānya","bengali_samvat":1525,"malayalam_era":1294,"nanakshahi_year":649,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Ṣaṣṭhī · Vikram 2175 Khara · Śaka 2040 Bahudhānya"},"festivals":[{"id":"skanda-shashthi","name":"Skanda Ṣaṣṭhī","name_sanskrit":"स्कन्द षष्ठी","tradition":"Shaiva","associated_deity":"Kārttikeya / Skanda / Murugan","significance":"Kārttikeya's victory over Tāraka. Important Shaiva day in Tamil tradition.","vrata":true,"detection":{"tithi_number":6,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":3},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi_ingress":"Dhanu"},"precedence":5}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — 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 December 18, 2118 CE · Perth, Australia · Vidhyamitra","description":"December 18, 2118 CE for Perth, Australia: Śukla Ṣaṣṭhī, sūryodaya 05:07, sūryāsta 19:21.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2118-12-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2118-12-18","sa":"https://sa.vidhyamitra.com/city/perth/2118-12-18","hi":"https://hi.vidhyamitra.com/city/perth/2118-12-18","x-default":"https://vidhyamitra.com/city/perth/2118-12-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-03T02:35:34.553Z","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":"2026-06-03T02:35:34.553Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-03T02:35:34.553Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}