{"id":"vidhyamitra:city-day:perth:2030-04-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2030-04-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2030-04-18","date_display":"April 18, 2030 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":2030,"month":4,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2462609.770833,"kali_year":5132,"ahargana":1874144.2708,"sun":{"sidereal_longitude":3.8368,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":181.2601,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":177.4233,"elapsed_within_tithi_degrees":9.4233},"nakshatra":{"number":14,"name":"Citrā","pada":3,"moon_longitude":181.2601,"elapsed_within_degrees":7.9268},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":185.0969},"karana":{"half_tithi_index":29,"name":"Bava"},"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":2030,"month":4,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2462609.770833,"ahargana":1874144.2708,"kali_year":5132,"ayanamsa_lahiri":24.2762,"grahas":{"sun":{"sidereal_longitude":3.787255000000016,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":182.415755,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false,"latitude":-3.7966},"mars":{"sidereal_longitude":12.61865499999999,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":12.132555000000025,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":211.561055,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":true},"venus":{"sidereal_longitude":319.21395499999994,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":30.03995500000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":238.8175,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":58.8175,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","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":2030,"month":4,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2462609.770833,"kali_year":5132,"ahargana":1874144.2708,"sun":{"sidereal_longitude":3.8368,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":181.2601,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":177.4233,"elapsed_within_tithi_degrees":9.4233},"nakshatra":{"number":14,"name":"Citrā","pada":3,"moon_longitude":181.2601,"elapsed_within_degrees":7.9268},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":185.0969},"karana":{"half_tithi_index":29,"name":"Bava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.797,"elongation":177.423},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.797,"opposition_distance":2.577}},"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":"06:39","sunsetLocal":"17:53","solarNoonLocal":"12:16","dayLengthHours":11.224390145852407,"dayLengthDisplay":"11 Hours 13 Mins 28 Secs","nightLengthDisplay":"12 Hours 46 Mins 32 Secs","moonriseLocal":"17:42","moonsetLocal":"06:39","rahuKala":{"name":"Rāhu Kāla","start":"13:40","end":"15:04","startHours":13.67058405330016,"endHours":15.07363282153171,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:39","end":"08:04","startHours":6.655340212142407,"endHours":8.058388980373957,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:28","end":"10:52","startHours":9.461437748605508,"endHours":10.864486516837058,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:16","end":"09:39","startHours":9.274364579507967,"endHours":9.64851091770305,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:07","end":"07:25","startHours":7.123023134886257,"endHours":7.422340205442321,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:39","startHours":11.893388946873529,"endHours":12.64168162326369,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:10","end":"05:54","startHours":5.1587548593620856,"endHours":5.9070475357522465,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:43","end":"06:39","startHours":5.719974366654706,"endHours":6.655340212142407,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:08","end":"14:53","startHours":14.138266976044012,"endHours":14.886559652434173,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:41","end":"18:05","startHours":17.679730357994814,"endHours":18.079730357994812,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:53","end":"18:21","startHours":17.879730357994813,"endHours":18.347413280738664,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:38","end":"19:23","startHours":17.629730357994813,"endHours":19.379730357994813,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:39","startHours":23.893388946873532,"endHours":24.64168162326369,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:39","end":"08:04","startHours":6.655340212142407,"endHours":8.058388980373957,"quality":"auspicious"},{"name":"Roga","start":"08:04","end":"09:28","startHours":8.058388980373957,"endHours":9.461437748605508,"quality":"inauspicious"},{"name":"Udveg","start":"09:28","end":"10:52","startHours":9.461437748605508,"endHours":10.864486516837058,"quality":"inauspicious"},{"name":"Chala","start":"10:52","end":"12:16","startHours":10.864486516837058,"endHours":12.267535285068611,"quality":"neutral"},{"name":"Labha","start":"12:16","end":"13:40","startHours":12.267535285068611,"endHours":13.67058405330016,"quality":"auspicious"},{"name":"Amṛta","start":"13:40","end":"15:04","startHours":13.67058405330016,"endHours":15.07363282153171,"quality":"auspicious"},{"name":"Kāla","start":"15:04","end":"16:29","startHours":15.07363282153171,"endHours":16.476681589763263,"quality":"inauspicious"},{"name":"Śubha","start":"16:29","end":"17:53","startHours":16.476681589763263,"endHours":17.879730357994813,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:53","end":"19:29","startHours":17.879730357994813,"endHours":19.476681589763263,"quality":"auspicious"},{"name":"Kāla","start":"19:29","end":"21:04","startHours":19.476681589763263,"endHours":21.07363282153171,"quality":"inauspicious"},{"name":"Śubha","start":"21:04","end":"22:40","startHours":21.07363282153171,"endHours":22.67058405330016,"quality":"auspicious"},{"name":"Roga","start":"22:40","end":"00:16","startHours":22.67058405330016,"endHours":24.26753528506861,"quality":"inauspicious"},{"name":"Udveg","start":"00:16","end":"01:52","startHours":24.26753528506861,"endHours":25.864486516837058,"quality":"inauspicious"},{"name":"Chala","start":"01:52","end":"03:28","startHours":25.864486516837058,"endHours":27.46143774860551,"quality":"neutral"},{"name":"Labha","start":"03:28","end":"05:04","startHours":27.46143774860551,"endHours":29.058388980373955,"quality":"auspicious"},{"name":"Amṛta","start":"05:04","end":"06:39","startHours":29.058388980373955,"endHours":30.655340212142406,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:39","end":"07:39","startHours":6.655340212142407,"endHours":7.655340212142407,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:39","end":"08:39","startHours":7.655340212142407,"endHours":8.655340212142406,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:39","end":"09:39","startHours":8.655340212142406,"endHours":9.655340212142406,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:39","end":"10:39","startHours":9.655340212142406,"endHours":10.655340212142406,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:39","end":"11:39","startHours":10.655340212142406,"endHours":11.655340212142406,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:39","end":"12:39","startHours":11.655340212142406,"endHours":12.655340212142406,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:39","end":"13:39","startHours":12.655340212142406,"endHours":13.655340212142406,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:39","end":"14:39","startHours":13.655340212142406,"endHours":14.655340212142406,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:39","end":"15:39","startHours":14.655340212142406,"endHours":15.655340212142406,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:39","end":"16:39","startHours":15.655340212142406,"endHours":16.655340212142406,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:39","end":"17:39","startHours":16.655340212142406,"endHours":17.655340212142406,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:39","end":"18:39","startHours":17.655340212142406,"endHours":18.655340212142406,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:39","end":"19:39","startHours":18.655340212142406,"endHours":19.655340212142406,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:39","end":"20:39","startHours":19.655340212142406,"endHours":20.655340212142406,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:39","end":"21:39","startHours":20.655340212142406,"endHours":21.655340212142406,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:39","end":"22:39","startHours":21.655340212142406,"endHours":22.655340212142406,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:39","end":"23:39","startHours":22.655340212142406,"endHours":23.655340212142406,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:39","end":"00:39","startHours":23.655340212142406,"endHours":24.655340212142406,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:39","end":"01:39","startHours":24.655340212142406,"endHours":25.655340212142406,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:39","end":"02:39","startHours":25.655340212142406,"endHours":26.655340212142406,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:39","end":"03:39","startHours":26.655340212142406,"endHours":27.655340212142406,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:39","end":"04:39","startHours":27.655340212142406,"endHours":28.655340212142406,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:39","end":"05:39","startHours":28.655340212142406,"endHours":29.655340212142406,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:39","end":"06:39","startHours":29.655340212142406,"endHours":30.655340212142406,"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":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"North","rahuVasa":"North-West","anandadiYoga":{"name":"Kāladaṇḍa","quality":"Inauspicious"},"drikRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":10.784343688677437,"eotMinutes":0.5058828958834352,"ayanamsa":24.2762}},"calendars":{"vikram_samvat":2087,"vikram_samvatsara":"Rudhirodgāri","saka_samvat":1952,"saka_samvatsara":"Sādhāraṇa","bengali_samvat":1437,"malayalam_era":1206,"nanakshahi_year":561,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Pūrṇimā · Vikram 2087 Rudhirodgāri · Śaka 1952 Sādhāraṇa"},"festivals":[{"id":"buddha-purnima","name":"Buddha Pūrṇimā","name_sanskrit":"बुद्ध पूर्णिमा","name_alternates":["Vesak","Vaiśākhī Pūrṇimā","Vesakha"],"tradition":"Pan-Hindu","associated_deity":"Buddha (21st avatāra of Krishna per Bhāgavata 1.3.24)","deity_avatara_index":21,"significance":"Buddha's birth, enlightenment, and mahāparinirvāṇa all on this Vaiśākha Pūrṇimā. Most sacred Buddhist + Vaishnava day.","vrata":true,"primary_observance":"Day-long observance of compassion (karuṇā) and ahiṁsā; Buddha-stuti at sunset","detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":1,"related_chart":"buddha","historical_anchor":{"event":"Bhagavān Buddha's birth at Lumbinī","date_julian":"-0562-04-11","location":"Lumbinī, Nepal"},"sources":["Bhāgavata Purāṇa 1.3.24","Pāli Tipiṭaka","Buddhacarita by Aśvaghoṣa"]},{"id":"mesha-sankranti","name":"Meṣa Saṅkrānti (Vaiśākhī / Vishu / Pohelā Boishākh / Bihu)","name_sanskrit":"मेष सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aries; solar new year. Regional: Vaiśākhī (Punjab) · Vishu (Kerala) · Pohelā Boishākh (Bengal) · Bihu (Assam) · Tamil Puthāṇḍu.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":1},{"id":"baisakhi","name":"Baisakhi (Vaiśākhī)","name_sanskrit":"वैशाखी","tradition":"Regional","associated_deity":"Sūrya + Khalsa Pantha (Sikh)","significance":"Punjab New Year + Sikh Khalsa founding day.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":2},{"id":"kurma-jayanti","name":"Kūrma Jayantī","name_sanskrit":"कूर्म जयन्ती","tradition":"Vaishnava","associated_deity":"Kūrma (2nd avatāra of Krishna)","deity_avatara_index":11,"significance":"Kūrma supports Mount Mandara during the Sāgara-mathana (churning of the cosmic ocean).","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":4,"sources":["Bhāgavata 8.7-8"]},{"id":"chandika-jayanti","name":"Chaṇḍikā Jayantī","name_sanskrit":"चण्डिका जयन्ती","tradition":"Shakta","associated_deity":"Devī Chaṇḍikā","significance":"Devī's fierce protective form. Often coincides with Buddha Pūrṇimā.","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":5},{"id":"chitra-paurnami","name":"Citrā Paurṇamī","name_sanskrit":"चित्रा पौर्णमी","tradition":"Regional","significance":"Tamil regional Vaiśākha Pūrṇimā observance; honors Citragupta.","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":6},{"id":"vaishakha-purnima-vrat","name":"Vaiśākha Pūrṇimā Vrat","name_sanskrit":"वैशाख पूर्णिमा व्रत","tradition":"Pan-Hindu","significance":"General Pūrṇimā vrat in Vaiśākha (highly auspicious month).","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":7}],"todays_walk":{"walk":{"id":"buddha-purnima-walk","name":"Buddha Pūrṇimā Walk","name_sanskrit":"बुद्ध पूर्णिमा यात्रा","type":"festival","description":"Bhāgavata 1.3.24 (Buddha as 21st avatāra) + BG 12.13 (compassion) + Dhammapada parallels.","step_count":7,"url":"/walk/buddha-purnima-walk"},"reason":"Today is Buddha Pūrṇimā — its dedicated walk."},"cosmic_resonances":[{"historical_date":"-3137-10-04","event":"Mahābhārata Day 1 (Bhagavad Gītā delivered)","chart_id":"krishna","shared_marker":"same Śukla Pūrṇimā","url":"/day/-3137-10-04","relevance":0.5},{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Śukla Pūrṇimā","url":"/day/-0562-04-11","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 April 18, 2030 CE · Perth, Australia · Vidhyamitra","description":"April 18, 2030 CE for Perth, Australia: Śukla Pūrṇimā, sūryodaya 06:39, sūryāsta 17:53.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2030-04-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2030-04-18","sa":"https://sa.vidhyamitra.com/city/perth/2030-04-18","hi":"https://hi.vidhyamitra.com/city/perth/2030-04-18","x-default":"https://vidhyamitra.com/city/perth/2030-04-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T21:12:59.960Z","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":"2026-05-14T21:12:59.960Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T21:12:59.960Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}