{"id":"vidhyamitra:city-day:perth:2027-04-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2027-04-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2027-04-04","date_display":"April 4, 2027 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":2027,"month":4,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461499.770833,"kali_year":5128,"ahargana":1873034.2708,"sun":{"sidereal_longitude":349.9164,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":314.0356,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":324.1192,"elapsed_within_tithi_degrees":0.1192},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3,"moon_longitude":314.0356,"elapsed_within_degrees":7.3689},"yoga":{"number":23,"name":"Śubha","sum_longitude":303.952},"karana":{"half_tithi_index":54,"name":"Gara"},"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":2027,"month":4,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2461499.770833,"ahargana":1873034.2708,"kali_year":5128,"ayanamsa_lahiri":24.2337,"grahas":{"sun":{"sidereal_longitude":349.817365,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":314.806965,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false,"latitude":1.2697},"mars":{"sidereal_longitude":116.34306500000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":true},"mercury":{"sidereal_longitude":327.378065,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":112.66956500000003,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":315.9141649999999,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":353.028765,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":297.6307,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":117.6307,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":4},"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":2027,"month":4,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461499.770833,"kali_year":5128,"ahargana":1873034.2708,"sun":{"sidereal_longitude":349.9164,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":314.0356,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":324.1192,"elapsed_within_tithi_degrees":0.1192},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3,"moon_longitude":314.0356,"elapsed_within_degrees":7.3689},"yoga":{"number":23,"name":"Śubha","sum_longitude":303.952},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.27,"elongation":35.881},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.27,"opposition_distance":144.119}},"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":"06:30","sunsetLocal":"18:10","solarNoonLocal":"12:20","dayLengthHours":11.66916564985485,"dayLengthDisplay":"11 Hours 40 Mins 09 Secs","nightLengthDisplay":"12 Hours 19 Mins 51 Secs","moonriseLocal":"03:37","moonsetLocal":"16:23","rahuKala":{"name":"Rāhu Kāla","start":"16:43","end":"18:10","startHours":16.70863083701107,"endHours":18.167276543242927,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:20","end":"13:47","startHours":12.332693718315504,"endHours":13.79133942454736,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:15","end":"16:43","startHours":15.249985130779216,"endHours":16.70863083701107,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:13","end":"09:37","startHours":9.220916211687543,"endHours":9.609888400016038,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:59","end":"07:18","startHours":6.984326128798696,"endHours":7.295503879461492,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:57","end":"12:43","startHours":11.943721529987007,"endHours":12.721665906643997,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:57","end":"05:43","startHours":4.942222140074097,"endHours":5.720166516731088,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:32","end":"06:30","startHours":5.5256804225668406,"endHours":6.498110893388078,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:17","end":"15:03","startHours":14.277554659957978,"endHours":15.055499036614968,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:58","end":"18:22","startHours":17.967276543242928,"endHours":18.367276543242927,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:10","end":"18:39","startHours":18.167276543242927,"endHours":18.653491778653546,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:55","end":"19:40","startHours":17.917276543242927,"endHours":19.667276543242927,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:57","end":"00:43","startHours":23.94372152998701,"endHours":24.721665906644,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:30","end":"07:57","startHours":6.498110893388078,"endHours":7.9567565996199345,"quality":"inauspicious"},{"name":"Chala","start":"07:57","end":"09:25","startHours":7.9567565996199345,"endHours":9.41540230585179,"quality":"neutral"},{"name":"Labha","start":"09:25","end":"10:52","startHours":9.41540230585179,"endHours":10.874048012083648,"quality":"auspicious"},{"name":"Amṛta","start":"10:52","end":"12:20","startHours":10.874048012083648,"endHours":12.332693718315504,"quality":"auspicious"},{"name":"Kāla","start":"12:20","end":"13:47","startHours":12.332693718315504,"endHours":13.79133942454736,"quality":"inauspicious"},{"name":"Śubha","start":"13:47","end":"15:15","startHours":13.79133942454736,"endHours":15.249985130779216,"quality":"auspicious"},{"name":"Roga","start":"15:15","end":"16:43","startHours":15.249985130779216,"endHours":16.70863083701107,"quality":"inauspicious"},{"name":"Udveg","start":"16:43","end":"18:10","startHours":16.70863083701107,"endHours":18.167276543242927,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:10","end":"19:43","startHours":18.167276543242927,"endHours":19.70863083701107,"quality":"auspicious"},{"name":"Roga","start":"19:43","end":"21:15","startHours":19.70863083701107,"endHours":21.249985130779216,"quality":"inauspicious"},{"name":"Udveg","start":"21:15","end":"22:47","startHours":21.249985130779216,"endHours":22.79133942454736,"quality":"inauspicious"},{"name":"Chala","start":"22:47","end":"00:20","startHours":22.79133942454736,"endHours":24.332693718315504,"quality":"neutral"},{"name":"Labha","start":"00:20","end":"01:52","startHours":24.332693718315504,"endHours":25.874048012083648,"quality":"auspicious"},{"name":"Amṛta","start":"01:52","end":"03:25","startHours":25.874048012083648,"endHours":27.41540230585179,"quality":"auspicious"},{"name":"Kāla","start":"03:25","end":"04:57","startHours":27.41540230585179,"endHours":28.956756599619933,"quality":"inauspicious"},{"name":"Śubha","start":"04:57","end":"06:30","startHours":28.956756599619933,"endHours":30.498110893388077,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:30","end":"07:30","startHours":6.498110893388078,"endHours":7.498110893388078,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:30","end":"08:30","startHours":7.498110893388078,"endHours":8.498110893388077,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:30","end":"09:30","startHours":8.498110893388077,"endHours":9.498110893388077,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:30","end":"10:30","startHours":9.498110893388077,"endHours":10.498110893388077,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:30","end":"11:30","startHours":10.498110893388077,"endHours":11.498110893388077,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:30","end":"12:30","startHours":11.498110893388077,"endHours":12.498110893388077,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:30","end":"13:30","startHours":12.498110893388077,"endHours":13.498110893388077,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:30","end":"14:30","startHours":13.498110893388077,"endHours":14.498110893388077,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:30","end":"15:30","startHours":14.498110893388077,"endHours":15.498110893388077,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:30","end":"16:30","startHours":15.498110893388077,"endHours":16.498110893388077,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:30","end":"17:30","startHours":16.498110893388077,"endHours":17.498110893388077,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:30","end":"18:30","startHours":17.498110893388077,"endHours":18.498110893388077,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:30","end":"19:30","startHours":18.498110893388077,"endHours":19.498110893388077,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:30","end":"20:30","startHours":19.498110893388077,"endHours":20.498110893388077,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:30","end":"21:30","startHours":20.498110893388077,"endHours":21.498110893388077,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:30","end":"22:30","startHours":21.498110893388077,"endHours":22.498110893388077,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:30","end":"23:30","startHours":22.498110893388077,"endHours":23.498110893388077,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:30","end":"00:30","startHours":23.498110893388077,"endHours":24.498110893388077,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:30","end":"01:30","startHours":24.498110893388077,"endHours":25.498110893388077,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:30","end":"02:30","startHours":25.498110893388077,"endHours":26.498110893388077,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:30","end":"03:30","startHours":26.498110893388077,"endHours":27.498110893388077,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:30","end":"04:30","startHours":27.498110893388077,"endHours":28.498110893388077,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:30","end":"05:30","startHours":28.498110893388077,"endHours":29.498110893388077,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:30","end":"06:30","startHours":29.498110893388077,"endHours":30.498110893388077,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"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":"Mātaṇga","quality":"Auspicious"},"drikRitu":"Vasanta (Spring) (Drik)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":5.541350259600011,"eotMinutes":-3.4036230989301703,"ayanamsa":24.2337}},"calendars":{"vikram_samvat":2084,"vikram_samvatsara":"Raudra","saka_samvat":1949,"saka_samvatsara":"Plavaṅga","bengali_samvat":1434,"malayalam_era":1203,"nanakshahi_year":558,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Kṛṣṇa Pakṣa","solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Kṛṣṇa Trayodaśī · Vikram 2084 Raudra · Śaka 1949 Plavaṅga"},"festivals":[{"id":"mina-sankranti","name":"Mīna Saṅkrānti","name_sanskrit":"मीन सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Pisces; Mīna-māsa begins.","vrata":false,"detection":{"sun_rashi":"Mīna"},"precedence":5},{"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":"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 April 4, 2027 CE · Perth, Australia · Vidhyamitra","description":"April 4, 2027 CE for Perth, Australia: Kṛṣṇa Trayodaśī, sūryodaya 06:30, sūryāsta 18:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2027-04-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2027-04-04","sa":"https://sa.vidhyamitra.com/city/perth/2027-04-04","hi":"https://hi.vidhyamitra.com/city/perth/2027-04-04","x-default":"https://vidhyamitra.com/city/perth/2027-04-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T16:32:59.784Z","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":"2026-05-14T16:32:59.784Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T16:32:59.784Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}