{"id":"vidhyamitra:city-day:perth:1981-05-24:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1981-05-24","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-05-24","date_display":"May 24, 1981 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":1981,"month":5,"day":24,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444748.770833,"kali_year":5083,"ahargana":1856283.2708,"sun":{"sidereal_longitude":39.1729,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":278.8344,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":20,"name":"Pañcamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pañcamī","elongation_degrees":239.6615,"elapsed_within_tithi_degrees":11.6615},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4,"moon_longitude":278.8344,"elapsed_within_degrees":12.1678},"yoga":{"number":24,"name":"Śukla","sum_longitude":318.0073},"karana":{"half_tithi_index":39,"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":1981,"month":5,"day":24,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444748.770833,"ahargana":1856283.2708,"kali_year":5083,"ayanamsa_lahiri":23.5931,"grahas":{"sun":{"sidereal_longitude":39.20327600000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":275.4171759999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false,"latitude":0.4968},"mars":{"sidereal_longitude":27.870676000000003,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":62.06057599999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":157.050976,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":51.69637599999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":159.28457600000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":105.1793,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":285.1793,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":5,"day":24,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444748.770833,"kali_year":5083,"ahargana":1856283.2708,"sun":{"sidereal_longitude":39.1729,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":278.8344,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":20,"name":"Pañcamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pañcamī","elongation_degrees":239.6615,"elapsed_within_tithi_degrees":11.6615},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4,"moon_longitude":278.8344,"elapsed_within_degrees":12.1678},"yoga":{"number":24,"name":"Śukla","sum_longitude":318.0073},"karana":{"half_tithi_index":39,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.497,"elongation":120.338},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.497,"opposition_distance":59.662}},"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":"07:04","sunsetLocal":"17:23","solarNoonLocal":"12:13","dayLengthHours":10.324663973626656,"dayLengthDisplay":"10 Hours 19 Mins 29 Secs","nightLengthDisplay":"13 Hours 40 Mins 31 Secs","moonriseLocal":"21:02","moonsetLocal":"10:55","rahuKala":{"name":"Rāhu Kāla","start":"16:06","end":"17:23","startHours":16.092535660588492,"endHours":17.383118657291824,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:13","end":"13:31","startHours":12.220786670478496,"endHours":13.511369667181828,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:48","end":"16:06","startHours":14.80195266388516,"endHours":16.092535660588492,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:28","end":"09:49","startHours":9.467542944178055,"endHours":9.81169840996561,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:29","end":"07:46","startHours":7.488649015899612,"endHours":7.7639733885296565,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:53","end":"12:34","startHours":11.876631204690941,"endHours":12.564942136266051,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:41","end":"06:22","startHours":5.6818328205149475,"endHours":6.370143752090058,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:12","end":"07:04","startHours":6.19806601919628,"endHours":7.058454683665168,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:56","end":"14:38","startHours":13.941563999416271,"endHours":14.629874930991381,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:11","end":"17:35","startHours":17.183118657291825,"endHours":17.583118657291823,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:23","end":"17:49","startHours":17.383118657291824,"endHours":17.813312989526267,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:08","end":"18:53","startHours":17.133118657291824,"endHours":18.883118657291824,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:53","end":"00:34","startHours":23.87663120469094,"endHours":24.56494213626605,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"07:04","end":"08:21","startHours":7.058454683665168,"endHours":8.3490376803685,"quality":"inauspicious"},{"name":"Chala","start":"08:21","end":"09:38","startHours":8.3490376803685,"endHours":9.639620677071832,"quality":"neutral"},{"name":"Labha","start":"09:38","end":"10:56","startHours":9.639620677071832,"endHours":10.930203673775164,"quality":"auspicious"},{"name":"Amṛta","start":"10:56","end":"12:13","startHours":10.930203673775164,"endHours":12.220786670478496,"quality":"auspicious"},{"name":"Kāla","start":"12:13","end":"13:31","startHours":12.220786670478496,"endHours":13.511369667181828,"quality":"inauspicious"},{"name":"Śubha","start":"13:31","end":"14:48","startHours":13.511369667181828,"endHours":14.80195266388516,"quality":"auspicious"},{"name":"Roga","start":"14:48","end":"16:06","startHours":14.80195266388516,"endHours":16.092535660588492,"quality":"inauspicious"},{"name":"Udveg","start":"16:06","end":"17:23","startHours":16.092535660588492,"endHours":17.383118657291824,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:23","end":"19:06","startHours":17.383118657291824,"endHours":19.092535660588492,"quality":"auspicious"},{"name":"Roga","start":"19:06","end":"20:48","startHours":19.092535660588492,"endHours":20.80195266388516,"quality":"inauspicious"},{"name":"Udveg","start":"20:48","end":"22:31","startHours":20.80195266388516,"endHours":22.511369667181828,"quality":"inauspicious"},{"name":"Chala","start":"22:31","end":"00:13","startHours":22.511369667181828,"endHours":24.220786670478496,"quality":"neutral"},{"name":"Labha","start":"00:13","end":"01:56","startHours":24.220786670478496,"endHours":25.930203673775164,"quality":"auspicious"},{"name":"Amṛta","start":"01:56","end":"03:38","startHours":25.930203673775164,"endHours":27.639620677071832,"quality":"auspicious"},{"name":"Kāla","start":"03:38","end":"05:21","startHours":27.639620677071832,"endHours":29.3490376803685,"quality":"inauspicious"},{"name":"Śubha","start":"05:21","end":"07:04","startHours":29.3490376803685,"endHours":31.05845468366517,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:04","end":"08:04","startHours":7.058454683665168,"endHours":8.058454683665168,"planetary_lord":"Sun"},{"name":"Hora 2","start":"08:04","end":"09:04","startHours":8.058454683665168,"endHours":9.058454683665168,"planetary_lord":"Mars"},{"name":"Hora 3","start":"09:04","end":"10:04","startHours":9.058454683665168,"endHours":10.058454683665168,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"10:04","end":"11:04","startHours":10.058454683665168,"endHours":11.058454683665168,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"11:04","end":"12:04","startHours":11.058454683665168,"endHours":12.058454683665168,"planetary_lord":"Moon"},{"name":"Hora 6","start":"12:04","end":"13:04","startHours":12.058454683665168,"endHours":13.058454683665168,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"13:04","end":"14:04","startHours":13.058454683665168,"endHours":14.058454683665168,"planetary_lord":"Venus"},{"name":"Hora 8","start":"14:04","end":"15:04","startHours":14.058454683665168,"endHours":15.058454683665168,"planetary_lord":"Sun"},{"name":"Hora 9","start":"15:04","end":"16:04","startHours":15.058454683665168,"endHours":16.05845468366517,"planetary_lord":"Mars"},{"name":"Hora 10","start":"16:04","end":"17:04","startHours":16.05845468366517,"endHours":17.05845468366517,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"17:04","end":"18:04","startHours":17.05845468366517,"endHours":18.05845468366517,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"18:04","end":"19:04","startHours":18.05845468366517,"endHours":19.05845468366517,"planetary_lord":"Moon"},{"name":"Hora 13","start":"19:04","end":"20:04","startHours":19.05845468366517,"endHours":20.05845468366517,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"20:04","end":"21:04","startHours":20.05845468366517,"endHours":21.05845468366517,"planetary_lord":"Venus"},{"name":"Hora 15","start":"21:04","end":"22:04","startHours":21.05845468366517,"endHours":22.05845468366517,"planetary_lord":"Sun"},{"name":"Hora 16","start":"22:04","end":"23:04","startHours":22.05845468366517,"endHours":23.05845468366517,"planetary_lord":"Mars"},{"name":"Hora 17","start":"23:04","end":"00:04","startHours":23.05845468366517,"endHours":24.05845468366517,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"00:04","end":"01:04","startHours":24.05845468366517,"endHours":25.05845468366517,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"01:04","end":"02:04","startHours":25.05845468366517,"endHours":26.05845468366517,"planetary_lord":"Moon"},{"name":"Hora 20","start":"02:04","end":"03:04","startHours":26.05845468366517,"endHours":27.05845468366517,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"03:04","end":"04:04","startHours":27.05845468366517,"endHours":28.05845468366517,"planetary_lord":"Venus"},{"name":"Hora 22","start":"04:04","end":"05:04","startHours":28.05845468366517,"endHours":29.05845468366517,"planetary_lord":"Sun"},{"name":"Hora 23","start":"05:04","end":"06:04","startHours":29.05845468366517,"endHours":30.05845468366517,"planetary_lord":"Mars"},{"name":"Hora 24","start":"06:04","end":"07:04","startHours":30.05845468366517,"endHours":31.05845468366517,"planetary_lord":"Jupiter"}],"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":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"drikRitu":"Grīṣma (Summer) (Drik)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":20.716135256648375,"eotMinutes":3.3107997712901853,"ayanamsa":23.5931}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Kṛṣṇa Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa Pañcamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"vrishabha-sankranti","name":"Vṛṣabha Saṅkrānti","name_sanskrit":"वृषभ सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Taurus.","vrata":false,"detection":{"sun_rashi":"Vṛṣabha"},"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 May 24, 1981 CE · Perth, Australia · Vidhyamitra","description":"May 24, 1981 CE for Perth, Australia: Kṛṣṇa Pañcamī, sūryodaya 07:04, sūryāsta 17:23.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1981-05-24","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1981-05-24","sa":"https://sa.vidhyamitra.com/city/perth/1981-05-24","hi":"https://hi.vidhyamitra.com/city/perth/1981-05-24","x-default":"https://vidhyamitra.com/city/perth/1981-05-24"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T08:05:03.951Z","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":"2026-05-18T08:05:03.951Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T08:05:03.951Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}