{"id":"vidhyamitra:city-day:sydney:1981-01-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/sydney/1981-01-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-01-31","date_display":"January 31, 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":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444635.770833,"kali_year":5082,"ahargana":1856170.2708,"sun":{"sidereal_longitude":287.551,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":228.8675,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":26,"name":"Ekādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ekādaśī","elongation_degrees":301.3166,"elapsed_within_tithi_degrees":1.3166},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1,"moon_longitude":228.8675,"elapsed_within_degrees":2.2009},"yoga":{"number":12,"name":"Dhruva","sum_longitude":156.4185},"karana":{"half_tithi_index":50,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":1,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444635.770833,"ahargana":1856170.2708,"kali_year":5082,"ayanamsa_lahiri":23.5887,"grahas":{"sun":{"sidereal_longitude":287.494194,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":228.920794,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false,"latitude":3.9833},"mars":{"sidereal_longitude":301.24929399999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":305.881794,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":166.79189399999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":true},"venus":{"sidereal_longitude":271.41919400000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":165.83269399999995,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":111.1665,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":291.1665,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444635.770833,"kali_year":5082,"ahargana":1856170.2708,"sun":{"sidereal_longitude":287.551,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":228.8675,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":26,"name":"Ekādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ekādaśī","elongation_degrees":301.3166,"elapsed_within_tithi_degrees":1.3166},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1,"moon_longitude":228.8675,"elapsed_within_degrees":2.2009},"yoga":{"number":12,"name":"Dhruva","sum_longitude":156.4185},"karana":{"half_tithi_index":50,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.983,"elongation":58.683},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.983,"opposition_distance":121.317}},"eclipse_window_40days":[{"offset_days":-11,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776},{"offset_days":5,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"city":{"slug":"sydney","name":"Sydney, Australia","lat":-33.8688,"lon":151.2093,"tz_offset_hours":10,"country":"AU","tier":"diaspora"},"tier2":{"city":{"slug":"sydney","name":"Sydney, Australia","lat":-33.8688,"lon":151.2093,"tz_offset_hours":10,"country":"AU","tier":"diaspora"},"sunriseLocal":"05:16","sunsetLocal":"19:02","solarNoonLocal":"12:09","dayLengthHours":13.767224786355165,"dayLengthDisplay":"13 Hours 46 Mins 02 Secs","nightLengthDisplay":"10 Hours 13 Mins 58 Secs","moonriseLocal":"01:07","moonsetLocal":"15:21","rahuKala":{"name":"Rāhu Kāla","start":"08:42","end":"10:25","startHours":8.703066945775241,"endHours":10.423970044069637,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:52","end":"15:35","startHours":13.86577624065843,"endHours":15.586679338952823,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:16","end":"06:59","startHours":5.261260749186451,"endHours":6.982163847480846,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:28","end":"08:56","startHours":8.47361319933599,"endHours":8.932520692214494,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:50","end":"06:12","startHours":5.834895115284582,"endHours":6.2020211095873865,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:41","end":"12:36","startHours":11.685965649485528,"endHours":12.60378063524254,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:26","end":"04:21","startHours":3.4256307776724286,"endHours":4.34344576342944,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:07","end":"05:16","startHours":4.113992016990187,"endHours":5.261260749186451,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:21","startHours":14.43941060675656,"endHours":15.35722559251357,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:50","end":"19:14","startHours":18.828485535541617,"endHours":19.228485535541616,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:02","end":"19:36","startHours":19.028485535541616,"endHours":19.60211990163975,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:47","end":"20:32","startHours":18.778485535541616,"endHours":20.528485535541616,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:41","end":"00:36","startHours":23.685965649485528,"endHours":24.60378063524254,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:16","end":"06:59","startHours":5.261260749186451,"endHours":6.982163847480846,"quality":"inauspicious"},{"name":"Śubha","start":"06:59","end":"08:42","startHours":6.982163847480846,"endHours":8.703066945775241,"quality":"auspicious"},{"name":"Roga","start":"08:42","end":"10:25","startHours":8.703066945775241,"endHours":10.423970044069637,"quality":"inauspicious"},{"name":"Udveg","start":"10:25","end":"12:09","startHours":10.423970044069637,"endHours":12.144873142364034,"quality":"inauspicious"},{"name":"Chala","start":"12:09","end":"13:52","startHours":12.144873142364034,"endHours":13.86577624065843,"quality":"neutral"},{"name":"Labha","start":"13:52","end":"15:35","startHours":13.86577624065843,"endHours":15.586679338952823,"quality":"auspicious"},{"name":"Amṛta","start":"15:35","end":"17:18","startHours":15.586679338952823,"endHours":17.30758243724722,"quality":"auspicious"},{"name":"Kāla","start":"17:18","end":"19:02","startHours":17.30758243724722,"endHours":19.028485535541616,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"19:02","end":"20:18","startHours":19.028485535541616,"endHours":20.30758243724722,"quality":"auspicious"},{"name":"Amṛta","start":"20:18","end":"21:35","startHours":20.30758243724722,"endHours":21.586679338952827,"quality":"auspicious"},{"name":"Kāla","start":"21:35","end":"22:52","startHours":21.586679338952827,"endHours":22.86577624065843,"quality":"inauspicious"},{"name":"Śubha","start":"22:52","end":"00:09","startHours":22.86577624065843,"endHours":24.144873142364034,"quality":"auspicious"},{"name":"Roga","start":"00:09","end":"01:25","startHours":24.144873142364034,"endHours":25.423970044069637,"quality":"inauspicious"},{"name":"Udveg","start":"01:25","end":"02:42","startHours":25.423970044069637,"endHours":26.70306694577524,"quality":"inauspicious"},{"name":"Chala","start":"02:42","end":"03:59","startHours":26.70306694577524,"endHours":27.982163847480848,"quality":"neutral"},{"name":"Labha","start":"03:59","end":"05:16","startHours":27.982163847480848,"endHours":29.26126074918645,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:16","end":"06:16","startHours":5.261260749186451,"endHours":6.261260749186451,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:16","end":"07:16","startHours":6.261260749186451,"endHours":7.261260749186451,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:16","end":"08:16","startHours":7.261260749186451,"endHours":8.261260749186452,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:16","end":"09:16","startHours":8.261260749186452,"endHours":9.261260749186452,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:16","end":"10:16","startHours":9.261260749186452,"endHours":10.261260749186452,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:16","end":"11:16","startHours":10.261260749186452,"endHours":11.261260749186452,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:16","end":"12:16","startHours":11.261260749186452,"endHours":12.261260749186452,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:16","end":"13:16","startHours":12.261260749186452,"endHours":13.261260749186452,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:16","end":"14:16","startHours":13.261260749186452,"endHours":14.261260749186452,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:16","end":"15:16","startHours":14.261260749186452,"endHours":15.261260749186452,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:16","end":"16:16","startHours":15.261260749186452,"endHours":16.26126074918645,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:16","end":"17:16","startHours":16.26126074918645,"endHours":17.26126074918645,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:16","end":"18:16","startHours":17.26126074918645,"endHours":18.26126074918645,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:16","end":"19:16","startHours":18.26126074918645,"endHours":19.26126074918645,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:16","end":"20:16","startHours":19.26126074918645,"endHours":20.26126074918645,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:16","end":"21:16","startHours":20.26126074918645,"endHours":21.26126074918645,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:16","end":"22:16","startHours":21.26126074918645,"endHours":22.26126074918645,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:16","end":"23:16","startHours":22.26126074918645,"endHours":23.26126074918645,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:16","end":"00:16","startHours":23.26126074918645,"endHours":24.26126074918645,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:16","end":"01:16","startHours":24.26126074918645,"endHours":25.26126074918645,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:16","end":"02:16","startHours":25.26126074918645,"endHours":26.26126074918645,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:16","end":"03:16","startHours":26.26126074918645,"endHours":27.26126074918645,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:16","end":"04:16","startHours":27.26126074918645,"endHours":28.26126074918645,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:16","end":"05:16","startHours":28.26126074918645,"endHours":29.26126074918645,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-East","rahuVasa":"East","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-17.445270925974306,"eotMinutes":-13.52958854184206,"ayanamsa":23.5887}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Ekādaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"shattila-ekadashi","name":"Ṣaṭ-tilā Ekādaśī","name_sanskrit":"षट्तिला एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Six uses of tila (sesame) on this Ekādaśī confer mokṣa.","vrata":true,"detection":{"tithi_number":26,"tithi_paksha":"Kṛṣṇa","lunar_month":"Māgha"},"precedence":4},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Jyeṣṭhā","url":"/day/-3137-10-20","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"sydney"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga January 31, 1981 CE · Sydney, Australia · Vidhyamitra","description":"January 31, 1981 CE for Sydney, Australia: Kṛṣṇa Ekādaśī, sūryodaya 05:16, sūryāsta 19:02.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/sydney/1981-01-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/sydney/1981-01-31","sa":"https://sa.vidhyamitra.com/city/sydney/1981-01-31","hi":"https://hi.vidhyamitra.com/city/sydney/1981-01-31","x-default":"https://vidhyamitra.com/city/sydney/1981-01-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-03T04:03:36.427Z","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":"2026-06-03T04:03:36.427Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-03T04:03:36.427Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}