{"id":"vidhyamitra:city-day:beijing:1981-04-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/beijing/1981-04-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-04-11","date_display":"April 11, 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":4,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444705.770833,"kali_year":5082,"ahargana":1856240.2708,"sun":{"sidereal_longitude":357.6675,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":79.0463,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":81.3788,"elapsed_within_tithi_degrees":9.3788},"nakshatra":{"number":6,"name":"Ārdrā","pada":4,"moon_longitude":79.0463,"elapsed_within_degrees":12.3797},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":76.7139},"karana":{"half_tithi_index":13,"name":"Vaṇija"},"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":4,"day":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444705.770833,"ahargana":1856240.2708,"kali_year":5082,"ayanamsa_lahiri":23.5914,"grahas":{"sun":{"sidereal_longitude":357.482319,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":82.14351899999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false,"latitude":-2.1394},"mars":{"sidereal_longitude":355.875119,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":341.165819,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":160.02391899999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"venus":{"sidereal_longitude":358.703619,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":161.49001899999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":107.4576,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":287.4576,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":4,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444705.770833,"kali_year":5082,"ahargana":1856240.2708,"sun":{"sidereal_longitude":357.6675,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":79.0463,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":81.3788,"elapsed_within_tithi_degrees":9.3788},"nakshatra":{"number":6,"name":"Ārdrā","pada":4,"moon_longitude":79.0463,"elapsed_within_degrees":12.3797},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":76.7139},"karana":{"half_tithi_index":13,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.139,"elongation":81.379},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.139,"opposition_distance":98.621}},"eclipse_window_40days":[]},"city":{"slug":"beijing","name":"Beijing, Beijing","lat":39.9075,"lon":116.3972,"tz_offset_hours":8,"state":"Beijing","country":"CN","tier":"mega"},"tier2":{"city":{"slug":"beijing","name":"Beijing, Beijing","lat":39.9075,"lon":116.3972,"tz_offset_hours":8,"state":"Beijing","country":"CN","tier":"mega"},"sunriseLocal":"05:44","sunsetLocal":"18:48","solarNoonLocal":"12:16","dayLengthHours":13.07304699048285,"dayLengthDisplay":"13 Hours 04 Mins 23 Secs","nightLengthDisplay":"10 Hours 55 Mins 37 Secs","moonriseLocal":"10:30","moonsetLocal":"01:19","rahuKala":{"name":"Rāhu Kāla","start":"09:00","end":"10:38","startHours":8.993969701387238,"endHours":10.628100575197593,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:54","end":"15:32","startHours":13.896362322818305,"endHours":15.530493196628662,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:44","end":"07:22","startHours":5.725707953766525,"endHours":7.359838827576882,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:47","end":"09:13","startHours":8.77608558487919,"endHours":9.211853817895285,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:16","end":"06:37","startHours":6.270418245036644,"endHours":6.61903283144952,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:42","startHours":11.826463215991854,"endHours":12.697999682024044,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:59","end":"04:51","startHours":3.982635021702145,"endHours":4.854171487734336,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:38","end":"05:44","startHours":4.636287371226288,"endHours":5.725707953766525,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:19","startHours":14.441072614088425,"endHours":15.312609080120614,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:36","end":"19:00","startHours":18.598754944249375,"endHours":18.998754944249374,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:48","end":"19:21","startHours":18.798754944249374,"endHours":19.343465235519492,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:33","end":"20:18","startHours":18.548754944249374,"endHours":20.298754944249374,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:42","startHours":23.826463215991854,"endHours":24.697999682024044,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:44","end":"07:22","startHours":5.725707953766525,"endHours":7.359838827576882,"quality":"inauspicious"},{"name":"Śubha","start":"07:22","end":"09:00","startHours":7.359838827576882,"endHours":8.993969701387238,"quality":"auspicious"},{"name":"Roga","start":"09:00","end":"10:38","startHours":8.993969701387238,"endHours":10.628100575197593,"quality":"inauspicious"},{"name":"Udveg","start":"10:38","end":"12:16","startHours":10.628100575197593,"endHours":12.262231449007949,"quality":"inauspicious"},{"name":"Chala","start":"12:16","end":"13:54","startHours":12.262231449007949,"endHours":13.896362322818305,"quality":"neutral"},{"name":"Labha","start":"13:54","end":"15:32","startHours":13.896362322818305,"endHours":15.530493196628662,"quality":"auspicious"},{"name":"Amṛta","start":"15:32","end":"17:10","startHours":15.530493196628662,"endHours":17.164624070439018,"quality":"auspicious"},{"name":"Kāla","start":"17:10","end":"18:48","startHours":17.164624070439018,"endHours":18.798754944249374,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:48","end":"20:10","startHours":18.798754944249374,"endHours":20.164624070439018,"quality":"auspicious"},{"name":"Amṛta","start":"20:10","end":"21:32","startHours":20.164624070439018,"endHours":21.53049319662866,"quality":"auspicious"},{"name":"Kāla","start":"21:32","end":"22:54","startHours":21.53049319662866,"endHours":22.896362322818305,"quality":"inauspicious"},{"name":"Śubha","start":"22:54","end":"00:16","startHours":22.896362322818305,"endHours":24.26223144900795,"quality":"auspicious"},{"name":"Roga","start":"00:16","end":"01:38","startHours":24.26223144900795,"endHours":25.628100575197593,"quality":"inauspicious"},{"name":"Udveg","start":"01:38","end":"03:00","startHours":25.628100575197593,"endHours":26.993969701387236,"quality":"inauspicious"},{"name":"Chala","start":"03:00","end":"04:22","startHours":26.993969701387236,"endHours":28.35983882757688,"quality":"neutral"},{"name":"Labha","start":"04:22","end":"05:44","startHours":28.35983882757688,"endHours":29.725707953766523,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:44","end":"06:44","startHours":5.725707953766525,"endHours":6.725707953766525,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:44","end":"07:44","startHours":6.725707953766525,"endHours":7.725707953766525,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:44","end":"08:44","startHours":7.725707953766525,"endHours":8.725707953766525,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:44","end":"09:44","startHours":8.725707953766525,"endHours":9.725707953766525,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:44","end":"10:44","startHours":9.725707953766525,"endHours":10.725707953766525,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:44","end":"11:44","startHours":10.725707953766525,"endHours":11.725707953766525,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:44","end":"12:44","startHours":11.725707953766525,"endHours":12.725707953766525,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:44","end":"13:44","startHours":12.725707953766525,"endHours":13.725707953766525,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:44","end":"14:44","startHours":13.725707953766525,"endHours":14.725707953766525,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:44","end":"15:44","startHours":14.725707953766525,"endHours":15.725707953766525,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:44","end":"16:44","startHours":15.725707953766525,"endHours":16.725707953766523,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:44","end":"17:44","startHours":16.725707953766523,"endHours":17.725707953766523,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:44","end":"18:44","startHours":17.725707953766523,"endHours":18.725707953766523,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:44","end":"19:44","startHours":18.725707953766523,"endHours":19.725707953766523,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:44","end":"20:44","startHours":19.725707953766523,"endHours":20.725707953766523,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:44","end":"21:44","startHours":20.725707953766523,"endHours":21.725707953766523,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:44","end":"22:44","startHours":21.725707953766523,"endHours":22.725707953766523,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:44","end":"23:44","startHours":22.725707953766523,"endHours":23.725707953766523,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:44","end":"00:44","startHours":23.725707953766523,"endHours":24.725707953766523,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:44","end":"01:44","startHours":24.725707953766523,"endHours":25.725707953766523,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:44","end":"02:44","startHours":25.725707953766523,"endHours":26.725707953766523,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:44","end":"03:44","startHours":26.725707953766523,"endHours":27.725707953766523,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:44","end":"04:44","startHours":27.725707953766523,"endHours":28.725707953766523,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:44","end":"05:44","startHours":28.725707953766523,"endHours":29.725707953766523,"planetary_lord":"Mercury"}],"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","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"East","anandadiYoga":{"name":"Kāladaṇḍa","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":8.222186829004404,"eotMinutes":-1.322686940476858,"ayanamsa":23.5914}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Saptamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"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":[]},"validity":{"eternal":false,"location_specific":"beijing"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 11, 1981 CE · Beijing, Beijing · Vidhyamitra","description":"April 11, 1981 CE for Beijing, Beijing: Śukla Saptamī, sūryodaya 05:44, sūryāsta 18:48.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/beijing/1981-04-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/beijing/1981-04-11","sa":"https://sa.vidhyamitra.com/city/beijing/1981-04-11","hi":"https://hi.vidhyamitra.com/city/beijing/1981-04-11","x-default":"https://vidhyamitra.com/city/beijing/1981-04-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T12:34:57.398Z","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":"2026-06-02T12:34:57.398Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T12:34:57.398Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}