{"id":"vidhyamitra:city-day:howrah:1981-04-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/howrah/1981-04-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-04-15","date_display":"April 15, 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":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444709.770833,"kali_year":5082,"ahargana":1856244.2708,"sun":{"sidereal_longitude":1.5746,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":132.1093,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":130.5346,"elapsed_within_tithi_degrees":10.5346},"nakshatra":{"number":10,"name":"Maghā","pada":4,"moon_longitude":132.1093,"elapsed_within_degrees":12.1093},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":133.6839},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444709.770833,"ahargana":1856244.2708,"kali_year":5082,"ayanamsa_lahiri":23.5916,"grahas":{"sun":{"sidereal_longitude":1.402466000000004,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":133.620366,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false,"latitude":1.8905},"mars":{"sidereal_longitude":358.915066,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":348.383066,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":159.56786599999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":3.653566000000012,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":161.19926599999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":107.2457,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":287.2457,"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":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444709.770833,"kali_year":5082,"ahargana":1856244.2708,"sun":{"sidereal_longitude":1.5746,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":132.1093,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":130.5346,"elapsed_within_tithi_degrees":10.5346},"nakshatra":{"number":10,"name":"Maghā","pada":4,"moon_longitude":132.1093,"elapsed_within_degrees":12.1093},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":133.6839},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.89,"elongation":130.535},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.89,"opposition_distance":49.465}},"eclipse_window_40days":[]},"city":{"slug":"howrah","name":"Howrah, West Bengal","lat":22.5958,"lon":88.2636,"tz_offset_hours":5.5,"state":"West Bengal","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"howrah","name":"Howrah, West Bengal","lat":22.5958,"lon":88.2636,"tz_offset_hours":5.5,"state":"West Bengal","country":"IN","tier":"tier-1"},"sunriseLocal":"05:17","sunsetLocal":"17:57","solarNoonLocal":"11:37","dayLengthHours":12.664872068146668,"dayLengthDisplay":"12 Hours 39 Mins 54 Secs","nightLengthDisplay":"11 Hours 20 Mins 06 Secs","moonriseLocal":"14:09","moonsetLocal":"02:44","rahuKala":{"name":"Rāhu Kāla","start":"11:37","end":"13:12","startHours":11.619762067630116,"endHours":13.202871076148451,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:52","end":"08:27","startHours":6.870435042075117,"endHours":8.45354405059345,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:02","end":"11:37","startHours":10.036653059111785,"endHours":11.619762067630116,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:15","end":"08:40","startHours":8.242462849457672,"endHours":8.664625251729229,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:49","end":"06:09","startHours":5.815029036396227,"endHours":6.152758958213472,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:12","end":"12:03","startHours":11.197599665358563,"endHours":12.041924469901673,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:36","end":"04:27","startHours":3.598676424470561,"endHours":4.443001229013672,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:14","end":"05:17","startHours":4.231920027877894,"endHours":5.287326033556783,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:44","end":"14:34","startHours":13.730574078987896,"endHours":14.574898883531008,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:45","end":"18:09","startHours":17.752198101703453,"endHours":18.15219810170345,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:57","end":"18:29","startHours":17.952198101703452,"endHours":18.479901104542897,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:42","end":"19:27","startHours":17.702198101703452,"endHours":19.452198101703452,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:12","end":"00:03","startHours":23.197599665358563,"endHours":24.041924469901677,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:17","end":"06:52","startHours":5.287326033556783,"endHours":6.870435042075117,"quality":"auspicious"},{"name":"Amṛta","start":"06:52","end":"08:27","startHours":6.870435042075117,"endHours":8.45354405059345,"quality":"auspicious"},{"name":"Kāla","start":"08:27","end":"10:02","startHours":8.45354405059345,"endHours":10.036653059111785,"quality":"inauspicious"},{"name":"Śubha","start":"10:02","end":"11:37","startHours":10.036653059111785,"endHours":11.619762067630116,"quality":"auspicious"},{"name":"Roga","start":"11:37","end":"13:12","startHours":11.619762067630116,"endHours":13.202871076148451,"quality":"inauspicious"},{"name":"Udveg","start":"13:12","end":"14:47","startHours":13.202871076148451,"endHours":14.785980084666786,"quality":"inauspicious"},{"name":"Chala","start":"14:47","end":"16:22","startHours":14.785980084666786,"endHours":16.369089093185117,"quality":"neutral"},{"name":"Labha","start":"16:22","end":"17:57","startHours":16.369089093185117,"endHours":17.952198101703452,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"17:57","end":"19:22","startHours":17.952198101703452,"endHours":19.369089093185117,"quality":"inauspicious"},{"name":"Chala","start":"19:22","end":"20:47","startHours":19.369089093185117,"endHours":20.785980084666786,"quality":"neutral"},{"name":"Labha","start":"20:47","end":"22:12","startHours":20.785980084666786,"endHours":22.20287107614845,"quality":"auspicious"},{"name":"Amṛta","start":"22:12","end":"23:37","startHours":22.20287107614845,"endHours":23.61976206763012,"quality":"auspicious"},{"name":"Kāla","start":"23:37","end":"01:02","startHours":23.61976206763012,"endHours":25.036653059111785,"quality":"inauspicious"},{"name":"Śubha","start":"01:02","end":"02:27","startHours":25.036653059111785,"endHours":26.45354405059345,"quality":"auspicious"},{"name":"Roga","start":"02:27","end":"03:52","startHours":26.45354405059345,"endHours":27.870435042075115,"quality":"inauspicious"},{"name":"Udveg","start":"03:52","end":"05:17","startHours":27.870435042075115,"endHours":29.287326033556784,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:17","end":"06:17","startHours":5.287326033556783,"endHours":6.287326033556783,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:17","end":"07:17","startHours":6.287326033556783,"endHours":7.287326033556783,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:17","end":"08:17","startHours":7.287326033556783,"endHours":8.287326033556784,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:17","end":"09:17","startHours":8.287326033556784,"endHours":9.287326033556784,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:17","end":"10:17","startHours":9.287326033556784,"endHours":10.287326033556784,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:17","end":"11:17","startHours":10.287326033556784,"endHours":11.287326033556784,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:17","end":"12:17","startHours":11.287326033556784,"endHours":12.287326033556784,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:17","end":"13:17","startHours":12.287326033556784,"endHours":13.287326033556784,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:17","end":"14:17","startHours":13.287326033556784,"endHours":14.287326033556784,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:17","end":"15:17","startHours":14.287326033556784,"endHours":15.287326033556784,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:17","end":"16:17","startHours":15.287326033556784,"endHours":16.287326033556784,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:17","end":"17:17","startHours":16.287326033556784,"endHours":17.287326033556784,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:17","end":"18:17","startHours":17.287326033556784,"endHours":18.287326033556784,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:17","end":"19:17","startHours":18.287326033556784,"endHours":19.287326033556784,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:17","end":"20:17","startHours":19.287326033556784,"endHours":20.287326033556784,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:17","end":"21:17","startHours":20.287326033556784,"endHours":21.287326033556784,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:17","end":"22:17","startHours":21.287326033556784,"endHours":22.287326033556784,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:17","end":"23:17","startHours":22.287326033556784,"endHours":23.287326033556784,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:17","end":"00:17","startHours":23.287326033556784,"endHours":24.287326033556784,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:17","end":"01:17","startHours":24.287326033556784,"endHours":25.287326033556784,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:17","end":"02:17","startHours":25.287326033556784,"endHours":26.287326033556784,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:17","end":"03:17","startHours":26.287326033556784,"endHours":27.287326033556784,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:17","end":"04:17","startHours":27.287326033556784,"endHours":28.287326033556784,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:17","end":"05:17","startHours":28.287326033556784,"endHours":29.287326033556784,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"West","rahuVasa":"South-West","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":9.674558171674363,"eotMinutes":-0.240124057807095,"ayanamsa":23.5916}},"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":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Ekādaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"kamada-ekadashi","name":"Kāmadā Ekādaśī","name_sanskrit":"कामदा एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Fulfills righteous desires; removes brahma-hatyā.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Caitra"},"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":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"howrah"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 15, 1981 CE · Howrah, West Bengal · Vidhyamitra","description":"April 15, 1981 CE for Howrah, West Bengal: Śukla Ekādaśī, sūryodaya 05:17, sūryāsta 17:57.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/howrah/1981-04-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/howrah/1981-04-15","sa":"https://sa.vidhyamitra.com/city/howrah/1981-04-15","hi":"https://hi.vidhyamitra.com/city/howrah/1981-04-15","x-default":"https://vidhyamitra.com/city/howrah/1981-04-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T11:37:18.819Z","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":"2026-05-31T11:37:18.819Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T11:37:18.819Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}