{"id":"vidhyamitra:city-day:rishikesh:1916-05-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1916-05-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1916-05-13","date_display":"May 13, 1916 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":1916,"month":5,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2420996.770833,"kali_year":5018,"ahargana":1832531.2708,"sun":{"sidereal_longitude":29.4343,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":151.8098,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":122.3755,"elapsed_within_tithi_degrees":2.3755},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":151.8098,"elapsed_within_degrees":5.1432},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":181.2442},"karana":{"half_tithi_index":20,"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":1916,"month":5,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2420996.770833,"ahargana":1832531.2708,"kali_year":5018,"ayanamsa_lahiri":22.6846,"grahas":{"sun":{"sidereal_longitude":29.24917700000003,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":150.10877699999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false,"latitude":-3.3497},"mars":{"sidereal_longitude":121.50047699999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":52.17077699999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":359.332277,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":74.473277,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":80.75717700000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":283.6745,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":103.6745,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","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":1916,"month":5,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2420996.770833,"kali_year":5018,"ahargana":1832531.2708,"sun":{"sidereal_longitude":29.4343,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":151.8098,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":122.3755,"elapsed_within_tithi_degrees":2.3755},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":151.8098,"elapsed_within_degrees":5.1432},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":181.2442},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.35,"elongation":122.375},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.35,"opposition_distance":57.625}},"eclipse_window_40days":[]},"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"sunriseLocal":"05:25","sunsetLocal":"19:01","solarNoonLocal":"12:13","dayLengthHours":13.606318029439219,"dayLengthDisplay":"13 Hours 36 Mins 23 Secs","nightLengthDisplay":"10 Hours 23 Mins 37 Secs","moonriseLocal":"14:07","moonsetLocal":"02:26","rahuKala":{"name":"Rāhu Kāla","start":"08:49","end":"10:31","startHours":8.81802318024759,"endHours":10.518812933927492,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:55","end":"15:37","startHours":13.920392441287298,"endHours":15.621182194967197,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:25","end":"07:07","startHours":5.416443672887785,"endHours":7.117233426567687,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:35","end":"09:03","startHours":8.591251213090269,"endHours":9.04479514740491,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:59","end":"06:21","startHours":5.983373590781086,"endHours":6.346208738232798,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:40","startHours":11.766058753292752,"endHours":12.673146621922035,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:36","end":"04:31","startHours":3.6022679356292224,"endHours":4.509355804258504,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:17","end":"05:25","startHours":4.282583837101183,"endHours":5.416443672887785,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:29","end":"15:24","startHours":14.487322359180599,"endHours":15.39441022780988,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:49","end":"19:13","startHours":18.822761702327004,"endHours":19.222761702327002,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:01","end":"19:35","startHours":19.022761702327003,"endHours":19.589691620220304,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:46","end":"20:31","startHours":18.772761702327003,"endHours":20.522761702327003,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:40","startHours":23.76605875329275,"endHours":24.673146621922033,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:25","end":"07:07","startHours":5.416443672887785,"endHours":7.117233426567687,"quality":"inauspicious"},{"name":"Śubha","start":"07:07","end":"08:49","startHours":7.117233426567687,"endHours":8.81802318024759,"quality":"auspicious"},{"name":"Roga","start":"08:49","end":"10:31","startHours":8.81802318024759,"endHours":10.518812933927492,"quality":"inauspicious"},{"name":"Udveg","start":"10:31","end":"12:13","startHours":10.518812933927492,"endHours":12.219602687607395,"quality":"inauspicious"},{"name":"Chala","start":"12:13","end":"13:55","startHours":12.219602687607395,"endHours":13.920392441287298,"quality":"neutral"},{"name":"Labha","start":"13:55","end":"15:37","startHours":13.920392441287298,"endHours":15.621182194967197,"quality":"auspicious"},{"name":"Amṛta","start":"15:37","end":"17:19","startHours":15.621182194967197,"endHours":17.3219719486471,"quality":"auspicious"},{"name":"Kāla","start":"17:19","end":"19:01","startHours":17.3219719486471,"endHours":19.022761702327003,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"19:01","end":"20:19","startHours":19.022761702327003,"endHours":20.3219719486471,"quality":"auspicious"},{"name":"Amṛta","start":"20:19","end":"21:37","startHours":20.3219719486471,"endHours":21.621182194967197,"quality":"auspicious"},{"name":"Kāla","start":"21:37","end":"22:55","startHours":21.621182194967197,"endHours":22.920392441287294,"quality":"inauspicious"},{"name":"Śubha","start":"22:55","end":"00:13","startHours":22.920392441287294,"endHours":24.21960268760739,"quality":"auspicious"},{"name":"Roga","start":"00:13","end":"01:31","startHours":24.21960268760739,"endHours":25.518812933927492,"quality":"inauspicious"},{"name":"Udveg","start":"01:31","end":"02:49","startHours":25.518812933927492,"endHours":26.81802318024759,"quality":"inauspicious"},{"name":"Chala","start":"02:49","end":"04:07","startHours":26.81802318024759,"endHours":28.117233426567687,"quality":"neutral"},{"name":"Labha","start":"04:07","end":"05:25","startHours":28.117233426567687,"endHours":29.416443672887784,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:25","end":"06:25","startHours":5.416443672887785,"endHours":6.416443672887785,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:25","end":"07:25","startHours":6.416443672887785,"endHours":7.416443672887785,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:25","end":"08:25","startHours":7.416443672887785,"endHours":8.416443672887784,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:25","end":"09:25","startHours":8.416443672887784,"endHours":9.416443672887784,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:25","end":"10:25","startHours":9.416443672887784,"endHours":10.416443672887784,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:25","end":"11:25","startHours":10.416443672887784,"endHours":11.416443672887784,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:25","end":"12:25","startHours":11.416443672887784,"endHours":12.416443672887784,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:25","end":"13:25","startHours":12.416443672887784,"endHours":13.416443672887784,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:25","end":"14:25","startHours":13.416443672887784,"endHours":14.416443672887784,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:25","end":"15:25","startHours":14.416443672887784,"endHours":15.416443672887784,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:25","end":"16:25","startHours":15.416443672887784,"endHours":16.416443672887784,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:25","end":"17:25","startHours":16.416443672887784,"endHours":17.416443672887784,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:25","end":"18:25","startHours":17.416443672887784,"endHours":18.416443672887784,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:25","end":"19:25","startHours":18.416443672887784,"endHours":19.416443672887784,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:25","end":"20:25","startHours":19.416443672887784,"endHours":20.416443672887784,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:25","end":"21:25","startHours":20.416443672887784,"endHours":21.416443672887784,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:25","end":"22:25","startHours":21.416443672887784,"endHours":22.416443672887784,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:25","end":"23:25","startHours":22.416443672887784,"endHours":23.416443672887784,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:25","end":"00:25","startHours":23.416443672887784,"endHours":24.416443672887784,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:25","end":"01:25","startHours":24.416443672887784,"endHours":25.416443672887784,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:25","end":"02:25","startHours":25.416443672887784,"endHours":26.416443672887784,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:25","end":"03:25","startHours":26.416443672887784,"endHours":27.416443672887784,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:25","end":"04:25","startHours":27.416443672887784,"endHours":28.416443672887784,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:25","end":"05:25","startHours":28.416443672887784,"endHours":29.416443672887784,"planetary_lord":"Mercury"}],"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","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-West","rahuVasa":"East","anandadiYoga":{"name":"Śrīvatsa","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":18.248215393103976,"eotMinutes":3.7534387435564067,"ayanamsa":22.6846}},"calendars":{"vikram_samvat":1973,"vikram_samvatsara":"Śukla","saka_samvat":1838,"saka_samvatsara":"Nala","bengali_samvat":1323,"malayalam_era":1092,"nanakshahi_year":447,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","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":"Vaiśākha Śukla Ekādaśī · Vikram 1973 Śukla · Śaka 1838 Nala"},"festivals":[{"id":"mohini-ekadashi","name":"Mohinī Ekādaśī","name_sanskrit":"मोहिनी एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu (Mohinī form)","significance":"Mohinī-form of Viṣṇu deceived asuras during samudra-mathana for amṛta.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":3,"sources":["Bhāgavata 8.9"]},{"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},{"id":"vrishabha-sankranti","name":"Vṛṣabha Saṅkrānti","name_sanskrit":"वृषभ सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Taurus.","vrata":false,"detection":{"sun_rashi_ingress":"Vṛṣabha"},"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":[]},"validity":{"eternal":false,"location_specific":"rishikesh"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga May 13, 1916 CE · Ṛṣikeśa · Vidhyamitra","description":"May 13, 1916 CE for Ṛṣikeśa: Śukla Ekādaśī, sūryodaya 05:25, sūryāsta 19:01.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1916-05-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1916-05-13","sa":"https://sa.vidhyamitra.com/city/rishikesh/1916-05-13","hi":"https://hi.vidhyamitra.com/city/rishikesh/1916-05-13","x-default":"https://vidhyamitra.com/city/rishikesh/1916-05-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-30T22:46:55.378Z","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":"2026-05-30T22:46:55.378Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-30T22:46:55.378Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}