{"id":"vidhyamitra:city-day:rishikesh:1915-04-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1915-04-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1915-04-13","date_display":"April 13, 1915 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":1915,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2420600.770833,"kali_year":5016,"ahargana":1832135.2708,"sun":{"sidereal_longitude":359.6985,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":344.0988,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":344.4003,"elapsed_within_tithi_degrees":8.4003},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4,"moon_longitude":344.0988,"elapsed_within_degrees":10.7655},"yoga":{"number":26,"name":"Indra","sum_longitude":343.7974},"karana":{"half_tithi_index":57,"name":"Śakuni"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1915,"month":4,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2420600.770833,"ahargana":1832135.2708,"kali_year":5016,"ayanamsa_lahiri":22.6695,"grahas":{"sun":{"sidereal_longitude":359.365707,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":343.176407,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false,"latitude":2.8571},"mars":{"sidereal_longitude":335.53920700000003,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":342.172307,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":324.19720699999993,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":321.942307,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":65.25190700000002,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":304.6565,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":124.6565,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","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":1915,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2420600.770833,"kali_year":5016,"ahargana":1832135.2708,"sun":{"sidereal_longitude":359.6985,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":344.0988,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":344.4003,"elapsed_within_tithi_degrees":8.4003},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4,"moon_longitude":344.0988,"elapsed_within_degrees":10.7655},"yoga":{"number":26,"name":"Indra","sum_longitude":343.7974},"karana":{"half_tithi_index":57,"name":"Śakuni"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.857,"elongation":15.6},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.857,"opposition_distance":164.4}},"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":"05:54","sunsetLocal":"18:42","solarNoonLocal":"12:18","dayLengthHours":12.799206034071894,"dayLengthDisplay":"12 Hours 47 Mins 57 Secs","nightLengthDisplay":"11 Hours 12 Mins 03 Secs","moonriseLocal":"05:05","moonsetLocal":"17:21","rahuKala":{"name":"Rāhu Kāla","start":"15:30","end":"17:06","startHours":15.494791689013049,"endHours":17.094692443272034,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:06","end":"10:42","startHours":9.095188671977102,"endHours":10.695089426236088,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:18","end":"13:54","startHours":12.294990180495073,"endHours":13.894890934754061,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:53","end":"09:19","startHours":8.881868571409235,"endHours":9.308508772544966,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:26","end":"06:46","startHours":6.42868741487879,"endHours":6.769999575787374,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:43","startHours":11.868349979359344,"endHours":12.721630381630803,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:11","end":"05:03","startHours":4.1888263589162085,"endHours":5.042106761187668,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:50","end":"05:54","startHours":4.828786660619803,"endHours":5.8953871634591275,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:17","startHours":14.428191186173724,"endHours":15.281471588445184,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:30","end":"18:54","startHours":18.49459319753102,"endHours":18.89459319753102,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:42","end":"19:14","startHours":18.69459319753102,"endHours":19.22789344895068,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:27","end":"20:12","startHours":18.44459319753102,"endHours":20.19459319753102,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:43","startHours":23.868349979359344,"endHours":24.721630381630803,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"05:54","end":"07:30","startHours":5.8953871634591275,"endHours":7.495287917718114,"quality":"inauspicious"},{"name":"Udveg","start":"07:30","end":"09:06","startHours":7.495287917718114,"endHours":9.095188671977102,"quality":"inauspicious"},{"name":"Chala","start":"09:06","end":"10:42","startHours":9.095188671977102,"endHours":10.695089426236088,"quality":"neutral"},{"name":"Labha","start":"10:42","end":"12:18","startHours":10.695089426236088,"endHours":12.294990180495073,"quality":"auspicious"},{"name":"Amṛta","start":"12:18","end":"13:54","startHours":12.294990180495073,"endHours":13.894890934754061,"quality":"auspicious"},{"name":"Kāla","start":"13:54","end":"15:30","startHours":13.894890934754061,"endHours":15.494791689013049,"quality":"inauspicious"},{"name":"Śubha","start":"15:30","end":"17:06","startHours":15.494791689013049,"endHours":17.094692443272034,"quality":"auspicious"},{"name":"Roga","start":"17:06","end":"18:42","startHours":17.094692443272034,"endHours":18.69459319753102,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:42","end":"20:06","startHours":18.69459319753102,"endHours":20.094692443272034,"quality":"inauspicious"},{"name":"Śubha","start":"20:06","end":"21:30","startHours":20.094692443272034,"endHours":21.49479168901305,"quality":"auspicious"},{"name":"Roga","start":"21:30","end":"22:54","startHours":21.49479168901305,"endHours":22.89489093475406,"quality":"inauspicious"},{"name":"Udveg","start":"22:54","end":"00:18","startHours":22.89489093475406,"endHours":24.294990180495073,"quality":"inauspicious"},{"name":"Chala","start":"00:18","end":"01:42","startHours":24.294990180495073,"endHours":25.695089426236088,"quality":"neutral"},{"name":"Labha","start":"01:42","end":"03:06","startHours":25.695089426236088,"endHours":27.0951886719771,"quality":"auspicious"},{"name":"Amṛta","start":"03:06","end":"04:30","startHours":27.0951886719771,"endHours":28.495287917718112,"quality":"auspicious"},{"name":"Kāla","start":"04:30","end":"05:54","startHours":28.495287917718112,"endHours":29.895387163459127,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:54","end":"06:54","startHours":5.8953871634591275,"endHours":6.8953871634591275,"planetary_lord":"Mars"},{"name":"Hora 2","start":"06:54","end":"07:54","startHours":6.8953871634591275,"endHours":7.8953871634591275,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"07:54","end":"08:54","startHours":7.8953871634591275,"endHours":8.895387163459127,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"08:54","end":"09:54","startHours":8.895387163459127,"endHours":9.895387163459127,"planetary_lord":"Moon"},{"name":"Hora 5","start":"09:54","end":"10:54","startHours":9.895387163459127,"endHours":10.895387163459127,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"10:54","end":"11:54","startHours":10.895387163459127,"endHours":11.895387163459127,"planetary_lord":"Venus"},{"name":"Hora 7","start":"11:54","end":"12:54","startHours":11.895387163459127,"endHours":12.895387163459127,"planetary_lord":"Sun"},{"name":"Hora 8","start":"12:54","end":"13:54","startHours":12.895387163459127,"endHours":13.895387163459127,"planetary_lord":"Mars"},{"name":"Hora 9","start":"13:54","end":"14:54","startHours":13.895387163459127,"endHours":14.895387163459127,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"14:54","end":"15:54","startHours":14.895387163459127,"endHours":15.895387163459127,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"15:54","end":"16:54","startHours":15.895387163459127,"endHours":16.895387163459127,"planetary_lord":"Moon"},{"name":"Hora 12","start":"16:54","end":"17:54","startHours":16.895387163459127,"endHours":17.895387163459127,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"17:54","end":"18:54","startHours":17.895387163459127,"endHours":18.895387163459127,"planetary_lord":"Venus"},{"name":"Hora 14","start":"18:54","end":"19:54","startHours":18.895387163459127,"endHours":19.895387163459127,"planetary_lord":"Sun"},{"name":"Hora 15","start":"19:54","end":"20:54","startHours":19.895387163459127,"endHours":20.895387163459127,"planetary_lord":"Mars"},{"name":"Hora 16","start":"20:54","end":"21:54","startHours":20.895387163459127,"endHours":21.895387163459127,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"21:54","end":"22:54","startHours":21.895387163459127,"endHours":22.895387163459127,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"22:54","end":"23:54","startHours":22.895387163459127,"endHours":23.895387163459127,"planetary_lord":"Moon"},{"name":"Hora 19","start":"23:54","end":"00:54","startHours":23.895387163459127,"endHours":24.895387163459127,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"00:54","end":"01:54","startHours":24.895387163459127,"endHours":25.895387163459127,"planetary_lord":"Venus"},{"name":"Hora 21","start":"01:54","end":"02:54","startHours":25.895387163459127,"endHours":26.895387163459127,"planetary_lord":"Sun"},{"name":"Hora 22","start":"02:54","end":"03:54","startHours":26.895387163459127,"endHours":27.895387163459127,"planetary_lord":"Mars"},{"name":"Hora 23","start":"03:54","end":"04:54","startHours":27.895387163459127,"endHours":28.895387163459127,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"04:54","end":"05:54","startHours":28.895387163459127,"endHours":29.895387163459127,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Dhvānkṣa","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":8.581714153658318,"eotMinutes":-0.7698108297043191,"ayanamsa":22.6695}},"calendars":{"vikram_samvat":1972,"vikram_samvatsara":"Vibhava","saka_samvat":1837,"saka_samvatsara":"Rākṣasa","bengali_samvat":1322,"malayalam_era":1091,"nanakshahi_year":446,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","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":"Vaiśākha Kṛṣṇa Caturdaśī · Vikram 1972 Vibhava · Śaka 1837 Rākṣasa"},"festivals":[{"id":"mesha-sankranti","name":"Meṣa Saṅkrānti (Vaiśākhī / Vishu / Pohelā Boishākh / Bihu)","name_sanskrit":"मेष सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aries; solar new year. Regional: Vaiśākhī (Punjab) · Vishu (Kerala) · Pohelā Boishākh (Bengal) · Bihu (Assam) · Tamil Puthāṇḍu.","vrata":false,"detection":{"sun_rashi_ingress":"Meṣa"},"precedence":1},{"id":"baisakhi","name":"Baisakhi (Vaiśākhī)","name_sanskrit":"वैशाखी","tradition":"Regional","associated_deity":"Sūrya + Khalsa Pantha (Sikh)","significance":"Punjab New Year + Sikh Khalsa founding day.","vrata":false,"detection":{"sun_rashi_ingress":"Meṣa"},"precedence":2},{"id":"masika-shivaratri","name":"Māsika Śivarātri","name_sanskrit":"मासिक शिवरात्रि","tradition":"Shaiva","associated_deity":"Śiva","significance":"Monthly Śiva observance.","vrata":true,"detection":{"tithi_number":29,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — 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 April 13, 1915 CE · Ṛṣikeśa · Vidhyamitra","description":"April 13, 1915 CE for Ṛṣikeśa: Kṛṣṇa Caturdaśī, sūryodaya 05:54, sūryāsta 18:42.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1915-04-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1915-04-13","sa":"https://sa.vidhyamitra.com/city/rishikesh/1915-04-13","hi":"https://hi.vidhyamitra.com/city/rishikesh/1915-04-13","x-default":"https://vidhyamitra.com/city/rishikesh/1915-04-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T21:08:04.685Z","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":"2026-05-31T21:08:04.685Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T21:08:04.685Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}