{"id":"vidhyamitra:day:1916-09-25:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1916-09-25","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1916-09-25","date_display":"September 25, 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":9,"day":25,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2421131.770833,"kali_year":5018,"ahargana":1832666.2708,"sun":{"sidereal_longitude":158.3982,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":131.1541,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":332.7559,"elapsed_within_tithi_degrees":8.7559},"nakshatra":{"number":10,"name":"Maghā","pada":4,"moon_longitude":131.1541,"elapsed_within_degrees":11.1541},"yoga":{"number":22,"name":"Sādhya","sum_longitude":289.5522},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":9,"day":25,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2421131.770833,"ahargana":1832666.2708,"kali_year":5018,"ayanamsa_lahiri":22.6898,"grahas":{"sun":{"sidereal_longitude":158.93941900000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":132.61041899999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false,"latitude":-2.5556},"mars":{"sidereal_longitude":199.485319,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":179.18331899999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":11.780418999999995,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":114.53701899999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":96.427119,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":276.5216,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":96.5216,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"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":9,"day":25,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2421131.770833,"kali_year":5018,"ahargana":1832666.2708,"sun":{"sidereal_longitude":158.3982,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":131.1541,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":332.7559,"elapsed_within_tithi_degrees":8.7559},"nakshatra":{"number":10,"name":"Maghā","pada":4,"moon_longitude":131.1541,"elapsed_within_degrees":11.1541},"yoga":{"number":22,"name":"Sādhya","sum_longitude":289.5522},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.556,"elongation":27.244},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.556,"opposition_distance":152.756}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":1973,"vikram_samvatsara":"Śukla","saka_samvat":1838,"saka_samvatsara":"Nala","bengali_samvat":1323,"malayalam_era":1092,"nanakshahi_year":447,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Kṛṣṇa Trayodaśī · Vikram 1973 Śukla · Śaka 1838 Nala"},"festivals":[{"id":"kanya-sankranti","name":"Kanyā Saṅkrānti (Mahālaya begins)","name_sanskrit":"कन्या सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Virgo; Mahālaya / Pitṛ-Pakṣa solar marker.","vrata":false,"detection":{"sun_rashi":"Kanyā"},"precedence":4},{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"valid_from":"1916-09-25T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga September 25, 1916 CE · Vidhyamitra","description":"Vedic pañchāṅga for September 25, 1916 CE: Kṛṣṇa Trayodaśī · Maghā.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/1916-09-25","hreflang_alternates":{"en":"https://vidhyamitra.com/day/1916-09-25","sa":"https://sa.vidhyamitra.com/day/1916-09-25","hi":"https://hi.vidhyamitra.com/day/1916-09-25","x-default":"https://vidhyamitra.com/day/1916-09-25"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T07:25:11.665Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-14T07:25:11.665Z","pillar_versions":{"BOB-History":"Pūrṇa"}}}