{"id":"vidhyamitra:city-day:thane:2181-04-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/thane/2181-04-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2181-04-17","date_display":"April 17, 2181 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":2181,"month":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2517760.770833,"kali_year":5282,"ahargana":1929295.2708,"sun":{"sidereal_longitude":0.8416,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":38.1241,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":37.2825,"elapsed_within_tithi_degrees":1.2825},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4,"moon_longitude":38.1241,"elapsed_within_degrees":11.4575},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":38.9657},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"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":2181,"month":4,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2517760.770833,"ahargana":1929295.2708,"kali_year":5282,"ayanamsa_lahiri":26.3855,"grahas":{"sun":{"sidereal_longitude":1.1339810000000057,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":35.195880999999986,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false,"latitude":-1.6457},"mars":{"sidereal_longitude":75.713481,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":15.141580999999974,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":103.92868099999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"venus":{"sidereal_longitude":16.11788100000001,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":76.42758100000003,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":196.6521,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":16.6521,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","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":2181,"month":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2517760.770833,"kali_year":5282,"ahargana":1929295.2708,"sun":{"sidereal_longitude":0.8416,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":38.1241,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":37.2825,"elapsed_within_tithi_degrees":1.2825},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4,"moon_longitude":38.1241,"elapsed_within_degrees":11.4575},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":38.9657},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.646,"elongation":37.283},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.646,"opposition_distance":142.717}},"eclipse_window_40days":[{"offset_days":-3,"type":"solar","occurs":true,"moon_latitude":1.281,"elongation":2.34}]},"city":{"slug":"thane","name":"Thane, Maharashtra","lat":19.2183,"lon":72.9781,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"thane","name":"Thane, Maharashtra","lat":19.2183,"lon":72.9781,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"sunriseLocal":"06:19","sunsetLocal":"18:56","solarNoonLocal":"12:38","dayLengthHours":12.618207837448098,"dayLengthDisplay":"12 Hours 37 Mins 06 Secs","nightLengthDisplay":"11 Hours 22 Mins 54 Secs","moonriseLocal":"08:21","moonsetLocal":"21:27","rahuKala":{"name":"Rāhu Kāla","start":"15:47","end":"17:22","startHours":15.784944476366526,"endHours":17.362220456047538,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:29","end":"11:03","startHours":9.475840557642476,"endHours":11.05311653732349,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:38","end":"14:12","startHours":12.630392517004502,"endHours":14.207668496685514,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:16","end":"09:41","startHours":9.265537093685008,"endHours":9.686144021599944,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:51","end":"07:11","startHours":6.847047258174123,"endHours":7.183532800506072,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:13","end":"13:03","startHours":12.209785589089565,"endHours":13.050999444919439,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:38","end":"05:29","startHours":4.638860886620705,"endHours":5.4800747424505785,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:16","end":"06:19","startHours":5.26977127849311,"endHours":6.321288598280452,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:44","end":"15:34","startHours":14.733427156579184,"endHours":15.574641012409057,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:44","end":"19:08","startHours":18.73949643572855,"endHours":19.13949643572855,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:56","end":"19:28","startHours":18.93949643572855,"endHours":19.465255095622222,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:41","end":"20:26","startHours":18.68949643572855,"endHours":20.43949643572855,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:13","end":"01:03","startHours":24.209785589089567,"endHours":25.050999444919437,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:19","end":"07:54","startHours":6.321288598280452,"endHours":7.898564577961464,"quality":"inauspicious"},{"name":"Udveg","start":"07:54","end":"09:29","startHours":7.898564577961464,"endHours":9.475840557642476,"quality":"inauspicious"},{"name":"Chala","start":"09:29","end":"11:03","startHours":9.475840557642476,"endHours":11.05311653732349,"quality":"neutral"},{"name":"Labha","start":"11:03","end":"12:38","startHours":11.05311653732349,"endHours":12.630392517004502,"quality":"auspicious"},{"name":"Amṛta","start":"12:38","end":"14:12","startHours":12.630392517004502,"endHours":14.207668496685514,"quality":"auspicious"},{"name":"Kāla","start":"14:12","end":"15:47","startHours":14.207668496685514,"endHours":15.784944476366526,"quality":"inauspicious"},{"name":"Śubha","start":"15:47","end":"17:22","startHours":15.784944476366526,"endHours":17.362220456047538,"quality":"auspicious"},{"name":"Roga","start":"17:22","end":"18:56","startHours":17.362220456047538,"endHours":18.93949643572855,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:56","end":"20:22","startHours":18.93949643572855,"endHours":20.362220456047538,"quality":"inauspicious"},{"name":"Śubha","start":"20:22","end":"21:47","startHours":20.362220456047538,"endHours":21.784944476366526,"quality":"auspicious"},{"name":"Roga","start":"21:47","end":"23:12","startHours":21.784944476366526,"endHours":23.207668496685514,"quality":"inauspicious"},{"name":"Udveg","start":"23:12","end":"00:38","startHours":23.207668496685514,"endHours":24.630392517004502,"quality":"inauspicious"},{"name":"Chala","start":"00:38","end":"02:03","startHours":24.630392517004502,"endHours":26.05311653732349,"quality":"neutral"},{"name":"Labha","start":"02:03","end":"03:29","startHours":26.05311653732349,"endHours":27.475840557642478,"quality":"auspicious"},{"name":"Amṛta","start":"03:29","end":"04:54","startHours":27.475840557642478,"endHours":28.898564577961466,"quality":"auspicious"},{"name":"Kāla","start":"04:54","end":"06:19","startHours":28.898564577961466,"endHours":30.321288598280454,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:19","end":"07:19","startHours":6.321288598280452,"endHours":7.321288598280452,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:19","end":"08:19","startHours":7.321288598280452,"endHours":8.321288598280452,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:19","end":"09:19","startHours":8.321288598280452,"endHours":9.321288598280452,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:19","end":"10:19","startHours":9.321288598280452,"endHours":10.321288598280452,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:19","end":"11:19","startHours":10.321288598280452,"endHours":11.321288598280452,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:19","end":"12:19","startHours":11.321288598280452,"endHours":12.321288598280452,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:19","end":"13:19","startHours":12.321288598280452,"endHours":13.321288598280452,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:19","end":"14:19","startHours":13.321288598280452,"endHours":14.321288598280452,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:19","end":"15:19","startHours":14.321288598280452,"endHours":15.321288598280452,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:19","end":"16:19","startHours":15.321288598280452,"endHours":16.321288598280454,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:19","end":"17:19","startHours":16.321288598280454,"endHours":17.321288598280454,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:19","end":"18:19","startHours":17.321288598280454,"endHours":18.321288598280454,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:19","end":"19:19","startHours":18.321288598280454,"endHours":19.321288598280454,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:19","end":"20:19","startHours":19.321288598280454,"endHours":20.321288598280454,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:19","end":"21:19","startHours":20.321288598280454,"endHours":21.321288598280454,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:19","end":"22:19","startHours":21.321288598280454,"endHours":22.321288598280454,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:19","end":"23:19","startHours":22.321288598280454,"endHours":23.321288598280454,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:19","end":"00:19","startHours":23.321288598280454,"endHours":24.321288598280454,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:19","end":"01:19","startHours":24.321288598280454,"endHours":25.321288598280454,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:19","end":"02:19","startHours":25.321288598280454,"endHours":26.321288598280454,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:19","end":"03:19","startHours":26.321288598280454,"endHours":27.321288598280454,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:19","end":"04:19","startHours":27.321288598280454,"endHours":28.321288598280454,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:19","end":"05:19","startHours":28.321288598280454,"endHours":29.321288598280454,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:19","end":"06:19","startHours":29.321288598280454,"endHours":30.321288598280454,"planetary_lord":"Saturn"}],"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":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"North (Uttara)","chandraVasa":"South-East","rahuVasa":"North","anandadiYoga":{"name":"Chatra","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":10.589566381807808,"eotMinutes":0.2640489797298191,"ayanamsa":26.3855}},"calendars":{"vikram_samvat":2238,"vikram_samvatsara":"Jaya","saka_samvat":2103,"saka_samvatsara":"Vṛṣa","bengali_samvat":1588,"malayalam_era":1357,"nanakshahi_year":712,"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 Caturthī · Vikram 2238 Jaya · Śaka 2103 Vṛṣa"},"festivals":[{"id":"angarika-chaturthi","name":"Aṅgāraka Caturthī (Tuesday Caturthī)","name_sanskrit":"अङ्गारक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa + Maṅgala","significance":"Tuesday-Caturthī (rare); supremely auspicious for Maṅgala-doṣa-nivāraṇa.","vrata":true,"detection":{"any_of":[{"tithi_number":4,"vara_name":"Maṅgalavāra (Tuesday)"},{"tithi_number":19,"vara_name":"Maṅgalavāra (Tuesday)"}]},"precedence":3},{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"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":[{"historical_date":"-3137-10-04","event":"Mahābhārata Day 1 (Bhagavad Gītā delivered)","chart_id":"krishna","shared_marker":"same Kṛttikā","url":"/day/-3137-10-04","relevance":0.5},{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Kṛttikā","url":"/day/-3137-12-25","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"thane"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 17, 2181 CE · Thane, Maharashtra · Vidhyamitra","description":"April 17, 2181 CE for Thane, Maharashtra: Śukla Caturthī, sūryodaya 06:19, sūryāsta 18:56.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/thane/2181-04-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/thane/2181-04-17","sa":"https://sa.vidhyamitra.com/city/thane/2181-04-17","hi":"https://hi.vidhyamitra.com/city/thane/2181-04-17","x-default":"https://vidhyamitra.com/city/thane/2181-04-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T23:00:20.547Z","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":"2026-05-31T23:00:20.547Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T23:00:20.547Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}