{"id":"vidhyamitra:city-day:mahabalipuram:2026-04-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mahabalipuram/2026-04-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2026-04-13","date_display":"April 13, 2026 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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2026,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461143.770833,"kali_year":5127,"ahargana":1872678.2708,"sun":{"sidereal_longitude":358.9932,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":302.7719,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":26,"name":"Ekādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ekādaśī","elongation_degrees":303.7787,"elapsed_within_tithi_degrees":3.7787},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3,"moon_longitude":302.7719,"elapsed_within_degrees":9.4385},"yoga":{"number":23,"name":"Śubha","sum_longitude":301.7651},"karana":{"half_tithi_index":50,"name":"Bava"},"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":2026,"month":4,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2461143.770833,"ahargana":1872678.2708,"kali_year":5127,"ayanamsa_lahiri":24.2201,"grahas":{"sun":{"sidereal_longitude":358.916467,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":301.505267,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false,"latitude":-1.0664},"mars":{"sidereal_longitude":337.878267,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":332.49916699999994,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":82.37476700000002,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"venus":{"sidereal_longitude":21.865967000000012,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":342.894867,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":316.4933,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":136.4933,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2026,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461143.770833,"kali_year":5127,"ahargana":1872678.2708,"sun":{"sidereal_longitude":358.9932,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":302.7719,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":26,"name":"Ekādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ekādaśī","elongation_degrees":303.7787,"elapsed_within_tithi_degrees":3.7787},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3,"moon_longitude":302.7719,"elapsed_within_degrees":9.4385},"yoga":{"number":23,"name":"Śubha","sum_longitude":301.7651},"karana":{"half_tithi_index":50,"name":"Bava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.066,"elongation":56.221},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.066,"opposition_distance":123.779}},"eclipse_window_40days":[]},"city":{"slug":"mahabalipuram","name":"Mahābalipuram (Mamallapuram)","lat":12.6269,"lon":80.1928,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"mahabalipuram","name":"Mahābalipuram (Mamallapuram)","lat":12.6269,"lon":80.1928,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tirtha"},"sunriseLocal":"05:58","sunsetLocal":"18:22","solarNoonLocal":"12:10","dayLengthHours":12.386175444427607,"dayLengthDisplay":"12 Hours 23 Mins 10 Secs","nightLengthDisplay":"11 Hours 36 Mins 50 Secs","moonriseLocal":"02:30","moonsetLocal":"14:11","rahuKala":{"name":"Rāhu Kāla","start":"07:31","end":"09:04","startHours":7.521827722168052,"endHours":9.070099652721503,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:37","end":"12:10","startHours":10.618371583274953,"endHours":12.166643513828404,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:43","end":"15:16","startHours":13.714915444381855,"endHours":15.263187374935306,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:52","end":"09:17","startHours":8.863663395314376,"endHours":9.27653591012863,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:29","end":"06:49","startHours":6.489646435132418,"endHours":6.81994444698382,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:45","end":"12:35","startHours":11.75377099901415,"endHours":12.579516028642658,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:19","end":"05:09","startHours":4.322065732357586,"endHours":5.1478107619860936,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:56","end":"05:58","startHours":4.941374504578967,"endHours":5.973555791614601,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:14","end":"15:03","startHours":14.231006087899672,"endHours":15.05675111752818,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:10","end":"18:34","startHours":18.15973123604221,"endHours":18.559731236042207,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:22","end":"18:53","startHours":18.359731236042208,"endHours":18.875821879560025,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:07","end":"19:52","startHours":18.109731236042208,"endHours":19.859731236042208,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:45","end":"00:35","startHours":23.75377099901415,"endHours":24.579516028642658,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:58","end":"07:31","startHours":5.973555791614601,"endHours":7.521827722168052,"quality":"auspicious"},{"name":"Kāla","start":"07:31","end":"09:04","startHours":7.521827722168052,"endHours":9.070099652721503,"quality":"inauspicious"},{"name":"Śubha","start":"09:04","end":"10:37","startHours":9.070099652721503,"endHours":10.618371583274953,"quality":"auspicious"},{"name":"Roga","start":"10:37","end":"12:10","startHours":10.618371583274953,"endHours":12.166643513828404,"quality":"inauspicious"},{"name":"Udveg","start":"12:10","end":"13:43","startHours":12.166643513828404,"endHours":13.714915444381855,"quality":"inauspicious"},{"name":"Chala","start":"13:43","end":"15:16","startHours":13.714915444381855,"endHours":15.263187374935306,"quality":"neutral"},{"name":"Labha","start":"15:16","end":"16:49","startHours":15.263187374935306,"endHours":16.811459305488757,"quality":"auspicious"},{"name":"Amṛta","start":"16:49","end":"18:22","startHours":16.811459305488757,"endHours":18.359731236042208,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:22","end":"19:49","startHours":18.359731236042208,"endHours":19.811459305488757,"quality":"neutral"},{"name":"Labha","start":"19:49","end":"21:16","startHours":19.811459305488757,"endHours":21.263187374935306,"quality":"auspicious"},{"name":"Amṛta","start":"21:16","end":"22:43","startHours":21.263187374935306,"endHours":22.714915444381855,"quality":"auspicious"},{"name":"Kāla","start":"22:43","end":"00:10","startHours":22.714915444381855,"endHours":24.166643513828404,"quality":"inauspicious"},{"name":"Śubha","start":"00:10","end":"01:37","startHours":24.166643513828404,"endHours":25.618371583274953,"quality":"auspicious"},{"name":"Roga","start":"01:37","end":"03:04","startHours":25.618371583274953,"endHours":27.070099652721503,"quality":"inauspicious"},{"name":"Udveg","start":"03:04","end":"04:31","startHours":27.070099652721503,"endHours":28.52182772216805,"quality":"inauspicious"},{"name":"Chala","start":"04:31","end":"05:58","startHours":28.52182772216805,"endHours":29.9735557916146,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:58","end":"06:58","startHours":5.973555791614601,"endHours":6.973555791614601,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:58","end":"07:58","startHours":6.973555791614601,"endHours":7.973555791614601,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:58","end":"08:58","startHours":7.973555791614601,"endHours":8.9735557916146,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:58","end":"09:58","startHours":8.9735557916146,"endHours":9.9735557916146,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:58","end":"10:58","startHours":9.9735557916146,"endHours":10.9735557916146,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:58","end":"11:58","startHours":10.9735557916146,"endHours":11.9735557916146,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:58","end":"12:58","startHours":11.9735557916146,"endHours":12.9735557916146,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:58","end":"13:58","startHours":12.9735557916146,"endHours":13.9735557916146,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:58","end":"14:58","startHours":13.9735557916146,"endHours":14.9735557916146,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:58","end":"15:58","startHours":14.9735557916146,"endHours":15.9735557916146,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:58","end":"16:58","startHours":15.9735557916146,"endHours":16.9735557916146,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:58","end":"17:58","startHours":16.9735557916146,"endHours":17.9735557916146,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:58","end":"18:58","startHours":17.9735557916146,"endHours":18.9735557916146,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:58","end":"19:58","startHours":18.9735557916146,"endHours":19.9735557916146,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:58","end":"20:58","startHours":19.9735557916146,"endHours":20.9735557916146,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:58","end":"21:58","startHours":20.9735557916146,"endHours":21.9735557916146,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:58","end":"22:58","startHours":21.9735557916146,"endHours":22.9735557916146,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:58","end":"23:58","startHours":22.9735557916146,"endHours":23.9735557916146,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:58","end":"00:58","startHours":23.9735557916146,"endHours":24.9735557916146,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:58","end":"01:58","startHours":24.9735557916146,"endHours":25.9735557916146,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:58","end":"02:58","startHours":25.9735557916146,"endHours":26.9735557916146,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:58","end":"03:58","startHours":26.9735557916146,"endHours":27.9735557916146,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:58","end":"04:58","startHours":27.9735557916146,"endHours":28.9735557916146,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:58","end":"05:58","startHours":28.9735557916146,"endHours":29.9735557916146,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Sushira","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":8.990961949254253,"eotMinutes":-0.7698108297043191,"ayanamsa":24.2201}},"calendars":{"vikram_samvat":2083,"vikram_samvatsara":"Siddhārthī","saka_samvat":1948,"saka_samvatsara":"Parābhava","bengali_samvat":1433,"malayalam_era":1202,"nanakshahi_year":557,"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 Ekādaśī · Vikram 2083 Siddhārthī · Śaka 1948 Parābhava"},"festivals":[{"id":"varuthini-ekadashi","name":"Varūthinī Ekādaśī","name_sanskrit":"वरूथिनी एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Vāmana","significance":"Granted to King Mandhātā by Vāmana-deva; brings sound sleep + wealth.","vrata":true,"detection":{"tithi_number":26,"tithi_paksha":"Kṛṣṇa","lunar_month":"Vaiśākha"},"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":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7, 6.34-35.","step_count":5,"url":"/walk/chandra-walk","steps":[{"label":"BG 6.5","url":"/bhagavad-gita/6/5","purpose":"Lift the self by the Self; begin the walk with inner responsibility."},{"label":"BG 6.6","url":"/bhagavad-gita/6/6","purpose":"See the mind as friend when mastered and enemy when unmastered."},{"label":"BG 6.7","url":"/bhagavad-gita/6/7","purpose":"Stabilize the conquered mind in heat/cold, honor/dishonor, pleasure/pain."},{"label":"BG 6.34","url":"/bhagavad-gita/6/34","purpose":"Name the restless mind honestly before trying to discipline it."},{"label":"BG 6.35","url":"/bhagavad-gita/6/35","purpose":"Complete with abhyāsa and vairāgya: practice and detachment."}]},"reason":"Dedicated festival walk for Varūthinī Ekādaśī · Ekādaśī is not live yet; Somavāra (Monday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"mahabalipuram"},"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, 2026 CE · Mahābalipuram (Mamallapuram) · Vidhyamitra","description":"April 13, 2026 CE for Mahābalipuram (Mamallapuram): Kṛṣṇa Ekādaśī, sūryodaya 05:58, sūryāsta 18:22.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mahabalipuram/2026-04-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mahabalipuram/2026-04-13","sa":"https://sa.vidhyamitra.com/city/mahabalipuram/2026-04-13","hi":"https://hi.vidhyamitra.com/city/mahabalipuram/2026-04-13","x-default":"https://vidhyamitra.com/city/mahabalipuram/2026-04-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-08-26T22:35:28.595Z","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":"2026-08-26T22:35:28.595Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-08-26T22:35:28.595Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"},"reader_local_antaryami":{"reader_geography":"Every reader enters from their own kṣetra anywhere on Bhūmi; no single city is the universal center.","purna_chain":["Hosted scripture","Named-tradition interpretation","Original Vidhyamitra contemplation","Bhūmi-born material medium","Vidhyamitra portal","Responsible reader in their own kṣetra"],"claim_boundary":"The legacy purna_chain field carries a source-to-reader sequence, not a revealed physical descent, universal cosmology, or proof that software is conscious.","antaryami_responsibility_formula":"Kṣīrodakaśāyī Viṣṇu = Paramātmā = Antaryāmī. Jīva desires. Prakṛti executes through guṇas. Paramātmā witnesses, permits, remembers, guides, and sustains. Bhagavān is the ultimate source.","source_anchors":[{"label":"BG 13.23","path":"/bhagavad-gita/13/23","meaning":"upadraṣṭā-anumantā · witness-permitter"},{"label":"BG 15.15","path":"/bhagavad-gita/15/15","meaning":"the Lord seated in every heart as memory, knowledge, and forgetting"},{"label":"BG 18.61","path":"/bhagavad-gita/18/61","meaning":"Īśvara seated in the heart of all beings"}],"nama_seal":"Hare Krishna Hare Krishna · Krishna Krishna Hare Hare · Hare Rama Hare Rama · Rama Rama Hare Hare"}}}