{"id":"vidhyamitra:city-day:bangkok:2026-12-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/bangkok/2026-12-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2026-12-18","date_display":"December 18, 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":"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":2026,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461392.770833,"kali_year":5128,"ahargana":1872927.2708,"sun":{"sidereal_longitude":241.4548,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":344.6627,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":103.2079,"elapsed_within_tithi_degrees":7.2079},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4,"moon_longitude":344.6627,"elapsed_within_degrees":11.3293},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":226.1175},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":12,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2461392.770833,"ahargana":1872927.2708,"kali_year":5128,"ayanamsa_lahiri":24.2296,"grahas":{"sun":{"sidereal_longitude":241.88185299999998,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":341.340553,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false,"latitude":2.972},"mars":{"sidereal_longitude":132.66965300000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":233.28905299999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":122.53175299999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":195.766253,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":343.802953,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":303.3,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":123.3,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","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":2026,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461392.770833,"kali_year":5128,"ahargana":1872927.2708,"sun":{"sidereal_longitude":241.4548,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":344.6627,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":103.2079,"elapsed_within_tithi_degrees":7.2079},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4,"moon_longitude":344.6627,"elapsed_within_degrees":11.3293},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":226.1175},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.972,"elongation":103.208},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.972,"opposition_distance":76.792}},"eclipse_window_40days":[]},"city":{"slug":"bangkok","name":"Bangkok, Thailand","lat":13.7563,"lon":100.5018,"tz_offset_hours":7,"country":"TH","tier":"diaspora"},"tier2":{"city":{"slug":"bangkok","name":"Bangkok, Thailand","lat":13.7563,"lon":100.5018,"tz_offset_hours":7,"country":"TH","tier":"diaspora"},"sunriseLocal":"06:36","sunsetLocal":"17:55","solarNoonLocal":"12:15","dayLengthHours":11.315124925370396,"dayLengthDisplay":"11 Hours 18 Mins 54 Secs","nightLengthDisplay":"12 Hours 41 Mins 06 Secs","moonriseLocal":"12:48","moonsetLocal":"00:58","rahuKala":{"name":"Rāhu Kāla","start":"10:50","end":"12:15","startHours":10.83902726185968,"endHours":12.253417877530978,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:05","end":"16:30","startHours":15.082199108873578,"endHours":16.496589724544876,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:01","end":"09:25","startHours":8.01024603051708,"endHours":9.42463664618838,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:14","end":"09:37","startHours":9.23605123076554,"endHours":9.61322206161122,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:04","end":"07:22","startHours":7.067318953402881,"endHours":7.369055618079425,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:53","end":"12:38","startHours":11.876247046685299,"endHours":12.630588708376658,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:05","end":"05:50","startHours":5.087172091463062,"endHours":5.8415137531544215,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:39","end":"06:36","startHours":5.6529283377315815,"endHours":6.595855414845781,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:08","end":"14:54","startHours":14.13927203175938,"endHours":14.893613693450739,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:43","end":"18:07","startHours":17.710980340216178,"endHours":18.110980340216177,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:55","end":"18:23","startHours":17.910980340216177,"endHours":18.382443878773277,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:40","end":"19:25","startHours":17.660980340216177,"endHours":19.410980340216177,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:53","end":"00:38","startHours":23.876247046685297,"endHours":24.63058870837666,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:36","end":"08:01","startHours":6.595855414845781,"endHours":8.01024603051708,"quality":"neutral"},{"name":"Labha","start":"08:01","end":"09:25","startHours":8.01024603051708,"endHours":9.42463664618838,"quality":"auspicious"},{"name":"Amṛta","start":"09:25","end":"10:50","startHours":9.42463664618838,"endHours":10.83902726185968,"quality":"auspicious"},{"name":"Kāla","start":"10:50","end":"12:15","startHours":10.83902726185968,"endHours":12.253417877530978,"quality":"inauspicious"},{"name":"Śubha","start":"12:15","end":"13:40","startHours":12.253417877530978,"endHours":13.66780849320228,"quality":"auspicious"},{"name":"Roga","start":"13:40","end":"15:05","startHours":13.66780849320228,"endHours":15.082199108873578,"quality":"inauspicious"},{"name":"Udveg","start":"15:05","end":"16:30","startHours":15.082199108873578,"endHours":16.496589724544876,"quality":"inauspicious"},{"name":"Chala","start":"16:30","end":"17:55","startHours":16.496589724544876,"endHours":17.910980340216177,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:55","end":"19:30","startHours":17.910980340216177,"endHours":19.49658972454488,"quality":"inauspicious"},{"name":"Udveg","start":"19:30","end":"21:05","startHours":19.49658972454488,"endHours":21.082199108873578,"quality":"inauspicious"},{"name":"Chala","start":"21:05","end":"22:40","startHours":21.082199108873578,"endHours":22.66780849320228,"quality":"neutral"},{"name":"Labha","start":"22:40","end":"00:15","startHours":22.66780849320228,"endHours":24.25341787753098,"quality":"auspicious"},{"name":"Amṛta","start":"00:15","end":"01:50","startHours":24.25341787753098,"endHours":25.83902726185968,"quality":"auspicious"},{"name":"Kāla","start":"01:50","end":"03:25","startHours":25.83902726185968,"endHours":27.424636646188382,"quality":"inauspicious"},{"name":"Śubha","start":"03:25","end":"05:01","startHours":27.424636646188382,"endHours":29.01024603051708,"quality":"auspicious"},{"name":"Roga","start":"05:01","end":"06:36","startHours":29.01024603051708,"endHours":30.59585541484578,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:36","end":"07:36","startHours":6.595855414845781,"endHours":7.595855414845781,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:36","end":"08:36","startHours":7.595855414845781,"endHours":8.595855414845781,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:36","end":"09:36","startHours":8.595855414845781,"endHours":9.595855414845781,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:36","end":"10:36","startHours":9.595855414845781,"endHours":10.595855414845781,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:36","end":"11:36","startHours":10.595855414845781,"endHours":11.595855414845781,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:36","end":"12:36","startHours":11.595855414845781,"endHours":12.595855414845781,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:36","end":"13:36","startHours":12.595855414845781,"endHours":13.595855414845781,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:36","end":"14:36","startHours":13.595855414845781,"endHours":14.595855414845781,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:36","end":"15:36","startHours":14.595855414845781,"endHours":15.595855414845781,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:36","end":"16:36","startHours":15.595855414845781,"endHours":16.59585541484578,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:36","end":"17:36","startHours":16.59585541484578,"endHours":17.59585541484578,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:36","end":"18:36","startHours":17.59585541484578,"endHours":18.59585541484578,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:36","end":"19:36","startHours":18.59585541484578,"endHours":19.59585541484578,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:36","end":"20:36","startHours":19.59585541484578,"endHours":20.59585541484578,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:36","end":"21:36","startHours":20.59585541484578,"endHours":21.59585541484578,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:36","end":"22:36","startHours":21.59585541484578,"endHours":22.59585541484578,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:36","end":"23:36","startHours":22.59585541484578,"endHours":23.59585541484578,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:36","end":"00:36","startHours":23.59585541484578,"endHours":24.59585541484578,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:36","end":"01:36","startHours":24.59585541484578,"endHours":25.59585541484578,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:36","end":"02:36","startHours":25.59585541484578,"endHours":26.59585541484578,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:36","end":"03:36","startHours":26.59585541484578,"endHours":27.59585541484578,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:36","end":"04:36","startHours":27.59585541484578,"endHours":28.59585541484578,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:36","end":"05:36","startHours":28.59585541484578,"endHours":29.59585541484578,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:36","end":"06:36","startHours":29.59585541484578,"endHours":30.59585541484578,"planetary_lord":"Mars"}],"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":"West (Paścim)","chandraVasa":"South-West","rahuVasa":"South-East","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.37933294535893,"eotMinutes":2.787727348141232,"ayanamsa":24.2296}},"calendars":{"vikram_samvat":2083,"vikram_samvatsara":"Siddhārthī","saka_samvat":1948,"saka_samvatsara":"Parābhava","bengali_samvat":1433,"malayalam_era":1202,"nanakshahi_year":557,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Navamī · Vikram 2083 Siddhārthī · Śaka 1948 Parābhava"},"festivals":[],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"bangkok"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga December 18, 2026 CE · Bangkok, Thailand · Vidhyamitra","description":"December 18, 2026 CE for Bangkok, Thailand: Śukla Navamī, sūryodaya 06:36, sūryāsta 17:55.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/bangkok/2026-12-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/bangkok/2026-12-18","sa":"https://sa.vidhyamitra.com/city/bangkok/2026-12-18","hi":"https://hi.vidhyamitra.com/city/bangkok/2026-12-18","x-default":"https://vidhyamitra.com/city/bangkok/2026-12-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-07-25T00:21:28.961Z","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":"2026-07-25T00:21:28.961Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-07-25T00:21:28.961Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"},"reader_local_antaryami":{"reader_geography":"Every reader enters from their own kṣetra anywhere on Bhūmi; no founder-city is the universal center.","purna_chain":["Goloka/Vraja Rādhā-Krishna","Vaikuṇṭha Lakṣmī-Nārāyaṇa","Mahāviṣṇu/Kāraṇodakaśāyī Viṣṇu","Garbhodakaśāyī Viṣṇu","Brahmā","Kṣīrodaka Paramātmā/Antaryāmī (Kṣīrodakaśāyī Viṣṇu)","Bhūmi","reader's own kṣetra anywhere on Bhūmi","exact reading kṣetra","Divyāṁśa-bhakta","chitta/vāṇī/aṅgulī","keyboard-silicon-pathways","Vidhyāmitra substrate","reader/seer","Krishna"],"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"}}}