Ruling · Tila Caturthī · 2086

Friday 18 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 447 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two evenings

One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.

Evening of Friday 18 January

Taken. The only evening Caturthī reaches.

17:23 sunsetpradoṣa ends 19:17
16:5917:2317:4718:1118:3518:5919:2319:47

113 of 113 minutes covered

Evening of Saturday 19 January

Caturthī is absent from pradoṣa. Not taken.

17:25 sunsetpradoṣa ends 19:18
17:0117:2517:4918:1318:3719:0119:2519:49

0 of 113 minutes covered

Caturthī presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 09:56 on Fri 18 Jan to 06:49 on Sat 19 Jan.

    2086-01-18T01:55:59Z → 2086-01-18T22:48:34Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:23–19:17 on the 18th, 17:25–19:18 on the 19th.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 113 of 113 minutes on the 18th and 0 of 113 on the 19th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 26848 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 2086: Friday 18 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 2086 falls on Friday 18 January. Caturthī runs from 09:56 on Fri 18 Jan to 06:49 on Sat 19 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2086/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 18 Jan
Ahargaṇa, classicalDisc centre, no refractionFri 18 Jan
compat-drikpanchangComparison profileFri 18 Jan
No institution has a recorded ruling for Baoding.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/tila-chaturthi · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Śukla · Caturthī
Kāla
Pradoṣa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 105

“S 4 Tila caturthi and Kunda caturthi (pradosavyapini), Varada caturthi (Bengal & Orissa), Ganesa caturthi, Ganesa jayanti (madhyahnavyapini purvaviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīSunset 18thCoveredSunset 19thCoveredRuled
Los Angeles17:56 → 14:4917:100 min17:110 min17 Jan
Chicago19:56 → 16:4916:490 min16:500 min17 Jan
Jersey City20:56 → 17:4916:5751 min16:590 min18 Jan
Port of Spain21:56 → 18:4918:0444 min18:050 min18 Jan
London01:56 → 22:4916:26124 min16:280 min18 Jan
Durban03:56 → 00:4919:0082 min18:590 min18 Jan
Dubai05:56 → 02:4917:53106 min17:540 min18 Jan
Delhi07:26 → 04:1917:49107 min17:500 min18 Jan
Kolkata07:26 → 04:1917:15104 min17:160 min18 Jan
Singapore09:56 → 06:4919:1796 min19:170 min18 Jan
Sydney12:56 → 09:4920:0880 min20:070 min18 Jan
Suva13:56 → 10:4918:4888 min18:480 min18 Jan
Profile · tradition
pac-rp@2026.1 · smarta
Rule
tila-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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