Ruling · Tila Caturthī · 1985

Thursday 24 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 177 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 Thursday 24 January

Taken. The only evening Caturthī reaches.

17:30 sunsetpradoṣa ends 19:22
17:0617:3017:5418:1818:4219:0619:3019:54

112 of 112 minutes covered

Evening of Friday 25 January

Caturthī is absent from pradoṣa. Not taken.

17:31 sunsetpradoṣa ends 19:23
17:0717:3117:5518:1918:4319:0719:3119:55

0 of 112 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 12:43 on Thu 24 Jan to 14:34 on Fri 25 Jan.

    1985-01-24T04:42:55Z → 1985-01-25T06:34:06Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:30–19:22 on the 24th, 17:31–19:23 on the 25th.

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

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 112 of 112 minutes on the 24th and 0 of 112 on the 25th.

    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 10597 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1985: Thursday 24 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1985 falls on Thursday 24 January. Caturthī runs from 12:43 on Thu 24 Jan to 14:34 on Fri 25 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1985/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 24 Jan
Ahargaṇa, classicalDisc centre, no refractionThu 24 Jan
compat-drikpanchangComparison profileThu 24 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 24thCoveredSunset 25thCoveredRuled
Los Angeles20:43 → 22:3417:15109 min17:160 min24 Jan
Chicago22:43 → 00:3416:56114 min16:570 min24 Jan
Jersey City23:43 → 01:3417:04113 min17:050 min24 Jan
Port of Spain00:43 → 02:3418:0799 min18:070 min24 Jan
London04:43 → 06:3416:35122 min16:370 min24 Jan
Durban06:43 → 08:3418:5883 min18:570 min24 Jan
Dubai08:43 → 10:3417:57105 min17:580 min24 Jan
Delhi10:13 → 12:0417:53107 min17:540 min24 Jan
Kolkata10:13 → 12:0417:19104 min17:200 min24 Jan
Singapore12:43 → 14:3419:1896 min19:190 min24 Jan
Sydney15:43 → 17:3420:0581 min20:050 min24 Jan
Suva16:43 → 18:3418:4888 min18:480 min24 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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