Ruling · Tila Caturthī · 1966

Tuesday 25 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 463 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 Tuesday 25 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 Wednesday 26 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 07:18 on Tue 25 Jan to 09:48 on Wed 26 Jan.

    1966-01-24T23:18:04Z → 1966-01-26T01:48:05Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:30–19:22 on the 25th, 17:31–19:23 on the 26th.

    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 25th and 0 of 112 on the 26th.

    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 27802 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1966: Tuesday 25 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1966 falls on Tuesday 25 January. Caturthī runs from 07:18 on Tue 25 Jan to 09:48 on Wed 26 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1966/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 25 Jan
Ahargaṇa, classicalDisc centre, no refractionTue 25 Jan
compat-drikpanchangComparison profileTue 25 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 26thCoveredRuled
Los Angeles15:18 → 17:4817:15109 min17:170 min24 Jan
Chicago17:18 → 19:4816:5591 min16:580 min25 Jan
Jersey City18:18 → 20:4817:0339 min17:060 min25 Jan
Port of Spain19:18 → 21:4818:0728 min18:080 min25 Jan
London23:18 → 01:4816:350 min16:380 min25 Jan
Durban01:18 → 03:4818:580 min18:570 min25 Jan
Dubai03:18 → 05:4817:570 min17:580 min25 Jan
Delhi04:48 → 07:1817:530 min17:550 min25 Jan
Kolkata04:48 → 07:1817:190 min17:200 min25 Jan
Singapore06:48 → 09:1818:480 min18:490 min25 Jan
Sydney09:18 → 11:4819:060 min19:050 min25 Jan
Suva11:18 → 13:4818:480 min18:480 min25 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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