Ruling · Tila Caturthī · 1964

Saturday 18 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 638 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 17 January

Caturthī is absent from pradoṣa. Not taken.

17:21 sunsetpradoṣa ends 19:15
16:5717:2117:4518:0918:3318:5719:2119:45

0 of 114 minutes covered

Evening of Saturday 18 January

Taken. The only evening Caturthī reaches.

17:22 sunsetpradoṣa ends 19:16
16:5817:2217:4618:1018:3418:5819:2219:46

114 of 114 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 06:17 on Sat 18 Jan to 05:54 on Sun 19 Jan.

    1964-01-17T22:16:57Z → 1964-01-18T21:53:42Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:21–19:15 on the 17th, 17:22–19:16 on the 18th.

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

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 0 of 114 minutes on the 17th and 114 of 114 on the 18th.

    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 38288 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1964: Saturday 18 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1964 falls on Saturday 18 January. Caturthī runs from 06:17 on Sat 18 Jan to 05:54 on Sun 19 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1964/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 18 Jan
Ahargaṇa, classicalDisc centre, no refractionSat 18 Jan
compat-drikpanchangComparison profileSat 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 17thCoveredSunset 18thCoveredRuled
Los Angeles14:17 → 13:5417:08111 min17:090 min17 Jan
Chicago16:17 → 15:5416:46116 min16:470 min17 Jan
Jersey City17:17 → 16:5416:5593 min16:560 min17 Jan
Port of Spain18:17 → 17:5418:0386 min18:040 min17 Jan
London22:17 → 21:5416:220 min16:24124 min18 Jan
Durban00:17 → 23:5419:000 min19:0082 min18 Jan
Dubai02:17 → 01:5417:510 min17:52106 min18 Jan
Delhi03:47 → 03:2417:470 min17:48108 min18 Jan
Kolkata03:47 → 03:2417:140 min17:14105 min18 Jan
Singapore05:47 → 05:2418:460 min18:4696 min18 Jan
Sydney08:17 → 07:5419:090 min19:0879 min18 Jan
Suva10:17 → 09:5418:480 min18:4888 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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