Ruling · Tila Caturthī · 1909

Monday 25 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 25 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 Sunday 24 January

Caturthī is absent from pradoṣa. Not taken.

17:29 sunsetpradoṣa ends 19:21
17:0517:2917:5318:1718:4119:0519:2919:53

0 of 112 minutes covered

Evening of Monday 25 January

Taken. The only evening Caturthī reaches.

17:30 sunsetpradoṣa ends 19:22
Caturthī ends 18:57:28
17:0617:3017:5418:1818:4219:0619:3019:54

87 of 112 minutes covered, the first 87

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 22:09 on Sun 24 Jan to 18:57 on Mon 25 Jan.

    1909-01-24T14:09:13Z → 1909-01-25T10:57:28Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:29–19:21 on the 24th, 17:30–19:22 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 0 of 112 minutes on the 24th and 87 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 1488 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1909: Monday 25 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1909 falls on Monday 25 January. Caturthī runs from 22:09 on Sun 24 Jan to 18:57 on Mon 25 Jan and covers 87 of 112 minutes of pradoṣa that evening.

ahargana.org/baoding/festivals/1909/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 25 Jan
Ahargaṇa, classicalDisc centre, no refractionMon 25 Jan
compat-drikpanchangComparison profileMon 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 25thCoveredRuled
Los Angeles06:09 → 02:5717:15109 min17:160 min24 Jan
Chicago08:09 → 04:5716:55114 min16:560 min24 Jan
Jersey City09:09 → 05:5717:03113 min17:050 min24 Jan
Port of Spain10:09 → 06:5718:0799 min18:070 min24 Jan
London14:09 → 10:5716:34122 min16:360 min24 Jan
Durban16:09 → 12:5718:5883 min18:580 min24 Jan
Dubai17:50 → 14:3817:3893 min17:390 min24 Jan
Delhi19:39 → 16:2717:531 min17:540 min24 Jan
Kolkata19:39 → 16:2717:190 min17:200 min24 Jan
Singapore21:09 → 17:5718:180 min18:190 min24 Jan
Sydney00:09 → 20:5719:060 min19:0581 min25 Jan
Suva02:04 → 22:5218:430 min18:4388 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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