Ruling · Tila Caturthī · 1997

Monday 10 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 327 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 Monday 10 February

Taken. The only evening Caturthī reaches.

17:49 sunsetpradoṣa ends 19:37
17:2517:4918:1318:3719:0119:2519:49

107 of 107 minutes covered

Evening of Tuesday 11 February

Caturthī is absent from pradoṣa. Not taken.

17:50 sunsetpradoṣa ends 19:38
17:2617:5018:1418:3819:0219:2619:50

0 of 107 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 12:23 on Mon 10 Feb to 09:34 on Tue 11 Feb.

    1997-02-10T04:22:41Z → 1997-02-11T01:34:02Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:49–19:37 on the 10th, 17:50–19:38 on the 11th.

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

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 107 of 107 minutes on the 10th and 0 of 107 on the 11th.

    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 19598 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1997: Monday 10 February.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1997 falls on Monday 10 February. Caturthī runs from 12:23 on Mon 10 Feb to 09:34 on Tue 11 Feb and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1997/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 10 Feb
Ahargaṇa, classicalDisc centre, no refractionMon 10 Feb
compat-drikpanchangComparison profileMon 10 Feb
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 10thCoveredSunset 11thCoveredRuled
Los Angeles20:23 → 17:3417:322 min17:330 min10 Feb
Chicago22:23 → 19:3417:17109 min17:190 min10 Feb
Jersey City23:23 → 20:3417:25108 min17:260 min10 Feb
Port of Spain00:23 → 21:3418:1398 min18:130 min10 Feb
London04:23 → 01:3417:06114 min17:080 min10 Feb
Durban06:23 → 03:3418:4786 min18:460 min10 Feb
Dubai08:23 → 05:3418:09102 min18:100 min10 Feb
Delhi09:53 → 07:0418:07103 min18:080 min10 Feb
Kolkata09:53 → 07:0417:30101 min17:310 min10 Feb
Singapore12:23 → 09:3419:2195 min19:210 min10 Feb
Sydney15:23 → 12:3419:5385 min19:520 min10 Feb
Suva16:23 → 13:3418:4390 min18:430 min10 Feb
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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