Ruling · Tila Caturthī · 2013

Wednesday 13 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 420 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 Wednesday 13 February

Taken. The only evening Caturthī reaches.

17:53 sunsetpradoṣa ends 19:39
17:2917:5318:1718:4119:0519:2919:53

106 of 106 minutes covered

Evening of Thursday 14 February

Caturthī is absent from pradoṣa. Not taken.

17:54 sunsetpradoṣa ends 19:40
17:3017:5418:1818:4219:0619:3019:54

0 of 106 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 10:53 on Wed 13 Feb to 10:49 on Thu 14 Feb.

    2013-02-13T02:52:43Z → 2013-02-14T02:49:29Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:53–19:39 on the 13th, 17:54–19:40 on the 14th.

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

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 106 of 106 minutes on the 13th and 0 of 106 on the 14th.

    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 25206 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 2013: Wednesday 13 February.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 2013 falls on Wednesday 13 February. Caturthī runs from 10:53 on Wed 13 Feb to 10:49 on Thu 14 Feb and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2013/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 13 Feb
Ahargaṇa, classicalDisc centre, no refractionWed 13 Feb
compat-drikpanchangComparison profileWed 13 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 13thCoveredSunset 14thCoveredRuled
Los Angeles18:53 → 18:4917:3574 min17:360 min13 Feb
Chicago20:53 → 20:4917:21108 min17:230 min13 Feb
Jersey City21:53 → 21:4917:29107 min17:300 min13 Feb
Port of Spain22:53 → 22:4918:1398 min18:140 min13 Feb
London02:53 → 02:4917:12113 min17:140 min13 Feb
Durban04:53 → 04:4918:4587 min18:440 min13 Feb
Dubai06:53 → 06:4918:11102 min18:120 min13 Feb
Delhi08:23 → 08:1918:09103 min18:100 min13 Feb
Kolkata08:23 → 08:1917:32101 min17:320 min13 Feb
Singapore10:53 → 10:4919:2195 min19:210 min13 Feb
Sydney13:53 → 13:4919:5085 min19:490 min13 Feb
Suva14:53 → 14:4918:4290 min18:410 min13 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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