Ruling · Tila Caturthī · 1986

Wednesday 12 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 577 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 12 February

Taken. The only evening Caturthī reaches.

17:51 sunsetpradoṣa ends 19:38
17:2717:5118:1518:3919:0319:2719:51

107 of 107 minutes covered

Evening of Thursday 13 February

Caturthī is absent from pradoṣa. Not taken.

17:52 sunsetpradoṣa ends 19:39
17:2817:5218:1618:4019:0419:2819:52

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 07:21 on Wed 12 Feb to 08:15 on Thu 13 Feb.

    1986-02-11T23:21:28Z → 1986-02-13T00:14:58Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:51–19:38 on the 12th, 17:52–19:39 on the 13th.

    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 12th and 0 of 107 on the 13th.

    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 34642 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1986: Wednesday 12 February.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1986 falls on Wednesday 12 February. Caturthī runs from 07:21 on Wed 12 Feb to 08:15 on Thu 13 Feb and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1986/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 12 Feb
Ahargaṇa, classicalDisc centre, no refractionWed 12 Feb
compat-drikpanchangComparison profileWed 12 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 11thCoveredSunset 13thCoveredRuled
Los Angeles15:21 → 16:1517:33105 min17:350 min11 Feb
Chicago17:21 → 18:1517:18105 min17:210 min11 Feb
Jersey City18:21 → 19:1517:2652 min17:280 min12 Feb
Port of Spain19:21 → 20:1518:1329 min18:130 min12 Feb
London23:21 → 00:1517:070 min17:110 min12 Feb
Durban01:21 → 02:1518:470 min18:450 min12 Feb
Dubai03:21 → 04:1518:100 min18:110 min12 Feb
Delhi04:51 → 05:4518:080 min18:090 min12 Feb
Kolkata04:51 → 05:4517:300 min17:320 min12 Feb
Singapore07:21 → 08:1519:210 min19:210 min12 Feb
Sydney10:21 → 11:1519:520 min19:500 min12 Feb
Suva11:21 → 12:1518:430 min18:420 min12 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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