Ruling · Tila Caturthī · 2017

Tuesday 31 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 624 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 Tuesday 31 January

Taken. The only evening Caturthī reaches.

17:38 sunsetpradoṣa ends 19:28
17:1417:3818:0218:2618:5019:1419:3820:02

110 of 110 minutes covered

Evening of Wednesday 1 February

Caturthī is absent from pradoṣa. Not taken.

17:39 sunsetpradoṣa ends 19:29
17:1517:3918:0318:2718:5119:1519:3920:03

0 of 110 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 07:14 on Tue 31 Jan to 06:11 on Wed 1 Feb.

    2017-01-30T23:13:47Z → 2017-01-31T22:11:20Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:38–19:28 on the 31st, 17:39–19:29 on the 1st.

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

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 110 of 110 minutes on the 31st and 0 of 110 on the 1st.

    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 37444 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 2017: Tuesday 31 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 2017 falls on Tuesday 31 January. Caturthī runs from 07:14 on Tue 31 Jan to 06:11 on Wed 1 Feb and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2017/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 31 Jan
Ahargaṇa, classicalDisc centre, no refractionTue 31 Jan
compat-drikpanchangComparison profileTue 31 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 30thCoveredSunset 31stCoveredRuled
Los Angeles15:14 → 14:1117:22108 min17:230 min30 Jan
Chicago17:14 → 16:1117:03102 min17:050 min30 Jan
Jersey City18:14 → 17:1117:1249 min17:130 min30 Jan
Port of Spain19:14 → 18:1118:0934 min18:102 min30 Jan
London23:14 → 22:1116:460 min16:48119 min31 Jan
Durban01:14 → 00:1118:550 min18:5484 min31 Jan
Dubai03:14 → 02:1118:020 min18:03104 min31 Jan
Delhi04:44 → 03:4117:580 min17:59105 min31 Jan
Kolkata04:44 → 03:4117:230 min17:24103 min31 Jan
Singapore07:14 → 06:1119:200 min19:2096 min31 Jan
Sydney10:14 → 09:1120:020 min20:0182 min31 Jan
Suva11:14 → 10:1118:470 min18:4789 min31 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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