Ruling · Tila Caturthī · 1907

Thursday 17 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 532 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 16 January

Caturthī is absent from pradoṣa. Not taken.

17:20 sunsetpradoṣa ends 19:14
16:5617:2017:4418:0818:3218:5619:2019:44

0 of 114 minutes covered

Evening of Thursday 17 January

Taken. The only evening Caturthī reaches.

17:21 sunsetpradoṣa ends 19:15
16:5717:2117:4518:0918:3318:5719:2119:45

114 of 114 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 05:42 on Thu 17 Jan to 04:07 on Fri 18 Jan.

    1907-01-16T21:42:23Z → 1907-01-17T20:07:10Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:20–19:14 on the 16th, 17:21–19:15 on the 17th.

    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 114 minutes on the 16th and 114 of 114 on the 17th.

    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 31949 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1907: Thursday 17 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1907 falls on Thursday 17 January. Caturthī runs from 05:42 on Thu 17 Jan to 04:07 on Fri 18 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1907/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 17 Jan
Ahargaṇa, classicalDisc centre, no refractionThu 17 Jan
compat-drikpanchangComparison profileThu 17 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 16thCoveredSunset 17thCoveredRuled
Los Angeles13:42 → 12:0717:07111 min17:080 min16 Jan
Chicago15:42 → 14:0716:45116 min16:460 min16 Jan
Jersey City16:42 → 15:0716:53115 min16:550 min16 Jan
Port of Spain17:42 → 16:0718:03100 min18:030 min16 Jan
London21:42 → 20:0716:200 min16:22125 min17 Jan
Durban23:42 → 22:0719:010 min19:0082 min17 Jan
Dubai01:23 → 23:4817:320 min17:32106 min17 Jan
Delhi03:12 → 01:3717:460 min17:47108 min17 Jan
Kolkata03:12 → 01:3717:130 min17:14105 min17 Jan
Singapore04:42 → 03:0718:160 min18:1696 min17 Jan
Sydney07:42 → 06:0719:090 min19:0979 min17 Jan
Suva09:37 → 08:0218:440 min18:4487 min17 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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