Ruling · Tila Caturthī · 2099

Sunday 25 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 305 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 Saturday 24 January

Caturthī is absent from pradoṣa. Not taken.

17:30 sunsetpradoṣa ends 19:22
17:0617:3017:5418:1818:4219:0619:3019:54

0 of 112 minutes covered

Evening of Sunday 25 January

Taken. The only evening Caturthī reaches.

17:31 sunsetpradoṣa ends 19:23
17:0717:3117:5518:1918:4319:0719:3119:55

112 of 112 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 00:27 on Sun 25 Jan to 03:13 on Mon 26 Jan.

    2099-01-24T16:26:50Z → 2099-01-25T19:12:50Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:30–19:22 on the 24th, 17:31–19:23 on the 25th.

    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 112 minutes on the 24th and 112 of 112 on the 25th.

    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 18281 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 2099: Sunday 25 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 2099 falls on Sunday 25 January. Caturthī runs from 00:27 on Sun 25 Jan to 03:13 on Mon 26 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2099/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 25 Jan
Ahargaṇa, classicalDisc centre, no refractionSun 25 Jan
compat-drikpanchangComparison profileSun 25 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 24thCoveredSunset 25thCoveredRuled
Los Angeles08:27 → 11:1317:16109 min17:170 min24 Jan
Chicago10:27 → 13:1316:56114 min16:570 min24 Jan
Jersey City11:27 → 14:1317:05113 min17:060 min24 Jan
Port of Spain12:27 → 15:1318:0799 min18:070 min24 Jan
London16:27 → 19:1316:36122 min16:38121 min24 Jan
Durban18:27 → 21:1318:5883 min18:5783 min25 Jan
Dubai20:27 → 23:1317:580 min17:58105 min25 Jan
Delhi21:57 → 00:4317:540 min17:55106 min25 Jan
Kolkata21:57 → 00:4317:190 min17:20104 min25 Jan
Singapore00:27 → 03:1319:180 min19:1996 min25 Jan
Sydney03:27 → 06:1320:050 min20:0581 min25 Jan
Suva04:27 → 07:1318:480 min18:4888 min25 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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