Ruling · Tila Caturthī · 1998

Saturday 31 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 443 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 Friday 30 January

Caturthī is absent from pradoṣa. Not taken.

17:36 sunsetpradoṣa ends 19:27
17:1217:3618:0018:2418:4819:1219:3620:00

0 of 111 minutes covered

Evening of Saturday 31 January

Taken. The only evening Caturthī reaches.

17:37 sunsetpradoṣa ends 19:28
17:1317:3718:0118:2518:4919:1319:3720:01

110 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 05:40 on Sat 31 Jan to 02:51 on Sun 1 Feb.

    1998-01-30T21:39:36Z → 1998-01-31T18:50:52Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:36–19:27 on the 30th, 17:37–19:28 on the 31st.

    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 111 minutes on the 30th and 110 of 110 on the 31st.

    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 26584 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1998: Saturday 31 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1998 falls on Saturday 31 January. Caturthī runs from 05:40 on Sat 31 Jan to 02:51 on Sun 1 Feb and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1998/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 31 Jan
Ahargaṇa, classicalDisc centre, no refractionSat 31 Jan
compat-drikpanchangComparison profileSat 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 Angeles13:40 → 10:5117:21108 min17:220 min30 Jan
Chicago15:40 → 12:5117:03112 min17:040 min30 Jan
Jersey City16:40 → 13:5117:11112 min17:120 min30 Jan
Port of Spain17:40 → 14:5118:0999 min18:100 min30 Jan
London21:40 → 18:5116:460 min16:47119 min31 Jan
Durban23:40 → 20:5118:550 min18:5484 min31 Jan
Dubai01:40 → 22:5118:020 min18:02104 min31 Jan
Delhi03:10 → 00:2117:580 min17:59105 min31 Jan
Kolkata03:10 → 00:2117:230 min17:24103 min31 Jan
Singapore05:40 → 02:5119:200 min19:2096 min31 Jan
Sydney08:40 → 05:5120:020 min20:0182 min31 Jan
Suva09:40 → 06:5118:470 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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