Ruling · Tila Caturthī · 1903

Sunday 1 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 616 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 31 January

Caturthī is absent from pradoṣa. Not taken.

17:37 sunsetpradoṣa ends 19:27
17:1317:3718:0118:2518:4919:1319:3720:01

0 of 111 minutes covered

Evening of Sunday 1 February

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

Caturthī presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 05:43 on Sun 1 Feb to 06:43 on Mon 2 Feb.

    1903-01-31T21:43:12Z → 1903-02-01T22:42:51Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:37–19:27 on the 31st, 17:38–19:28 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 0 of 111 minutes on the 31st and 110 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 36963 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1903: Sunday 1 February.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1903 falls on Sunday 1 February. Caturthī runs from 05:43 on Sun 1 Feb to 06:43 on Mon 2 Feb and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1903/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 1 Feb
Ahargaṇa, classicalDisc centre, no refractionSun 1 Feb
compat-drikpanchangComparison profileSun 1 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 31stCoveredSunset 1stCoveredRuled
Los Angeles13:43 → 14:4317:21108 min17:220 min31 Jan
Chicago15:43 → 16:4317:03112 min17:040 min31 Jan
Jersey City16:43 → 17:4317:11112 min17:1330 min31 Jan
Port of Spain17:43 → 18:4318:0999 min18:1033 min31 Jan
London21:43 → 22:4316:460 min16:48119 min1 Feb
Durban23:13 → 00:1318:250 min18:2584 min1 Feb
Dubai01:24 → 02:2417:430 min17:44104 min1 Feb
Delhi03:04 → 04:0417:490 min17:50105 min1 Feb
Kolkata03:04 → 04:0417:140 min17:15103 min1 Feb
Singapore04:38 → 05:3818:150 min18:1596 min1 Feb
Sydney07:43 → 08:4319:020 min19:0182 min1 Feb
Suva09:38 → 10:3818:420 min18:4289 min1 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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