Ruling · Tila Caturthī · 1981

Sunday 8 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 142 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 7 February

Caturthī is absent from pradoṣa. Not taken.

17:46 sunsetpradoṣa ends 19:34
17:2217:4618:1018:3418:5819:2219:46

0 of 108 minutes covered

Evening of Sunday 8 February

Taken. The only evening Caturthī reaches.

17:47 sunsetpradoṣa ends 19:35
17:2317:4718:1118:3518:5919:2319:47

108 of 108 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 00:21 on Sun 8 Feb to 21:57 on Sun 8 Feb.

    1981-02-07T16:20:37Z → 1981-02-08T13:56:56Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:46–19:34 on the 7th, 17:47–19:35 on the 8th.

    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 108 minutes on the 7th and 108 of 108 on the 8th.

    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 8519 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1981: Sunday 8 February.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1981 falls on Sunday 8 February. Caturthī runs from 00:21 on Sun 8 Feb to 21:57 on Sun 8 Feb and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1981/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 8 Feb
Ahargaṇa, classicalDisc centre, no refractionSun 8 Feb
compat-drikpanchangComparison profileSun 8 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 7thCoveredSunset 8thCoveredRuled
Los Angeles08:21 → 05:5717:29106 min17:300 min7 Feb
Chicago10:21 → 07:5717:13110 min17:150 min7 Feb
Jersey City11:21 → 08:5717:21109 min17:220 min7 Feb
Port of Spain12:21 → 09:5718:1298 min18:120 min7 Feb
London16:21 → 13:5717:00116 min17:020 min7 Feb
Durban18:21 → 15:5718:5085 min18:490 min7 Feb
Dubai20:21 → 17:5718:070 min18:080 min7 Feb
Delhi21:51 → 19:2718:050 min18:0681 min8 Feb
Kolkata21:51 → 19:2717:280 min17:29102 min8 Feb
Singapore23:51 → 21:2718:510 min18:5196 min8 Feb
Sydney03:21 → 00:5719:560 min19:5584 min8 Feb
Suva04:21 → 01:5718:440 min18:4490 min8 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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