Ruling · Tila Caturthī · 1976

Wednesday 4 February

Boundaryin Baoding, under the Rashtriya Panchang method. Both evenings qualify and the rule does not say which to take. Say “contested”.

Decide it for

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 Tuesday 3 February

Qualifies with 49 of 110 minutes. Not taken.

17:40 sunsetpradoṣa ends 19:30
Caturthī begins 18:40:48
17:1617:4018:0418:2818:5219:1619:40

49 of 110 minutes covered, the last 49

Evening of Wednesday 4 February

Taken. Both evenings qualify; the rule is silent, and this one is covered longer.

17:41 sunsetpradoṣa ends 19:31
17:1717:4118:0518:2918:5319:1719:41

109 of 109 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 18:41 on Tue 3 Feb to 21:02 on Wed 4 Feb.

    1976-02-03T10:40:48Z → 1976-02-04T13:01:56Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:40–19:30 on the 3rd, 17:41–19:31 on the 4th.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 49 of 110 minutes on the 3rd and 109 of 109 on the 4th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 2947 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1976: Wednesday 4 February.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Tila Caturthī 1976 falls on Wednesday 4 February. Caturthī runs from 18:41 on Tue 3 Feb to 21:02 on Wed 4 Feb and covers all of pradoṣa that evening. It also reaches the previous evening for 49 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/baoding/festivals/1976/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 4 Feb
Ahargaṇa, classicalDisc centre, no refractionWed 4 Feb
compat-drikpanchangComparison profileWed 4 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 3rdCoveredSunset 4thCoveredRuled
Los Angeles02:41 → 05:0217:25107 min17:260 min3 Feb
Chicago04:41 → 07:0217:07111 min17:080 min3 Feb
Jersey City05:41 → 08:0217:15111 min17:160 min3 Feb
Port of Spain06:41 → 09:0218:1099 min18:110 min3 Feb
London10:41 → 13:0216:52118 min16:540 min3 Feb
Durban12:41 → 15:0218:5385 min18:520 min3 Feb
Dubai14:41 → 17:0218:04104 min18:050 min3 Feb
Delhi16:11 → 18:3218:01105 min18:0230 min3 Feb
Kolkata16:11 → 18:3217:25103 min17:2666 min3 Feb
Singapore18:11 → 20:3218:5096 min18:5096 min3 Feb
Sydney21:41 → 00:0220:000 min19:5983 min4 Feb
Suva22:41 → 01:0218:460 min18:4689 min4 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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