Ruling · Nāga Caturthī · 2084

Wednesday 1 November

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 52 s away. Say “contested”.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Wednesday 1 November

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:38  12:26 madhyāhna ends
Caturthī begins 11:34:49
10:5011:1411:3812:0212:2612:5013:14

48 of 48 minutes covered

Midday of Thursday 2 November

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 11:35 on Wed 1 Nov to 09:14 on Thu 2 Nov.

    2084-11-01T03:34:50Z → 2084-11-02T01:13:56Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 1st, 11:38–12:26 on the 2nd.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 1st and 0 of 48 on the 2nd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 172 s < 300 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 2084: Wednesday 1 November.

    confidence: boundary (margin)

Say it like this

In Baoding, Nāga Caturthī 2084 falls on Wednesday 1 November. Caturthī runs from 11:35 on Wed 1 Nov to 09:14 on Thu 2 Nov and covers all of madhyāhna that midday. It is 2 min 52 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2084/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 1 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 1 Nov
compat-drikpanchangComparison profileWed 1 Nov
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/naga-chaturthi · ruleset 2026.3-draft

Month
Kārtika, amānta
Pakṣa · aṅga
Śukla · Caturthī
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 4 Naga caturthi (paraviddha and madhyahnavyapini).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīMadhyāhna 1stCoveredMadhyāhna 2ndCoveredRuled
Los Angeles20:35 → 18:1412:1348 min12:130 min1 Nov
Chicago22:35 → 20:1412:1048 min12:100 min1 Nov
Jersey City23:35 → 21:1412:1648 min12:160 min1 Nov
Port of Spain23:35 → 21:1411:2648 min11:260 min1 Nov
London03:35 → 01:1411:2048 min11:200 min1 Nov
Durban05:35 → 03:1411:1648 min11:160 min1 Nov
Dubai07:35 → 05:1411:3848 min11:380 min1 Nov
Delhi09:05 → 06:4411:4148 min11:410 min1 Nov
Kolkata09:05 → 06:4410:5648 min10:560 min1 Nov
Singapore11:35 → 09:1412:2448 min12:240 min1 Nov
Sydney14:35 → 12:1412:150 min12:150 min2 Nov
Suva15:35 → 13:1411:260 min11:2648 min2 Nov
Profile · tradition
pac-rp@2026.1 · smarta
Rule
naga-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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