Ruling · Nāga Caturthī · 1966

Wednesday 16 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 243 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

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 Tuesday 15 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

Midday of Wednesday 16 November

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

48 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 17:01 on Tue 15 Nov to 16:29 on Wed 16 Nov.

    1966-11-15T09:01:15Z → 1966-11-16T08:29:18Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 15th, 11:39–12:27 on the 16th.

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

  3. 03

    Rule

    Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 15th and 48 of 48 on the 16th.

    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 14559 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1966: Wednesday 16 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 1966 falls on Wednesday 16 November. Caturthī runs from 17:01 on Tue 15 Nov to 16:29 on Wed 16 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1966/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 16 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 16 Nov
compat-drikpanchangComparison profileWed 16 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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles01:01 → 00:2911:1348 min11:140 min15 Nov
Chicago03:01 → 02:2911:1148 min11:110 min15 Nov
Jersey City04:01 → 03:2911:1748 min11:170 min15 Nov
Port of Spain05:01 → 04:2911:2748 min11:270 min15 Nov
London09:01 → 08:2911:2148 min11:210 min15 Nov
Durban11:01 → 10:2911:1748 min11:170 min15 Nov
Dubai13:01 → 12:2911:390 min11:3948 min16 Nov
Delhi14:31 → 13:5911:410 min11:4248 min16 Nov
Kolkata14:31 → 13:5910:570 min10:5748 min16 Nov
Singapore16:31 → 15:5911:550 min11:5548 min16 Nov
Sydney19:01 → 18:2911:160 min11:1648 min16 Nov
Suva21:01 → 20:2911:270 min11:2748 min16 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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