Ruling · Nāga Caturthī · 1909

Wednesday 17 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 141 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 16 November

Caturthī is absent from madhyāhna. Not taken.

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

0 of 48 minutes covered

Midday of Wednesday 17 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 14:48 on Tue 16 Nov to 15:26 on Wed 17 Nov.

    1909-11-16T06:47:34Z → 1909-11-17T07:25:35Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 16th, 11:39–12:27 on the 17th.

    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 16th and 48 of 48 on the 17th.

    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 8452 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1909: Wednesday 17 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 1909 falls on Wednesday 17 November. Caturthī runs from 14:48 on Tue 16 Nov to 15:26 on Wed 17 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1909/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 17 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 17 Nov
compat-drikpanchangComparison profileWed 17 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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles22:48 → 23:2611:1448 min11:140 min16 Nov
Chicago00:48 → 01:2611:1148 min11:110 min16 Nov
Jersey City01:48 → 02:2611:1748 min11:170 min16 Nov
Port of Spain02:48 → 03:2611:2748 min11:270 min16 Nov
London06:48 → 07:2611:2148 min11:210 min16 Nov
Durban08:48 → 09:2611:1748 min11:170 min16 Nov
Dubai10:29 → 11:0711:2048 min11:210 min16 Nov
Delhi12:18 → 12:5611:4212 min11:4248 min17 Nov
Kolkata12:18 → 12:5610:570 min10:5748 min17 Nov
Singapore13:48 → 14:2611:250 min11:2648 min17 Nov
Sydney16:48 → 17:2611:160 min11:1648 min17 Nov
Suva18:43 → 19:2111:220 min11:2248 min17 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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