Ruling · Nāga Caturthī · 1917

Sunday 18 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 618 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 Sunday 18 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

Midday of Monday 19 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

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 01:21 on Sun 18 Nov to 00:17 on Mon 19 Nov.

    1917-11-17T17:21:12Z → 1917-11-18T16:17:24Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 18th, 11:39–12:27 on the 19th.

    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 18th and 0 of 48 on the 19th.

    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 37073 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1917: Sunday 18 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 1917 falls on Sunday 18 November. Caturthī runs from 01:21 on Sun 18 Nov to 00:17 on Mon 19 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1917/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 18 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 18 Nov
compat-drikpanchangComparison profileSun 18 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles09:21 → 08:1711:1448 min11:140 min17 Nov
Chicago11:21 → 10:1711:1138 min11:120 min17 Nov
Jersey City12:21 → 11:1711:170 min11:170 min18 Nov
Port of Spain13:21 → 12:1711:270 min11:2748 min18 Nov
London17:21 → 16:1711:210 min11:2148 min18 Nov
Durban19:21 → 18:1711:170 min11:1748 min18 Nov
Dubai21:02 → 19:5811:210 min11:2148 min18 Nov
Delhi22:51 → 21:4711:420 min11:4248 min18 Nov
Kolkata22:51 → 21:4710:570 min10:5848 min18 Nov
Singapore00:21 → 23:1711:260 min11:2648 min18 Nov
Sydney03:21 → 02:1711:160 min11:1648 min18 Nov
Suva05:21 → 04:1711:270 min11:2748 min18 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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