Ruling · Nāga Caturthī · 2023

Friday 17 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 67 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 Thursday 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 Friday 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 15:05 on Thu 16 Nov to 13:34 on Fri 17 Nov.

    2023-11-16T07:05:13Z → 2023-11-17T05:33:59Z

  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 4031 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 2023: Friday 17 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 2023 falls on Friday 17 November. Caturthī runs from 15:05 on Thu 16 Nov to 13:34 on Fri 17 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2023/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 17 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 17 Nov
compat-drikpanchangComparison profileFri 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 Angeles23:05 → 21:3411:1448 min11:140 min16 Nov
Chicago01:05 → 23:3411:1148 min11:110 min16 Nov
Jersey City02:05 → 00:3411:1748 min11:170 min16 Nov
Port of Spain03:05 → 01:3411:2748 min11:270 min16 Nov
London07:05 → 05:3411:2148 min11:210 min16 Nov
Durban09:05 → 07:3411:1748 min11:170 min16 Nov
Dubai11:05 → 09:3411:3948 min11:400 min16 Nov
Delhi12:35 → 11:0411:420 min11:420 min17 Nov
Kolkata12:35 → 11:0410:570 min10:577 min17 Nov
Singapore15:05 → 13:3412:250 min12:2548 min17 Nov
Sydney18:05 → 16:3412:160 min12:1648 min17 Nov
Suva19:05 → 17:3411:270 min11:2748 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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