Ruling · Nāga Caturthī · 2031

Tuesday 18 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 401 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 Monday 17 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 Tuesday 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

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 21:51 on Mon 17 Nov to 19:08 on Tue 18 Nov.

    2031-11-17T13:50:56Z → 2031-11-18T11:08:28Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 17th, 11:39–12:27 on the 18th.

    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 17th and 48 of 48 on the 18th.

    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 24088 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 2031: Tuesday 18 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 2031 falls on Tuesday 18 November. Caturthī runs from 21:51 on Mon 17 Nov to 19:08 on Tue 18 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2031/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 18 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 18 Nov
compat-drikpanchangComparison profileTue 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 Angeles05:51 → 03:0811:1448 min11:140 min17 Nov
Chicago07:51 → 05:0811:1148 min11:120 min17 Nov
Jersey City08:51 → 06:0811:1748 min11:170 min17 Nov
Port of Spain09:51 → 07:0811:2748 min11:270 min17 Nov
London13:51 → 11:0811:210 min11:210 min18 Nov
Durban15:51 → 13:0811:170 min11:1748 min18 Nov
Dubai17:51 → 15:0811:400 min11:4048 min18 Nov
Delhi19:21 → 16:3811:420 min11:4248 min18 Nov
Kolkata19:21 → 16:3810:570 min10:5848 min18 Nov
Singapore21:51 → 19:0812:250 min12:2648 min18 Nov
Sydney00:51 → 22:0812:160 min12:1648 min18 Nov
Suva01:51 → 23:0811:270 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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