Ruling · Nāga Caturthī · 1999

Friday 12 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 395 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 11 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 Friday 12 November

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

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 19:01 on Thu 11 Nov to 21:43 on Fri 12 Nov.

    1999-11-11T11:01:09Z → 1999-11-12T13:42:59Z

  2. 02

    Kāla

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

    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 11th and 48 of 48 on the 12th.

    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 23716 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1999: Friday 12 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 1999 falls on Friday 12 November. Caturthī runs from 19:01 on Thu 11 Nov to 21:43 on Fri 12 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1999/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 12 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 12 Nov
compat-drikpanchangComparison profileFri 12 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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles03:01 → 05:4311:1348 min11:130 min11 Nov
Chicago05:01 → 07:4311:1048 min11:110 min11 Nov
Jersey City06:01 → 08:4311:1648 min11:160 min11 Nov
Port of Spain07:01 → 09:4311:2648 min11:260 min11 Nov
London11:01 → 13:4311:2048 min11:2048 min12 Nov
Durban13:01 → 15:4311:160 min11:1648 min12 Nov
Dubai15:01 → 17:4311:390 min11:3948 min12 Nov
Delhi16:31 → 19:1311:410 min11:4148 min12 Nov
Kolkata16:31 → 19:1310:560 min10:5748 min12 Nov
Singapore19:01 → 21:4312:250 min12:2548 min12 Nov
Sydney22:01 → 00:4312:150 min12:1548 min12 Nov
Suva00:01 → 02:4312:260 min12:2648 min12 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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