Ruling · Nāga Caturthī · 2099

Sunday 15 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 18 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 15 November

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
Caturthī begins 12:08:35
10:5111:1511:3912:0312:2712:5113:15

18 of 48 minutes covered, the last 18

Midday of Monday 16 November

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 11:39  12:27 madhyāhna ends
Caturthī ends 10:56:48
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 12:09 on Sun 15 Nov to 10:57 on Mon 16 Nov.

    2099-11-15T04:08:35Z → 2099-11-16T02:56:49Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 15th, 11:39–12:27 on the 16th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturthī must be present during madhyāhna. It covers 18 of 48 minutes on the 15th and 0 of 48 on the 16th.

    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 1094 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 2099: Sunday 15 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 2099 falls on Sunday 15 November. Caturthī runs from 12:09 on Sun 15 Nov to 10:57 on Mon 16 Nov and covers 18 of 48 minutes of madhyāhna that midday.

ahargana.org/baoding/festivals/2099/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 15 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 15 Nov
compat-drikpanchangComparison profileSun 15 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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles20:09 → 18:5711:1448 min11:140 min15 Nov
Chicago22:09 → 20:5711:1148 min11:120 min15 Nov
Jersey City23:09 → 21:5711:1748 min11:170 min15 Nov
Port of Spain00:09 → 22:5711:2748 min11:270 min15 Nov
London04:09 → 02:5711:2148 min11:210 min15 Nov
Durban06:09 → 04:5711:1748 min11:170 min15 Nov
Dubai08:09 → 06:5711:4048 min11:400 min15 Nov
Delhi09:39 → 08:2711:4248 min11:420 min15 Nov
Kolkata09:39 → 08:2710:5748 min10:580 min15 Nov
Singapore12:09 → 10:5712:2548 min12:260 min15 Nov
Sydney15:09 → 13:5712:160 min12:1648 min16 Nov
Suva16:09 → 14:5711:270 min11:2748 min16 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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