Ruling · Nāga Caturthī · 1911

Thursday 26 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 215 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 Wednesday 25 October

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 Thursday 26 October

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 16:01 on Wed 25 Oct to 18:12 on Thu 26 Oct.

    1911-10-25T08:00:57Z → 1911-10-26T10:11:38Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 25th, 11:38–12:26 on the 26th.

    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 25th and 48 of 48 on the 26th.

    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 12885 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1911: Thursday 26 October.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 1911 falls on Thursday 26 October. Caturthī runs from 16:01 on Wed 25 Oct to 18:12 on Thu 26 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1911/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 26 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 26 Oct
compat-drikpanchangComparison profileThu 26 Oct
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 25thCoveredMadhyāhna 26thCoveredRuled
Los Angeles00:01 → 02:1211:1348 min11:130 min25 Oct
Chicago02:01 → 04:1211:1148 min11:100 min25 Oct
Jersey City03:01 → 05:1211:1648 min11:160 min25 Oct
Port of Spain04:01 → 06:1211:2648 min11:260 min25 Oct
London08:01 → 10:1211:2048 min11:200 min25 Oct
Durban10:01 → 12:1211:1648 min11:1648 min26 Oct
Dubai11:42 → 13:5311:2026 min11:2048 min26 Oct
Delhi13:31 → 15:4211:410 min11:4148 min26 Oct
Kolkata13:31 → 15:4210:570 min10:5748 min26 Oct
Singapore15:01 → 17:1211:250 min11:2548 min26 Oct
Sydney18:01 → 20:1211:160 min11:1648 min26 Oct
Suva19:56 → 22:0711:220 min11:2248 min26 Oct
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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