Ruling · Nāga Caturthī · 2026

Friday 13 November

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 335 minutes.

Decide it for

UjjainDelhiKolkataSingaporeSydneyJersey City

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Thursday 12 November

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 11:47  12:35 madhyāhna ends
10:5911:2311:4712:1112:3512:5913:23

0 of 48 minutes covered

Midday of Friday 13 November

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:47  12:35 madhyāhna ends
10:5911:2311:4712:1112:3512:5913:23

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 18:10 on Thu 12 Nov to 20:43 on Fri 13 Nov.

    2026-11-12T12:39:49Z → 2026-11-13T15:13:02Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 12th, 11:47–12:35 on the 13th.

    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 12th and 48 of 48 on the 13th.

    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 20095 s

  5. 05

    Ruling

    Nāga Caturthī, Ujjain, 2026: Friday 13 November.

    confidence: determinate

Say it like this

In Ujjain, Nāga Caturthī 2026 falls on Friday 13 November. Caturthī runs from 18:10 on Thu 12 Nov to 20:43 on Fri 13 Nov and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2026/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 13 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 13 Nov
compat-drikpanchangComparison profileFri 13 Nov
No institution has a recorded ruling for Ujjain.

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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles04:40 → 07:1311:1348 min11:130 min12 Nov
Chicago06:40 → 09:1311:1148 min11:110 min12 Nov
Jersey City07:40 → 10:1311:1648 min11:160 min12 Nov
Port of Spain08:40 → 11:1311:2648 min11:260 min12 Nov
London12:40 → 15:1311:200 min11:2048 min13 Nov
Durban14:40 → 17:1311:160 min11:1648 min13 Nov
Dubai16:40 → 19:1311:390 min11:3948 min13 Nov
Delhi18:10 → 20:4311:410 min11:4148 min13 Nov
Kolkata18:10 → 20:4310:570 min10:5748 min13 Nov
Singapore20:40 → 23:1312:250 min12:2548 min13 Nov
Sydney23:40 → 02:1312:150 min12:1648 min13 Nov
Suva00:40 → 03:1311:260 min11:2748 min13 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