Ruling · Vināyaka Caturthī · 2026

Sunday 13 December

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 82 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 Saturday 12 December

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 11:56  12:44 madhyāhna ends
11:0811:3211:5612:2012:4413:0813:32

0 of 48 minutes covered

Midday of Sunday 13 December

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:57  12:45 madhyāhna ends
11:0911:3311:5712:2112:4513:0913:33

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 14:07 on Sat 12 Dec to 16:48 on Sun 13 Dec.

    2026-12-12T08:36:47Z → 2026-12-13T11:18:07Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 12th, 11:57–12:45 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. 108

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 4940 s

  5. 05

    Ruling

    Vināyaka Caturthī, Ujjain, 2026: Sunday 13 December.

    confidence: determinate

Say it like this

In Ujjain, Vināyaka Caturthī 2026 falls on Sunday 13 December. Caturthī runs from 14:07 on Sat 12 Dec to 16:48 on Sun 13 Dec and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2026/vinayaka-chaturthi?on=2026-12-13 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 13 Dec
Ahargaṇa, classicalDisc centre, no refractionSun 13 Dec
compat-drikpanchangComparison profileSun 13 Dec
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/vinayaka-chaturthi · ruleset 2026.3-draft

Month
Every lunation
Pakṣa · aṅga
Śukla · Caturthī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 108

“The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīMadhyāhna 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles00:37 → 03:1811:2348 min11:230 min12 Dec
Chicago02:37 → 05:1811:2048 min11:210 min12 Dec
Jersey City03:37 → 06:1811:2648 min11:270 min12 Dec
Port of Spain04:37 → 07:1811:3648 min11:360 min12 Dec
London08:37 → 11:1811:3048 min11:310 min12 Dec
Durban10:37 → 13:1811:2648 min11:2648 min12 Dec
Dubai12:37 → 15:1811:480 min11:4948 min13 Dec
Delhi14:07 → 16:4811:510 min11:5148 min13 Dec
Kolkata14:07 → 16:4811:060 min11:0748 min13 Dec
Singapore16:37 → 19:1812:340 min12:3548 min13 Dec
Sydney19:37 → 22:1812:250 min12:2548 min13 Dec
Suva20:37 → 23:1811:360 min11:3648 min13 Dec
Profile · tradition
pac-rp@2026.1 · smarta
Rule
vinayaka-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s