Ruling · Vināyaka Caturthī · 2026

Saturday 21 February

Boundaryin Ujjain, under the Rashtriya Panchang method. A threshold is only 3 min 17 s away. Say “contested”.

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 Friday 20 February

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 12:17  13:05 madhyāhna ends
11:2911:5312:1712:4113:0513:2913:53

0 of 48 minutes covered

Midday of Saturday 21 February

Taken. The only midday Caturthī reaches.

madhyāhna begins 12:17  13:05 madhyāhna ends
Caturthī ends 13:01:20
11:2911:5312:1712:4113:0513:2913:53

45 of 48 minutes covered, the first 45

Caturthī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 14:39 on Fri 20 Feb to 13:01 on Sat 21 Feb.

    2026-02-20T09:08:55Z → 2026-02-21T07:31:21Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:17–13:05 on the 20th, 12:17–13:05 on the 21st.

    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 20th and 45 of 48 on the 21st.

    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 197 s < 300 s

  5. 05

    Ruling

    Vināyaka Caturthī, Ujjain, 2026: Saturday 21 February.

    confidence: boundary (margin)

Say it like this

In Ujjain, Vināyaka Caturthī 2026 falls on Saturday 21 February. Caturthī runs from 14:39 on Fri 20 Feb to 13:01 on Sat 21 Feb and covers 45 of 48 minutes of madhyāhna that midday. It is 3 min 17 s from a threshold: treat the date as contested.

ahargana.org/ujjain/festivals/2026/vinayaka-chaturthi?on=2026-02-21 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 21 Feb
Ahargaṇa, classicalDisc centre, no refractionSat 21 Feb
compat-drikpanchangComparison profileSat 21 Feb
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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles01:09 → 23:3111:4348 min11:430 min20 Feb
Chicago03:09 → 01:3111:4148 min11:400 min20 Feb
Jersey City04:09 → 02:3111:4648 min11:460 min20 Feb
Port of Spain05:09 → 03:3111:5648 min11:560 min20 Feb
London09:09 → 07:3111:5148 min11:500 min20 Feb
Durban11:09 → 09:3111:4548 min11:450 min20 Feb
Dubai13:09 → 11:3112:090 min12:090 min21 Feb
Delhi14:39 → 13:0112:110 min12:1148 min21 Feb
Kolkata14:39 → 13:0111:260 min11:2648 min21 Feb
Singapore17:09 → 15:3112:540 min12:5448 min21 Feb
Sydney20:09 → 18:3112:450 min12:4548 min21 Feb
Suva21:09 → 19:3111:560 min11:5648 min21 Feb
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