Ruling · Vināyaka Caturthī · 2026

Monday 20 April

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 274 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 Monday 20 April

Taken. The only midday Caturthī reaches.

madhyāhna begins 12:02  12:50 madhyāhna ends
11:1411:3812:0212:2612:5013:1413:38

48 of 48 minutes covered

Midday of Tuesday 21 April

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 12:02  12:50 madhyāhna ends
11:1411:3812:0212:2612:5013:1413:38

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 07:28 on Mon 20 Apr to 04:15 on Tue 21 Apr.

    2026-04-20T01:58:01Z → 2026-04-20T22:45:21Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:02–12:50 on the 20th, 12:02–12:50 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 48 of 48 minutes on the 20th and 0 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 16439 s

  5. 05

    Ruling

    Vināyaka Caturthī, Ujjain, 2026: Monday 20 April.

    confidence: determinate

Say it like this

In Ujjain, Vināyaka Caturthī 2026 falls on Monday 20 April. Caturthī runs from 07:28 on Mon 20 Apr to 04:15 on Tue 21 Apr and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2026/vinayaka-chaturthi?on=2026-04-20 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 20 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 20 Apr
compat-drikpanchangComparison profileMon 20 Apr
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 Angeles18:58 → 15:4512:2848 min12:280 min20 Apr
Chicago20:58 → 17:4512:2648 min12:260 min20 Apr
Jersey City21:58 → 18:4512:3248 min12:310 min20 Apr
Port of Spain21:58 → 18:4511:4148 min11:410 min20 Apr
London02:58 → 23:4512:3648 min12:360 min20 Apr
Durban03:58 → 00:4511:3148 min11:300 min20 Apr
Dubai05:58 → 02:4511:5448 min11:540 min20 Apr
Delhi07:28 → 04:1511:5648 min11:560 min20 Apr
Kolkata07:28 → 04:1511:1248 min11:110 min20 Apr
Singapore09:58 → 06:4512:4048 min12:390 min20 Apr
Sydney11:58 → 08:4511:3020 min11:300 min20 Apr
Suva13:58 → 10:4511:410 min11:410 min21 Apr
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