Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 2029

Sunday 27 May

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 525 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 Sunday 27 May

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 12:00  12:48 madhyāhna ends
11:1211:3612:0012:2412:4813:1213:36

48 of 48 minutes covered

Midday of Monday 28 May

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 12:00  12:48 madhyāhna ends
11:1211:3612:0012:2412:4813:1213:36

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 03:15 on Sun 27 May to 00:08 on Mon 28 May.

    2029-05-26T21:45:30Z → 2029-05-27T18:37:31Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 27th, 12:00–12:48 on the 28th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 27th and 0 of 48 on the 28th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

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

    priority: unstated → only-day · margin 31480 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Ujjain, 2029: Sunday 27 May.

    confidence: determinate

Say it like this

In Ujjain, Buddha Pūrṇimā (Vesak) 2029 falls on Sunday 27 May. Pūrṇimā runs from 03:15 on Sun 27 May to 00:08 on Mon 28 May and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2029/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 27 May
Ahargaṇa, classicalDisc centre, no refractionSun 27 May
compat-drikpanchangComparison profileSun 27 May
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/buddha-purnima · ruleset 2026.3-draft

Month
Vaiśākha, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 102

“S 15 Sampat gauri vrata (paraviddha), Phuladola (Bengal & Orissa) (paraviddha), Gandhesvari puja (Bengal) (purvaviddha), Buddha purnima, Vaisakhi purnima.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāMadhyāhna 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles14:45 → 11:3812:260 min12:260 min27 May
Chicago16:45 → 13:3812:240 min12:2448 min27 May
Jersey City17:45 → 14:3812:300 min12:3048 min27 May
Port of Spain17:45 → 14:3811:390 min11:3948 min27 May
London22:45 → 19:3812:340 min12:3448 min27 May
Durban23:45 → 20:3811:290 min11:2948 min27 May
Dubai01:45 → 22:3811:520 min11:5248 min27 May
Delhi03:15 → 00:0811:540 min11:5448 min27 May
Kolkata03:15 → 00:0811:100 min11:1048 min27 May
Singapore05:45 → 02:3812:380 min12:3848 min27 May
Sydney07:45 → 04:3811:280 min11:2848 min27 May
Suva09:45 → 06:3811:390 min11:3948 min27 May
Profile · tradition
pac-rp@2026.1 · smarta
Rule
buddha-purnima@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s