Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 1991

Tuesday 28 May

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 304 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Monday 27 May

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 12:51  13:39 madhyāhna ends
12:0312:2712:5113:1513:3914:0314:27

0 of 48 minutes covered

Midday of Tuesday 28 May

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 12:51  13:39 madhyāhna ends
12:0312:2712:5113:1513:3914:0314:27

48 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 18:43 on Mon 27 May to 20:37 on Tue 28 May.

    1991-05-27T09:42:56Z → 1991-05-28T11:36:34Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:51–13:39 on the 27th, 12:51–13:39 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 0 of 48 minutes on the 27th and 48 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 18215 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Baoding, 1991: Tuesday 28 May.

    confidence: determinate

Say it like this

In Baoding, Buddha Pūrṇimā (Vesak) 1991 falls on Tuesday 28 May. Pūrṇimā runs from 18:43 on Mon 27 May to 20:37 on Tue 28 May and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1991/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 28 May
Ahargaṇa, classicalDisc centre, no refractionTue 28 May
compat-drikpanchangComparison profileTue 28 May
No institution has a recorded ruling for Baoding.

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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles02:43 → 04:3712:2648 min12:260 min27 May
Chicago04:43 → 06:3712:2448 min12:240 min27 May
Jersey City05:43 → 07:3712:3048 min12:300 min27 May
Port of Spain05:43 → 07:3711:3948 min11:390 min27 May
London10:43 → 12:3712:3448 min12:343 min27 May
Durban11:43 → 13:3711:2934 min11:2948 min28 May
Dubai13:43 → 15:3711:520 min11:5248 min28 May
Delhi15:13 → 17:0711:540 min11:5448 min28 May
Kolkata15:13 → 17:0711:100 min11:1048 min28 May
Singapore17:43 → 19:3712:380 min12:3848 min28 May
Sydney19:43 → 21:3711:280 min11:2848 min28 May
Suva21:43 → 23:3711:390 min11:3948 min28 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

About Ahargaṇa