Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 1972

Saturday 27 May

Boundaryin Baoding, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. Say “contested”.

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 Saturday 27 May

Taken. Both middays qualify; the rule is silent, and this one is covered longer.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

48 of 48 minutes covered

Midday of Sunday 28 May

Qualifies with 36 of 48 minutes. Not taken.

madhyāhna begins 11:52  12:40 madhyāhna ends
Pūrṇimā ends 12:27:36
11:0411:2811:5212:1612:4013:0413:28

36 of 48 minutes covered, the first 36

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 10:17 on Sat 27 May to 12:28 on Sun 28 May.

    1972-05-27T02:16:38Z → 1972-05-28T04:27:37Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 27th, 11:52–12:40 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 36 of 48 on the 28th.

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

  4. 04

    Tie-break

    Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 715 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Baoding, 1972: Saturday 27 May.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Buddha Pūrṇimā (Vesak) 1972 falls on Saturday 27 May. Pūrṇimā runs from 10:17 on Sat 27 May to 12:28 on Sun 28 May and covers all of madhyāhna that midday. It also reaches the next midday for 36 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/baoding/festivals/1972/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 27 May
Ahargaṇa, classicalDisc centre, no refractionSat 27 May
compat-drikpanchangComparison profileSat 27 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 Angeles19:17 → 21:2812:2648 min12:260 min27 May
Chicago21:17 → 23:2812:2448 min12:240 min27 May
Jersey City22:17 → 00:2812:3048 min12:300 min27 May
Port of Spain22:17 → 00:2811:3948 min11:390 min27 May
London03:17 → 05:2812:3448 min12:340 min27 May
Durban04:17 → 06:2811:2948 min11:290 min27 May
Dubai06:17 → 08:2811:5248 min11:520 min27 May
Delhi07:47 → 09:5811:5448 min11:540 min27 May
Kolkata07:47 → 09:5811:1048 min11:100 min27 May
Singapore09:47 → 11:5812:0848 min12:080 min27 May
Sydney12:17 → 14:2811:280 min11:2848 min28 May
Suva14:17 → 16:2811:390 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

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