Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 1987

Wednesday 13 May

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 491 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 Tuesday 12 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 Wednesday 13 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 00:13 on Wed 13 May to 21:50 on Wed 13 May.

    1987-05-12T15:12:48Z → 1987-05-13T12:50:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:51–13:39 on the 12th, 12:51–13:39 on the 13th.

    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 12th and 48 of 48 on the 13th.

    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 29489 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Baoding, 1987: Wednesday 13 May.

    confidence: determinate

Say it like this

In Baoding, Buddha Pūrṇimā (Vesak) 1987 falls on Wednesday 13 May. Pūrṇimā runs from 00:13 on Wed 13 May to 21:50 on Wed 13 May and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1987/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 13 May
Ahargaṇa, classicalDisc centre, no refractionWed 13 May
compat-drikpanchangComparison profileWed 13 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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles08:13 → 05:5012:2648 min12:260 min12 May
Chicago10:13 → 07:5012:2348 min12:230 min12 May
Jersey City11:13 → 08:5012:2948 min12:290 min12 May
Port of Spain11:13 → 08:5011:3848 min11:380 min12 May
London16:13 → 13:5012:330 min12:3348 min13 May
Durban17:13 → 14:5011:280 min11:2848 min13 May
Dubai19:13 → 16:5011:510 min11:5148 min13 May
Delhi20:43 → 18:2011:540 min11:5448 min13 May
Kolkata20:43 → 18:2011:090 min11:0948 min13 May
Singapore23:13 → 20:5012:370 min12:3748 min13 May
Sydney01:13 → 22:5011:270 min11:2748 min13 May
Suva03:13 → 00:5011:390 min11:3948 min13 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