Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 1998

Monday 11 May

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 473 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 Sunday 10 May

Pūrṇimā is absent from madhyāhna. Not taken.

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

0 of 48 minutes covered

Midday of Monday 11 May

Taken. The only midday Pūrṇimā reaches.

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

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 20:32 on Sun 10 May to 22:29 on Mon 11 May.

    1998-05-10T12:32:05Z → 1998-05-11T14:29:21Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 10th, 11:51–12:39 on the 11th.

    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 10th and 48 of 48 on the 11th.

    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 28394 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Baoding, 1998: Monday 11 May.

    confidence: determinate

Say it like this

In Baoding, Buddha Pūrṇimā (Vesak) 1998 falls on Monday 11 May. Pūrṇimā runs from 20:32 on Sun 10 May to 22:29 on Mon 11 May and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1998/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 11 May
Ahargaṇa, classicalDisc centre, no refractionMon 11 May
compat-drikpanchangComparison profileMon 11 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 10thCoveredMadhyāhna 11thCoveredRuled
Los Angeles05:32 → 07:2912:2648 min12:260 min10 May
Chicago07:32 → 09:2912:2348 min12:230 min10 May
Jersey City08:32 → 10:2912:2948 min12:290 min10 May
Port of Spain08:32 → 10:2911:3948 min11:380 min10 May
London13:32 → 15:2912:330 min12:3348 min11 May
Durban14:32 → 16:2911:280 min11:2848 min11 May
Dubai16:32 → 18:2911:510 min11:5148 min11 May
Delhi18:02 → 19:5911:540 min11:5448 min11 May
Kolkata18:02 → 19:5911:090 min11:0948 min11 May
Singapore20:32 → 22:2912:370 min12:3748 min11 May
Sydney22:32 → 00:2911:270 min11:2748 min11 May
Suva00:32 → 02:2911:390 min11:3948 min11 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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