Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 1979

Friday 11 May

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 75 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 Friday 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

Midday of Saturday 12 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

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 10:36 on Fri 11 May to 10:01 on Sat 12 May.

    1979-05-11T02:35:52Z → 1979-05-12T02:00:51Z

  2. 02

    Kāla

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

    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 11th and 0 of 48 on the 12th.

    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 4495 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Baoding, 1979: Friday 11 May.

    confidence: determinate

Say it like this

In Baoding, Buddha Pūrṇimā (Vesak) 1979 falls on Friday 11 May. Pūrṇimā runs from 10:36 on Fri 11 May to 10:01 on Sat 12 May and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1979/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 11 May
Ahargaṇa, classicalDisc centre, no refractionFri 11 May
compat-drikpanchangComparison profileFri 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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles19:36 → 19:0112:2648 min12:260 min11 May
Chicago21:36 → 21:0112:2348 min12:230 min11 May
Jersey City22:36 → 22:0112:2948 min12:290 min11 May
Port of Spain22:36 → 22:0111:3848 min11:380 min11 May
London03:36 → 03:0112:3348 min12:330 min11 May
Durban04:36 → 04:0111:2848 min11:280 min11 May
Dubai06:36 → 06:0111:5148 min11:510 min11 May
Delhi08:06 → 07:3111:5448 min11:540 min11 May
Kolkata08:06 → 07:3111:0948 min11:090 min11 May
Singapore10:06 → 09:3112:0748 min12:070 min11 May
Sydney12:36 → 12:0111:270 min11:2734 min12 May
Suva14:36 → 14:0111:390 min11:3948 min12 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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