Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 2001

Monday 7 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 592 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

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

Midday of Sunday 6 May

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:13  12:01 madhyāhna ends
10:2510:4911:1311:3712:0112:2512:49

0 of 48 minutes covered

Midday of Monday 7 May

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:13  12:01 madhyāhna ends
10:2510:4911:1311:3712:0112:2512:49

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 23:12 on Sun 6 May to 21:53 on Mon 7 May.

    2001-05-06T15:12:10Z → 2001-05-07T13:52:32Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 6th, 11:13–12:01 on the 7th.

    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 6th and 48 of 48 on the 7th.

    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 35495 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Daqing, 2001: Monday 7 May.

    confidence: determinate

Say it like this

In Daqing, Buddha Pūrṇimā (Vesak) 2001 falls on Monday 7 May. Pūrṇimā runs from 23:12 on Sun 6 May to 21:53 on Mon 7 May and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2001/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 7 May
Ahargaṇa, classicalDisc centre, no refractionMon 7 May
compat-drikpanchangComparison profileMon 7 May
No institution has a recorded ruling for Daqing.

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 6thCoveredMadhyāhna 7thCoveredRuled
Los Angeles08:12 → 06:5312:2648 min12:260 min6 May
Chicago10:12 → 08:5312:2348 min12:230 min6 May
Jersey City11:12 → 09:5312:2948 min12:290 min6 May
Port of Spain11:12 → 09:5311:3948 min11:390 min6 May
London16:12 → 14:5312:340 min12:3448 min7 May
Durban17:12 → 15:5311:280 min11:2848 min7 May
Dubai19:12 → 17:5311:520 min11:5148 min7 May
Delhi20:42 → 19:2311:540 min11:5448 min7 May
Kolkata20:42 → 19:2311:090 min11:0948 min7 May
Singapore23:12 → 21:5312:370 min12:3748 min7 May
Sydney01:12 → 23:5311:280 min11:2848 min7 May
Suva03:12 → 01:5311:390 min11:3948 min7 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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