Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 2016

Saturday 21 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 359 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 Saturday 21 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

Midday of Sunday 22 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

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 03:12 on Sat 21 May to 05:14 on Sun 22 May.

    2016-05-20T19:12:15Z → 2016-05-21T21:14:25Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 21st, 11:13–12:01 on the 22nd.

    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 21st and 0 of 48 on the 22nd.

    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 21515 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Daqing, 2016: Saturday 21 May.

    confidence: determinate

Say it like this

In Daqing, Buddha Pūrṇimā (Vesak) 2016 falls on Saturday 21 May. Pūrṇimā runs from 03:12 on Sat 21 May to 05:14 on Sun 22 May and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2016/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 21 May
Ahargaṇa, classicalDisc centre, no refractionSat 21 May
compat-drikpanchangComparison profileSat 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles12:12 → 14:1412:2648 min12:2648 min20 May
Chicago14:12 → 16:1412:230 min12:2448 min21 May
Jersey City15:12 → 17:1412:290 min12:2948 min21 May
Port of Spain15:12 → 17:1411:390 min11:3948 min21 May
London20:12 → 22:1412:330 min12:3448 min21 May
Durban21:12 → 23:1411:280 min11:2848 min21 May
Dubai23:12 → 01:1411:510 min11:5148 min21 May
Delhi00:42 → 02:4411:540 min11:5448 min21 May
Kolkata00:42 → 02:4411:090 min11:0948 min21 May
Singapore03:12 → 05:1412:370 min12:3748 min21 May
Sydney05:12 → 07:1411:280 min11:2848 min21 May
Suva07:12 → 09:1411:390 min11:3948 min21 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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