Ruling · Buddha Pūrṇimā · 1916

Wednesday 17 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 602 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 Wednesday 17 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 Thursday 18 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 01:11 on Wed 17 May to 22:11 on Wed 17 May.

    1916-05-16T17:10:31Z → 1916-05-17T14:11:04Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 17th, 11:13–12:01 on the 18th.

    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 17th and 0 of 48 on the 18th.

    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 36125 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Daqing, 1916: Wednesday 17 May.

    confidence: determinate

Say it like this

In Daqing, Buddha Pūrṇimā 1916 falls on Wednesday 17 May. Pūrṇimā runs from 01:11 on Wed 17 May to 22:11 on Wed 17 May and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1916/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 17 May
Ahargaṇa, classicalDisc centre, no refractionWed 17 May
compat-drikpanchangComparison profileWed 17 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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles09:11 → 06:1111:2548 min11:250 min16 May
Chicago11:11 → 08:1111:2348 min11:230 min16 May
Jersey City12:11 → 09:1111:296 min11:290 min16 May
Port of Spain13:11 → 10:1111:380 min11:380 min17 May
London17:11 → 14:1111:330 min11:3348 min17 May
Durban19:11 → 16:1111:280 min11:2848 min17 May
Dubai20:52 → 17:5211:320 min11:3248 min17 May
Delhi22:41 → 19:4111:530 min11:5348 min17 May
Kolkata22:41 → 19:4111:090 min11:0948 min17 May
Singapore00:11 → 21:1111:370 min11:3748 min17 May
Sydney03:11 → 00:1111:270 min11:2748 min17 May
Suva05:11 → 02:1111:380 min11:3848 min17 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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