Ruling · Buddha Pūrṇimā · 1900

Monday 14 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 647 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 13 May

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:18  12:06 madhyāhna ends
10:3010:5411:1811:4212:0612:3012:54

0 of 48 minutes covered

Midday of Monday 14 May

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:18  12:06 madhyāhna ends
10:3010:5411:1811:4212:0612:3012:54

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 22:52 on Sun 13 May to 23:42 on Mon 14 May.

    1900-05-13T14:47:09Z → 1900-05-14T15:36:36Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:18–12:06 on the 13th, 11:18–12:06 on the 14th.

    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 13th and 48 of 48 on the 14th.

    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 38794 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Daqing, 1900: Monday 14 May.

    confidence: determinate

Say it like this

In Daqing, Buddha Pūrṇimā 1900 falls on Monday 14 May. Pūrṇimā runs from 22:52 on Sun 13 May to 23:42 on Mon 14 May and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1900/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 14 May
Ahargaṇa, classicalDisc centre, no refractionMon 14 May
compat-drikpanchangComparison profileMon 14 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 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles06:47 → 07:3711:2548 min11:250 min13 May
Chicago08:47 → 09:3711:2348 min11:230 min13 May
Jersey City09:47 → 10:3711:2948 min11:290 min13 May
Port of Spain10:47 → 11:3711:3848 min11:380 min13 May
London14:47 → 15:3711:330 min11:3348 min14 May
Durban16:17 → 17:0710:580 min10:5848 min14 May
Dubai18:28 → 19:1811:320 min11:3248 min14 May
Delhi20:08 → 20:5811:440 min11:4448 min14 May
Kolkata20:08 → 20:5811:000 min11:0048 min14 May
Singapore21:42 → 22:3211:320 min11:3248 min14 May
Sydney00:47 → 01:3711:270 min11:2748 min14 May
Suva02:42 → 03:3211:330 min11:3348 min14 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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