Ruling · Buddha Pūrṇimā · 2003

Thursday 15 May

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 46 minutes.

Decide it for

TehranDelhiKolkataSingaporeSydneyJersey City

35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two middays

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

Midday of Thursday 15 May

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 12:37  13:25 madhyāhna ends
Pūrṇimā begins 11:50:45
11:4912:1312:3713:0113:2513:4914:13

48 of 48 minutes covered

Midday of Friday 16 May

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 12:37  13:25 madhyāhna ends
11:4912:1312:3713:0113:2513:4914:13

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 11:51 on Thu 15 May to 08:06 on Fri 16 May.

    2003-05-15T07:20:46Z → 2003-05-16T03:35:58Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 15th, 12:37–13:25 on the 16th.

    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 15th and 0 of 48 on the 16th.

    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 2767 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Tehran, 2003: Thursday 15 May.

    confidence: determinate

Say it like this

In Tehran, Buddha Pūrṇimā 2003 falls on Thursday 15 May. Pūrṇimā runs from 11:51 on Thu 15 May to 08:06 on Fri 16 May and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2003/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 15 May
Ahargaṇa, classicalDisc centre, no refractionThu 15 May
compat-drikpanchangComparison profileThu 15 May
No institution has a recorded ruling for Tehran.

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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles00:21 → 20:3612:2648 min12:260 min15 May
Chicago02:21 → 22:3612:2348 min12:230 min15 May
Jersey City03:21 → 23:3612:2948 min12:290 min15 May
Port of Spain03:21 → 23:3611:3848 min11:380 min15 May
London08:21 → 04:3612:3348 min12:330 min15 May
Durban09:21 → 05:3611:2848 min11:280 min15 May
Dubai11:21 → 07:3611:5148 min11:510 min15 May
Delhi12:51 → 09:0611:540 min11:540 min16 May
Kolkata12:51 → 09:0611:090 min11:090 min16 May
Singapore15:21 → 11:3612:370 min12:370 min16 May
Sydney17:21 → 13:3611:270 min11:2748 min16 May
Suva19:21 → 15:3611:390 min11:3948 min16 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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