Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 1980

Wednesday 30 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 63 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Tuesday 29 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:52  12:40 madhyāhna ends
11:0411:2811:5212:1612:4013:0413:28

0 of 48 minutes covered

Midday of Wednesday 30 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:52  12:40 madhyāhna ends
11:0411:2811:5212:1612:4013:0413:28

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 13:43 on Tue 29 Apr to 15:35 on Wed 30 Apr.

    1980-04-29T05:43:15Z → 1980-04-30T07:35:16Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 29th, 11:52–12:40 on the 30th.

    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 29th and 48 of 48 on the 30th.

    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 3808 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Baoding, 1980: Wednesday 30 April.

    confidence: determinate

Say it like this

In Baoding, Buddha Pūrṇimā (Vesak) 1980 falls on Wednesday 30 April. Pūrṇimā runs from 13:43 on Tue 29 Apr to 15:35 on Wed 30 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1980/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 30 Apr
Ahargaṇa, classicalDisc centre, no refractionWed 30 Apr
compat-drikpanchangComparison profileWed 30 Apr
No institution has a recorded ruling for Baoding.

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 29thCoveredMadhyāhna 30thCoveredRuled
Los Angeles22:43 → 00:3512:2648 min12:260 min29 Apr
Chicago00:43 → 02:3512:2448 min12:240 min29 Apr
Jersey City01:43 → 03:3512:3048 min12:300 min29 Apr
Port of Spain01:43 → 03:3511:3948 min11:390 min29 Apr
London06:43 → 08:3512:3448 min12:340 min29 Apr
Durban07:43 → 09:3511:2948 min11:290 min29 Apr
Dubai09:43 → 11:3511:5248 min11:520 min29 Apr
Delhi11:13 → 13:0511:5548 min11:5448 min29 Apr
Kolkata11:13 → 13:0511:1045 min11:1048 min30 Apr
Singapore13:13 → 15:0512:080 min12:0848 min30 Apr
Sydney15:43 → 17:3511:280 min11:2848 min30 Apr
Suva17:43 → 19:3511:400 min11:3948 min30 Apr
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

About Ahargaṇa