Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 2018

Sunday 29 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 164 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 Sunday 29 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

Midday of Monday 30 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

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 09:08 on Sun 29 Apr to 08:58 on Mon 30 Apr.

    2018-04-29T01:07:43Z → 2018-04-30T00:58:11Z

  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 48 of 48 minutes on the 29th and 0 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 9848 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Baoding, 2018: Sunday 29 April.

    confidence: determinate

Say it like this

In Baoding, Buddha Pūrṇimā (Vesak) 2018 falls on Sunday 29 April. Pūrṇimā runs from 09:08 on Sun 29 Apr to 08:58 on Mon 30 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2018/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 29 Apr
Ahargaṇa, classicalDisc centre, no refractionSun 29 Apr
compat-drikpanchangComparison profileSun 29 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 Angeles18:08 → 17:5812:2748 min12:260 min29 Apr
Chicago20:08 → 19:5812:2448 min12:240 min29 Apr
Jersey City21:08 → 20:5812:3048 min12:300 min29 Apr
Port of Spain21:08 → 20:5811:3948 min11:390 min29 Apr
London02:08 → 01:5812:3448 min12:340 min29 Apr
Durban03:08 → 02:5811:2948 min11:290 min29 Apr
Dubai05:08 → 04:5811:5248 min11:520 min29 Apr
Delhi06:38 → 06:2811:5548 min11:550 min29 Apr
Kolkata06:38 → 06:2811:1048 min11:100 min29 Apr
Singapore09:08 → 08:5812:3848 min12:380 min29 Apr
Sydney11:08 → 10:5811:2848 min11:280 min29 Apr
Suva13:08 → 12:5811:400 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

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