Ruling · Buddha Pūrṇimā (Vaiśākhī Pūrṇimā) · 2099

Monday 4 May

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 432 minutes.

Decide it for

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 Monday 4 May

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 Tuesday 5 May

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 04:40 on Mon 4 May to 02:01 on Tue 5 May.

    2099-05-03T20:40:07Z → 2099-05-04T18:00:37Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 4th, 11:52–12:40 on the 5th.

    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 4th and 0 of 48 on the 5th.

    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 25895 s

  5. 05

    Ruling

    Buddha Pūrṇimā, Baoding, 2099: Monday 4 May.

    confidence: determinate

Say it like this

In Baoding, Buddha Pūrṇimā (Vesak) 2099 falls on Monday 4 May. Pūrṇimā runs from 04:40 on Mon 4 May to 02:01 on Tue 5 May and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2099/buddha-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 4 May
Ahargaṇa, classicalDisc centre, no refractionMon 4 May
compat-drikpanchangComparison profileMon 4 May
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 3rdCoveredMadhyāhna 4thCoveredRuled
Los Angeles13:40 → 11:0112:270 min12:260 min4 May
Chicago15:40 → 13:0112:240 min12:2436 min4 May
Jersey City16:40 → 14:0112:300 min12:3048 min4 May
Port of Spain16:40 → 14:0111:390 min11:3948 min4 May
London21:40 → 19:0112:340 min12:3448 min4 May
Durban22:40 → 20:0111:290 min11:2948 min4 May
Dubai00:40 → 22:0111:520 min11:5248 min4 May
Delhi02:10 → 23:3111:550 min11:5548 min4 May
Kolkata02:10 → 23:3111:100 min11:1048 min4 May
Singapore04:40 → 02:0112:380 min12:3848 min4 May
Sydney06:40 → 04:0111:280 min11:2848 min4 May
Suva08:40 → 06:0111:400 min11:3948 min4 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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