Ruling · Caitrī Pūrṇimā · 1992

Friday 17 April

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 0 min 25 s away. Say “contested”.

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 Thursday 16 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
11:0611:3011:5412:1812:4213:0613:30

0 of 48 minutes covered

Midday of Friday 17 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:54  12:42 madhyāhna ends
Pūrṇimā ends 12:42:28
11:0611:3011:5412:1812:4213:0613:30

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 14:39 on Thu 16 Apr to 12:42 on Fri 17 Apr.

    1992-04-16T06:38:37Z → 1992-04-17T04:42:28Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 16th, 11:54–12:42 on the 17th.

    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 16th and 48 of 48 on the 17th.

    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: paraviddha → only-day · margin 25 s < 300 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 1992: Friday 17 April.

    confidence: boundary (margin)

Say it like this

In Baoding, Caitrī Pūrṇimā 1992 falls on Friday 17 April. Pūrṇimā runs from 14:39 on Thu 16 Apr to 12:42 on Fri 17 Apr and covers all of madhyāhna that midday. It is 0 min 25 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1992/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 17 Apr
Ahargaṇa, classicalDisc centre, no refractionFri 17 Apr
compat-drikpanchangComparison profileFri 17 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/chaitri-purnima · ruleset 2026.3-draft

Month
Caitra, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 102

“S 15 Caitri purnima (paraviddha), Hanumat jayanti, Oli ending (Jain).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāMadhyāhna 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles23:39 → 21:4212:2948 min12:290 min16 Apr
Chicago01:39 → 23:4212:2748 min12:260 min16 Apr
Jersey City02:39 → 00:4212:3248 min12:320 min16 Apr
Port of Spain02:39 → 00:4211:4248 min11:420 min16 Apr
London07:39 → 05:4212:3748 min12:370 min16 Apr
Durban08:39 → 06:4211:3148 min11:310 min16 Apr
Dubai10:39 → 08:4211:5548 min11:540 min16 Apr
Delhi12:09 → 10:1211:5736 min11:570 min16 Apr
Kolkata12:09 → 10:1211:130 min11:120 min17 Apr
Singapore14:39 → 12:4212:400 min12:402 min17 Apr
Sydney16:39 → 14:4211:310 min11:3148 min17 Apr
Suva18:39 → 16:4211:420 min11:4248 min17 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
chaitri-purnima@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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