Ruling · Caitrī Pūrṇimā · 1954

Sunday 18 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 31 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 Saturday 17 April

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
Pūrṇimā begins 11:23:04
11:0611:3011:5412:1812:4213:0613:30

48 of 48 minutes covered

Midday of Sunday 18 April

Taken. Both middays qualify; the rule takes the second.

madhyāhna begins 11:54  12:42 madhyāhna ends
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 11:23 on Sat 17 Apr to 13:48 on Sun 18 Apr.

    1954-04-17T03:23:05Z → 1954-04-18T05:48:27Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 17th, 11:54–12:42 on the 18th.

    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 17th and 48 of 48 on the 18th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 1867 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 1954: Sunday 18 April.

    confidence: determinate

Say it like this

In Baoding, Caitrī Pūrṇimā 1954 falls on Sunday 18 April. Pūrṇimā runs from 11:23 on Sat 17 Apr to 13:48 on Sun 18 Apr and covers all of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken.

ahargana.org/baoding/festivals/1954/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 18 Apr
Ahargaṇa, classicalDisc centre, no refractionSun 18 Apr
compat-drikpanchangComparison profileSun 18 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles19:23 → 21:4811:2948 min11:290 min17 Apr
Chicago21:23 → 23:4811:2748 min11:260 min17 Apr
Jersey City22:23 → 00:4811:3248 min11:320 min17 Apr
Port of Spain23:23 → 01:4811:4248 min11:420 min17 Apr
London04:23 → 06:4812:3748 min12:360 min17 Apr
Durban05:23 → 07:4811:3148 min11:310 min17 Apr
Dubai07:23 → 09:4811:5548 min11:540 min17 Apr
Delhi08:53 → 11:1811:5748 min11:570 min17 Apr
Kolkata08:53 → 11:1811:1248 min11:126 min18 Apr
Singapore10:53 → 13:1812:1048 min12:1048 min18 Apr
Sydney13:23 → 15:4811:310 min11:3048 min18 Apr
Suva15:23 → 17:4811:420 min11:4248 min18 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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