Ruling · Caitrī Pūrṇimā · 1979

Thursday 12 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 455 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 Wednesday 11 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:56  12:44 madhyāhna ends
11:0811:3211:5612:2012:4413:0813:32

0 of 48 minutes covered

Midday of Thursday 12 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:55  12:43 madhyāhna ends
11:0711:3111:5512:1912:4313:0713:31

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 20:19 on Wed 11 Apr to 21:15 on Thu 12 Apr.

    1979-04-11T12:18:39Z → 1979-04-12T13:15:01Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 11th, 11:55–12:43 on the 12th.

    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 11th and 48 of 48 on the 12th.

    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 27294 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 1979: Thursday 12 April.

    confidence: determinate

Say it like this

In Baoding, Caitrī Pūrṇimā 1979 falls on Thursday 12 April. Pūrṇimā runs from 20:19 on Wed 11 Apr to 21:15 on Thu 12 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1979/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 12 Apr
Ahargaṇa, classicalDisc centre, no refractionThu 12 Apr
compat-drikpanchangComparison profileThu 12 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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles04:19 → 05:1511:3048 min11:300 min11 Apr
Chicago06:19 → 07:1511:2848 min11:280 min11 Apr
Jersey City07:19 → 08:1511:3448 min11:340 min11 Apr
Port of Spain08:19 → 09:1511:4348 min11:430 min11 Apr
London13:19 → 14:1512:388 min12:3848 min12 Apr
Durban14:19 → 15:1511:330 min11:3348 min12 Apr
Dubai16:19 → 17:1511:560 min11:5648 min12 Apr
Delhi17:49 → 18:4511:590 min11:5848 min12 Apr
Kolkata17:49 → 18:4511:140 min11:1448 min12 Apr
Singapore19:49 → 20:4512:120 min12:1248 min12 Apr
Sydney22:19 → 23:1511:320 min11:3248 min12 Apr
Suva00:19 → 01:1511:440 min11:4348 min12 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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