Ruling · Caitrī Pūrṇimā · 1940

Monday 22 April

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 4 min 09 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 Sunday 21 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:53  12:41 madhyāhna ends
11:0511:2911:5312:1712:4113:0513:29

0 of 48 minutes covered

Midday of Monday 22 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:53  12:41 madhyāhna ends
Pūrṇimā ends 12:36:53
11:0511:2911:5312:1712:4113:0513:29

44 of 48 minutes covered, the first 44

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 15:57 on Sun 21 Apr to 12:37 on Mon 22 Apr.

    1940-04-21T07:57:07Z → 1940-04-22T04:36:53Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:53–12:41 on the 21st, 11:53–12:41 on the 22nd.

    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 21st and 44 of 48 on the 22nd.

    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 249 s < 300 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 1940: Monday 22 April.

    confidence: boundary (margin)

Say it like this

In Baoding, Caitrī Pūrṇimā 1940 falls on Monday 22 April. Pūrṇimā runs from 15:57 on Sun 21 Apr to 12:37 on Mon 22 Apr and covers 44 of 48 minutes of madhyāhna that midday. It is 4 min 09 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1940/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 22 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 22 Apr
compat-drikpanchangComparison profileMon 22 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 21stCoveredMadhyāhna 22ndCoveredRuled
Los Angeles23:57 → 20:3711:2848 min11:280 min21 Apr
Chicago01:57 → 22:3711:2648 min11:250 min21 Apr
Jersey City02:57 → 23:3711:3148 min11:310 min21 Apr
Port of Spain03:57 → 00:3711:4148 min11:410 min21 Apr
London08:57 → 05:3712:3648 min12:360 min21 Apr
Durban09:57 → 06:3711:3048 min11:300 min21 Apr
Dubai11:57 → 08:3711:5445 min11:530 min21 Apr
Delhi13:27 → 10:0711:560 min11:560 min22 Apr
Kolkata13:27 → 10:0711:110 min11:110 min22 Apr
Singapore15:17 → 11:5711:590 min11:590 min22 Apr
Sydney17:57 → 14:3711:300 min11:3048 min22 Apr
Suva19:57 → 16:3711:410 min11:4148 min22 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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