Ruling · Caitrī Pūrṇimā · 1909

Monday 5 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 449 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 Monday 5 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:57  12:45 madhyāhna ends
11:0911:3311:5712:2112:4513:0913:33

48 of 48 minutes covered

Midday of Tuesday 6 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:57  12:45 madhyāhna ends
11:0911:3311:5712:2112:4513:0913:33

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 02:13 on Mon 5 Apr to 04:28 on Tue 6 Apr.

    1909-04-04T18:12:34Z → 1909-04-05T20:28:06Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 5th, 11:57–12:45 on the 6th.

    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 5th and 0 of 48 on the 6th.

    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 26944 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 1909: Monday 5 April.

    confidence: determinate

Say it like this

In Baoding, Caitrī Pūrṇimā 1909 falls on Monday 5 April. Pūrṇimā runs from 02:13 on Mon 5 Apr to 04:28 on Tue 6 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1909/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 5 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 5 Apr
compat-drikpanchangComparison profileMon 5 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 4thCoveredMadhyāhna 5thCoveredRuled
Los Angeles10:13 → 12:2811:3248 min11:3248 min5 Apr
Chicago12:13 → 14:2811:306 min11:3048 min5 Apr
Jersey City13:13 → 15:2811:360 min11:3548 min5 Apr
Port of Spain14:13 → 16:2811:450 min11:4548 min5 Apr
London18:13 → 20:2811:400 min11:4048 min5 Apr
Durban20:13 → 22:2811:350 min11:3548 min5 Apr
Dubai21:54 → 00:0911:390 min11:3948 min5 Apr
Delhi23:43 → 01:5812:010 min12:0048 min5 Apr
Kolkata23:43 → 01:5811:160 min11:1648 min5 Apr
Singapore01:13 → 03:2811:440 min11:4448 min5 Apr
Sydney04:13 → 06:2811:340 min11:3448 min5 Apr
Suva06:08 → 08:2311:410 min11:4048 min5 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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