Ruling · Caitrī Pūrṇimā · 1925

Thursday 9 April

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 14 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Wednesday 8 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:19  12:07 madhyāhna ends
Pūrṇimā begins 12:36:08
10:3110:5511:1911:4312:0712:3112:55

0 of 48 minutes covered

Midday of Thursday 9 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:18  12:06 madhyāhna ends
Pūrṇimā ends 11:32:36
10:3010:5411:1811:4212:0612:3012:54

14 of 48 minutes covered, the first 14

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 12:36 on Wed 8 Apr to 11:33 on Thu 9 Apr.

    1925-04-08T04:36:09Z → 1925-04-09T03:32:37Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:19–12:07 on the 8th, 11:18–12:06 on the 9th.

    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 8th and 14 of 48 on the 9th.

    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 861 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Daqing, 1925: Thursday 9 April.

    confidence: determinate

Say it like this

In Daqing, Caitrī Pūrṇimā 1925 falls on Thursday 9 April. Pūrṇimā runs from 12:36 on Wed 8 Apr to 11:33 on Thu 9 Apr and covers 14 of 48 minutes of madhyāhna that midday.

ahargana.org/daqing/festivals/1925/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 9 Apr
Ahargaṇa, classicalDisc centre, no refractionThu 9 Apr
compat-drikpanchangComparison profileThu 9 Apr
No institution has a recorded ruling for Daqing.

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 8thCoveredMadhyāhna 9thCoveredRuled
Los Angeles20:36 → 19:3311:3148 min11:310 min8 Apr
Chicago22:36 → 21:3311:2948 min11:290 min8 Apr
Jersey City23:36 → 22:3311:3548 min11:340 min8 Apr
Port of Spain00:36 → 23:3311:4448 min11:440 min8 Apr
London04:36 → 03:3311:3948 min11:390 min8 Apr
Durban06:36 → 05:3311:3448 min11:330 min8 Apr
Dubai08:36 → 07:3311:5748 min11:570 min8 Apr
Delhi10:06 → 09:0311:5948 min11:590 min8 Apr
Kolkata10:06 → 09:0311:1548 min11:150 min8 Apr
Singapore11:36 → 10:3311:4348 min11:420 min8 Apr
Sydney14:36 → 13:3311:330 min11:3348 min9 Apr
Suva16:36 → 15:3311:440 min11:4448 min9 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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