Ruling · Caitrī Pūrṇimā · 2006

Thursday 13 April

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 637 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 Thursday 13 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:17  12:05 madhyāhna ends
10:2910:5311:1711:4112:0512:2912:53

48 of 48 minutes covered

Midday of Friday 14 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:17  12:05 madhyāhna ends
10:2910:5311:1711:4112:0512:2912:53

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 22:54 on Wed 12 Apr to 00:40 on Fri 14 Apr.

    2006-04-12T14:53:30Z → 2006-04-13T16:40:07Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:17–12:05 on the 13th, 11:17–12:05 on the 14th.

    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 13th and 0 of 48 on the 14th.

    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 38203 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Daqing, 2006: Thursday 13 April.

    confidence: determinate

Say it like this

In Daqing, Caitrī Pūrṇimā 2006 falls on Thursday 13 April. Pūrṇimā runs from 22:54 on Wed 12 Apr to 00:40 on Fri 14 Apr and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2006/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 13 Apr
Ahargaṇa, classicalDisc centre, no refractionThu 13 Apr
compat-drikpanchangComparison profileThu 13 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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles07:54 → 09:4012:3048 min12:300 min12 Apr
Chicago09:54 → 11:4012:2848 min12:270 min12 Apr
Jersey City10:54 → 12:4012:3348 min12:337 min13 Apr
Port of Spain10:54 → 12:4011:4348 min11:4348 min13 Apr
London15:54 → 17:4012:380 min12:3848 min13 Apr
Durban16:54 → 18:4011:330 min11:3248 min13 Apr
Dubai18:54 → 20:4011:560 min11:5648 min13 Apr
Delhi20:24 → 22:1011:580 min11:5848 min13 Apr
Kolkata20:24 → 22:1011:140 min11:1348 min13 Apr
Singapore22:54 → 00:4012:410 min12:4148 min13 Apr
Sydney00:54 → 02:4011:320 min11:3248 min13 Apr
Suva02:54 → 04:4011:430 min11:4348 min13 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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