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Ruling · 1942 · Daqing

Guru Pūrṇimā

Monday 27 July1942 · Daqing, Heilongjiang, China

Determinatemargin 284 min

In Daqing, under the Rashtriya Panchang method. Clear of every threshold by 284 minutes.

Decide it forDaqingDelhiKolkataSingaporeSydneyJersey City46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays मध्याह्न

One ghaṭī is 24 minutes

Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Monday 27 July

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 12:22  13:10 madhyāhna ends
11:3411:5812:2212:4613:1013:3413:58

48 of 48 minutes covered

Midday of Tuesday 28 July

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 12:22  13:10 madhyāhna ends
11:3411:5812:2212:4613:1013:3413:58

0 of 48 minutes covered

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

How it was decided निर्णय

  1. Step 1, Aṅga

    Pūrṇimā runs from 07:38 on Mon 27 Jul to 04:14 on Tue 28 Jul.

    1942-07-26T22:37:54Z → 1942-07-27T19:13:38Z
  2. Step 2, Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:22–13:10 on the 27th, 12:22–13:10 on the 28th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
  3. Step 3, Rule

    Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 27th and 0 of 48 on the 28th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102
  4. Step 4, Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 17048 s
  5. Step 5, Ruling

    Guru Pūrṇimā, Daqing, 1942: Monday 27 July.

    confidence: determinate

Say it like this

In Daqing, Guru Pūrṇimā 1942 falls on Monday 27 July. Pūrṇimā runs from 07:38 on Mon 27 Jul to 04:14 on Tue 28 Jul and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1942/guru-purnimapac-rp@2026.1

Who says what

never edited to agree

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 27 Jul
Ahargaṇa, classicalDisc centre, no refractionMon 27 Jul
compat-drikpanchangComparison profileMon 27 Jul
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/guru-purnima · ruleset 2026.3-draft

Month
Āṣāḍha, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 102

S 15 Guru purnima (paraviddha), Vyasa puja (paraviddha, 3 muhurtas after sunrise), Kokila vrata (sayahna vyapini). Siva sayanotsava (pradosavyapini). Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

twelve places, west to east · local clocks

PlacePūrṇimāMadhyāhna 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles15:38 → 12:1412:350 min12:350 min27 Jul
Chicago17:38 → 14:1412:330 min12:3348 min27 Jul
Jersey City18:38 → 15:1412:380 min12:3848 min27 Jul
Port of Spain19:38 → 16:1412:480 min12:4848 min27 Jul
London00:38 → 21:1413:420 min13:4248 min27 Jul
Durban00:38 → 21:1411:380 min11:3848 min27 Jul
Dubai02:38 → 23:1412:010 min12:0148 min27 Jul
Delhi04:08 → 00:4412:030 min12:0348 min27 Jul
Kolkata04:08 → 00:4411:190 min11:1948 min27 Jul
Singapore07:38 → 04:1413:470 min13:4748 min27 Jul
Sydney08:38 → 05:1411:380 min11:3848 min27 Jul
Suva10:38 → 07:1411:490 min11:4948 min27 Jul
This ruling as JSON · ICS
Profile · tradition
pac-rp@2026.1 · smarta
Rule
guru-purnima@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s