Ruling · Guru Pūrṇimā · 2000

Sunday 16 July

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 432 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 Saturday 15 July

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:22  12:10 madhyāhna ends
10:3410:5811:2211:4612:1012:3412:58

0 of 48 minutes covered

Midday of Sunday 16 July

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:22  12:10 madhyāhna ends
10:3410:5811:2211:4612:1012:3412:58

48 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 19:22 on Sat 15 Jul to 21:55 on Sun 16 Jul.

    2000-07-15T11:22:05Z → 2000-07-16T13:55:13Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:22–12:10 on the 15th, 11:22–12:10 on the 16th.

    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 15th and 48 of 48 on the 16th.

    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 25946 s

  5. 05

    Ruling

    Guru Pūrṇimā, Daqing, 2000: Sunday 16 July.

    confidence: determinate

Say it like this

In Daqing, Guru Pūrṇimā 2000 falls on Sunday 16 July. Pūrṇimā runs from 19:22 on Sat 15 Jul to 21:55 on Sun 16 Jul and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2000/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 16 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 16 Jul
compat-drikpanchangComparison profileSun 16 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 clock times.

PlacePūrṇimāMadhyāhna 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles04:22 → 06:5512:3548 min12:350 min15 Jul
Chicago06:22 → 08:5512:3248 min12:320 min15 Jul
Jersey City07:22 → 09:5512:3848 min12:380 min15 Jul
Port of Spain07:22 → 09:5511:4848 min11:480 min15 Jul
London12:22 → 14:5512:4248 min12:4248 min16 Jul
Durban13:22 → 15:5511:380 min11:3848 min16 Jul
Dubai15:22 → 17:5512:010 min12:0148 min16 Jul
Delhi16:52 → 19:2512:030 min12:0348 min16 Jul
Kolkata16:52 → 19:2511:180 min11:1948 min16 Jul
Singapore19:22 → 21:5512:470 min12:4748 min16 Jul
Sydney21:22 → 23:5511:370 min11:3748 min16 Jul
Suva23:22 → 01:5511:480 min11:4848 min16 Jul
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

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