Ruling · Guru Pūrṇimā · 2002

Wednesday 24 July

Determinatein Riyadh, under the Rashtriya Panchang method. Clear of every threshold by 16 minutes.

Decide it for

RiyadhDelhiKolkataSingaporeSydneyJersey City

24°41′ N 46°43′ E · Asia/Riyadh · GeoNames 108410

The two middays

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

Midday of Tuesday 23 July

Qualifies with 26 of 48 minutes. Not taken.

madhyāhna begins 11:35  12:23 madhyāhna ends
Pūrṇimā begins 11:57:55
10:4711:1111:3511:5912:2312:4713:11

26 of 48 minutes covered, the last 26

Midday of Wednesday 24 July

Taken. Both middays qualify; the rule takes the second.

madhyāhna begins 11:35  12:23 madhyāhna ends
Pūrṇimā ends 12:07:00
10:4711:1111:3511:5912:2312:4713:11

32 of 48 minutes covered, the first 32

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 11:58 on Tue 23 Jul to 12:07 on Wed 24 Jul.

    2002-07-23T08:57:56Z → 2002-07-24T09:07:00Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:35–12:23 on the 23rd, 11:35–12:23 on the 24th.

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

  3. 03

    Rule

    Pūrṇimā must be present during madhyāhna. It covers 26 of 48 minutes on the 23rd and 32 of 48 on the 24th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 988 s

  5. 05

    Ruling

    Guru Pūrṇimā, Riyadh, 2002: Wednesday 24 July.

    confidence: determinate

Say it like this

In Riyadh, Guru Pūrṇimā 2002 falls on Wednesday 24 July. Pūrṇimā runs from 11:58 on Tue 23 Jul to 12:07 on Wed 24 Jul and covers 32 of 48 minutes of madhyāhna that midday. It also reaches the previous midday for 26 minutes; by the rule the second midday is taken.

ahargana.org/riyadh/festivals/2002/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 24 Jul
Ahargaṇa, classicalDisc centre, no refractionWed 24 Jul
compat-drikpanchangComparison profileWed 24 Jul
No institution has a recorded ruling for Riyadh.

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 23rdCoveredMadhyāhna 24thCoveredRuled
Los Angeles01:58 → 02:0712:3548 min12:350 min23 Jul
Chicago03:58 → 04:0712:3348 min12:330 min23 Jul
Jersey City04:58 → 05:0712:3948 min12:390 min23 Jul
Port of Spain04:58 → 05:0711:4948 min11:490 min23 Jul
London09:58 → 10:0712:4348 min12:430 min23 Jul
Durban10:58 → 11:0711:3848 min11:380 min23 Jul
Dubai12:58 → 13:0712:010 min12:0148 min24 Jul
Delhi14:28 → 14:3712:030 min12:0348 min24 Jul
Kolkata14:28 → 14:3711:190 min11:1948 min24 Jul
Singapore16:58 → 17:0712:470 min12:4748 min24 Jul
Sydney18:58 → 19:0711:380 min11:3848 min24 Jul
Suva20:58 → 21:0711:490 min11:4948 min24 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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