Ruling · Guru Pūrṇimā · 1908

Monday 13 July

Determinatein Luanda, under the Rashtriya Panchang method. Clear of every threshold by 582 minutes.

Decide it for

LuandaDelhiKolkataSingaporeSydneyJersey City

8°50′ S 13°14′ E · Africa/Luanda · GeoNames 2240449

The two middays

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

Midday of Monday 13 July

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:02  11:50 madhyāhna ends
10:1410:3811:0211:2611:5012:1412:38

48 of 48 minutes covered

Midday of Tuesday 14 July

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:02  11:50 madhyāhna ends
10:1410:3811:0211:2611:5012:1412:38

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 01:19 on Mon 13 Jul to 22:01 on Mon 13 Jul.

    1908-07-13T01:06:06Z → 1908-07-13T21:47:43Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:02–11:50 on the 13th, 11:02–11:50 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 34947 s

  5. 05

    Ruling

    Guru Pūrṇimā, Luanda, 1908: Monday 13 July.

    confidence: determinate

Say it like this

In Luanda, Guru Pūrṇimā 1908 falls on Monday 13 July. Pūrṇimā runs from 01:19 on Mon 13 Jul to 22:01 on Mon 13 Jul and covers all of madhyāhna that midday.

ahargana.org/luanda/festivals/1908/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 13 Jul
Ahargaṇa, classicalDisc centre, no refractionMon 13 Jul
compat-drikpanchangComparison profileMon 13 Jul
No institution has a recorded ruling for Luanda.

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 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles17:06 → 13:4811:3448 min11:340 min13 Jul
Chicago19:06 → 15:4811:3248 min11:320 min13 Jul
Jersey City20:06 → 16:4811:3848 min11:380 min13 Jul
Port of Spain21:06 → 17:4811:4848 min11:480 min13 Jul
London01:06 → 21:4811:4248 min11:420 min13 Jul
Durban03:06 → 23:4811:3748 min11:380 min13 Jul
Dubai04:47 → 01:2911:4148 min11:410 min13 Jul
Delhi06:36 → 03:1812:0248 min12:030 min13 Jul
Kolkata06:36 → 03:1811:1848 min11:180 min13 Jul
Singapore08:06 → 04:4811:4648 min11:460 min13 Jul
Sydney11:06 → 07:4811:3748 min11:370 min13 Jul
Suva13:01 → 09:4311:430 min11:430 min14 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

About Ahargaṇa