Ruling · Guru Pūrṇimā · 1931

Wednesday 29 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 437 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Tuesday 28 July

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 12:00  12:48 madhyāhna ends
11:1211:3612:0012:2412:4813:1213:36

0 of 48 minutes covered

Midday of Wednesday 29 July

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 12:00  12:48 madhyāhna ends
11:1211:3612:0012:2412:4813:1213:36

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 20:05 on Tue 28 Jul to 20:47 on Wed 29 Jul.

    1931-07-28T12:05:18Z → 1931-07-29T12:47:26Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 28th, 12:00–12:48 on the 29th.

    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 28th and 48 of 48 on the 29th.

    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 26222 s

  5. 05

    Ruling

    Guru Pūrṇimā, Baoding, 1931: Wednesday 29 July.

    confidence: determinate

Say it like this

In Baoding, Guru Pūrṇimā 1931 falls on Wednesday 29 July. Pūrṇimā runs from 20:05 on Tue 28 Jul to 20:47 on Wed 29 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1931/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 29 Jul
Ahargaṇa, classicalDisc centre, no refractionWed 29 Jul
compat-drikpanchangComparison profileWed 29 Jul
No institution has a recorded ruling for Baoding.

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 28thCoveredMadhyāhna 29thCoveredRuled
Los Angeles04:05 → 04:4711:3548 min11:350 min28 Jul
Chicago07:05 → 07:4712:3348 min12:330 min28 Jul
Jersey City08:05 → 08:4712:3848 min12:380 min28 Jul
Port of Spain08:05 → 08:4711:4848 min11:480 min28 Jul
London13:05 → 13:4712:4225 min12:4248 min29 Jul
Durban14:05 → 14:4711:380 min11:3848 min29 Jul
Dubai16:05 → 16:4712:010 min12:0148 min29 Jul
Delhi17:35 → 18:1712:030 min12:0348 min29 Jul
Kolkata17:35 → 18:1711:190 min11:1948 min29 Jul
Singapore19:05 → 19:4711:470 min11:4748 min29 Jul
Sydney22:05 → 22:4711:380 min11:3848 min29 Jul
Suva00:05 → 00:4711:490 min11:4948 min29 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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