Ruling · Guru Pūrṇimā · 1929

Sunday 21 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 520 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 Sunday 21 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

Midday of Monday 22 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

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 01:07 on Sun 21 Jul to 03:21 on Mon 22 Jul.

    1929-07-20T17:06:33Z → 1929-07-21T19:20:38Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 21st, 12:00–12:48 on the 22nd.

    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 21st and 0 of 48 on the 22nd.

    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 31172 s

  5. 05

    Ruling

    Guru Pūrṇimā, Baoding, 1929: Sunday 21 July.

    confidence: determinate

Say it like this

In Baoding, Guru Pūrṇimā 1929 falls on Sunday 21 July. Pūrṇimā runs from 01:07 on Sun 21 Jul to 03:21 on Mon 22 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1929/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 21 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 21 Jul
compat-drikpanchangComparison profileSun 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles09:07 → 11:2111:3548 min11:350 min20 Jul
Chicago12:07 → 14:2112:3348 min12:3348 min21 Jul
Jersey City13:07 → 15:2112:3820 min12:3848 min21 Jul
Port of Spain13:07 → 15:2111:480 min11:4848 min21 Jul
London18:07 → 20:2112:420 min12:4248 min21 Jul
Durban19:07 → 21:2111:380 min11:3848 min21 Jul
Dubai21:07 → 23:2112:010 min12:0148 min21 Jul
Delhi22:37 → 00:5112:030 min12:0348 min21 Jul
Kolkata22:37 → 00:5111:190 min11:1948 min21 Jul
Singapore00:07 → 02:2111:470 min11:4748 min21 Jul
Sydney03:07 → 05:2111:370 min11:3748 min21 Jul
Suva05:07 → 07:2111:480 min11:4948 min21 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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