Ruling · Guru Pūrṇimā · 1980

Sunday 27 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 Sunday 27 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 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

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul.

    1980-07-26T20:43:16Z → 1980-07-27T18:53:38Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 27th, 12:00–12:48 on the 28th.

    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 27th and 0 of 48 on the 28th.

    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 26223 s

  5. 05

    Ruling

    Guru Pūrṇimā, Baoding, 1980: Sunday 27 July.

    confidence: determinate

Say it like this

In Baoding, Guru Pūrṇimā 1980 falls on Sunday 27 July. Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1980/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 27 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 27 Jul
compat-drikpanchangComparison profileSun 27 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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles13:43 → 11:5412:350 min12:350 min27 Jul
Chicago15:43 → 13:5412:330 min12:3348 min27 Jul
Jersey City16:43 → 14:5412:380 min12:3848 min27 Jul
Port of Spain16:43 → 14:5411:480 min11:4848 min27 Jul
London21:43 → 19:5412:420 min12:4248 min27 Jul
Durban22:43 → 20:5411:380 min11:3848 min27 Jul
Dubai00:43 → 22:5412:010 min12:0148 min27 Jul
Delhi02:13 → 00:2412:030 min12:0348 min27 Jul
Kolkata02:13 → 00:2411:190 min11:1948 min27 Jul
Singapore04:13 → 02:2412:170 min12:1748 min27 Jul
Sydney06:43 → 04:5411:380 min11:3848 min27 Jul
Suva08:43 → 06:5411:490 min11:4948 min27 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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