Ruling · Guru Pūrṇimā · 1988

Friday 29 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 35 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 Thursday 28 July

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 13:00  13:48 madhyāhna ends
12:1212:3613:0013:2413:4814:1214:36

0 of 48 minutes covered

Midday of Friday 29 July

Taken. Pūrṇimā reaches neither midday; the rule takes the second day.

madhyāhna begins 13:00  13:48 madhyāhna ends
Pūrṇimā ends 12:25:12
12:1212:3613:0013:2413:4814:1214:36

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 15:46 on Thu 28 Jul to 12:25 on Fri 29 Jul.

    1988-07-28T06:45:50Z → 1988-07-29T03:25:13Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 13:00–13:48 on the 28th, 13:00–13:48 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 0 of 48 on the 29th.

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

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: paraviddha → second-day · margin 2106 s

  5. 05

    Ruling

    Guru Pūrṇimā, Baoding, 1988: Friday 29 July.

    confidence: determinate

Say it like this

In Baoding, Guru Pūrṇimā 1988 falls on Friday 29 July. Pūrṇimā runs from 15:46 on Thu 28 Jul to 12:25 on Fri 29 Jul, and reaches madhyāhna on neither day.

ahargana.org/baoding/festivals/1988/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 29 Jul
Ahargaṇa, classicalDisc centre, no refractionFri 29 Jul
compat-drikpanchangComparison profileFri 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 Angeles23:46 → 20:2512:3548 min12:350 min28 Jul
Chicago01:46 → 22:2512:3348 min12:330 min28 Jul
Jersey City02:46 → 23:2512:3848 min12:380 min28 Jul
Port of Spain02:46 → 23:2511:4848 min11:480 min28 Jul
London07:46 → 04:2512:4248 min12:420 min28 Jul
Durban08:46 → 05:2511:3848 min11:380 min28 Jul
Dubai10:46 → 07:2512:0148 min12:010 min28 Jul
Delhi12:16 → 08:5512:0336 min12:030 min28 Jul
Kolkata12:16 → 08:5511:190 min11:190 min29 Jul
Singapore14:46 → 11:2512:470 min12:470 min29 Jul
Sydney16:46 → 13:2511:380 min11:3848 min29 Jul
Suva18:46 → 15:2511:490 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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