Ruling · Guru Pūrṇimā · 2015

Friday 31 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 355 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 30 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 Friday 31 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 21:31 on Thu 30 Jul to 18:43 on Fri 31 Jul.

    2015-07-30T13:30:51Z → 2015-07-31T10:42:54Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 30th, 12:00–12:48 on the 31st.

    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 30th and 48 of 48 on the 31st.

    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 21277 s

  5. 05

    Ruling

    Guru Pūrṇimā, Baoding, 2015: Friday 31 July.

    confidence: determinate

Say it like this

In Baoding, Guru Pūrṇimā 2015 falls on Friday 31 July. Pūrṇimā runs from 21:31 on Thu 30 Jul to 18:43 on Fri 31 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2015/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 31 Jul
Ahargaṇa, classicalDisc centre, no refractionFri 31 Jul
compat-drikpanchangComparison profileFri 31 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 30thCoveredMadhyāhna 31stCoveredRuled
Los Angeles06:31 → 03:4312:3548 min12:350 min30 Jul
Chicago08:31 → 05:4312:3348 min12:330 min30 Jul
Jersey City09:31 → 06:4312:3848 min12:380 min30 Jul
Port of Spain09:31 → 06:4311:4848 min11:480 min30 Jul
London14:31 → 11:4312:420 min12:420 min31 Jul
Durban15:31 → 12:4311:380 min11:3848 min31 Jul
Dubai17:31 → 14:4312:010 min12:0148 min31 Jul
Delhi19:01 → 16:1312:030 min12:0348 min31 Jul
Kolkata19:01 → 16:1311:190 min11:1948 min31 Jul
Singapore21:31 → 18:4312:470 min12:4748 min31 Jul
Sydney23:31 → 20:4311:380 min11:3848 min31 Jul
Suva01:31 → 22:4311:490 min11:4948 min31 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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