Ruling · Guru Pūrṇimā · 1979

Monday 9 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 298 minutes.

Decide it for

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 Monday 9 July

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:59  12:47 madhyāhna ends
11:1111:3511:5912:2312:4713:1113:35

48 of 48 minutes covered

Midday of Tuesday 10 July

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:59  12:47 madhyāhna ends
11:1111:3511:5912:2312:4713:1113:35

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 07:01 on Mon 9 Jul to 03:59 on Tue 10 Jul.

    1979-07-08T23:01:12Z → 1979-07-09T19:59:15Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 9th, 11:59–12:47 on the 10th.

    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 9th and 0 of 48 on the 10th.

    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 17870 s

  5. 05

    Ruling

    Guru Pūrṇimā, Baoding, 1979: Monday 9 July.

    confidence: determinate

Say it like this

In Baoding, Guru Pūrṇimā 1979 falls on Monday 9 July. Pūrṇimā runs from 07:01 on Mon 9 Jul to 03:59 on Tue 10 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1979/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 9 Jul
Ahargaṇa, classicalDisc centre, no refractionMon 9 Jul
compat-drikpanchangComparison profileMon 9 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 8thCoveredMadhyāhna 9thCoveredRuled
Los Angeles16:01 → 12:5912:340 min12:3425 min9 Jul
Chicago18:01 → 14:5912:310 min12:3248 min9 Jul
Jersey City19:01 → 15:5912:370 min12:3748 min9 Jul
Port of Spain19:01 → 15:5911:470 min11:4748 min9 Jul
London00:01 → 20:5912:410 min12:4148 min9 Jul
Durban01:01 → 21:5911:370 min11:3748 min9 Jul
Dubai03:01 → 23:5912:000 min12:0048 min9 Jul
Delhi04:31 → 01:2912:020 min12:0248 min9 Jul
Kolkata04:31 → 01:2911:170 min11:1848 min9 Jul
Singapore06:31 → 03:2912:150 min12:1648 min9 Jul
Sydney09:01 → 05:5911:360 min11:3648 min9 Jul
Suva11:01 → 07:5911:470 min11:4748 min9 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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