Ruling · Guru Pūrṇimā · 1917

Wednesday 4 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 208 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 Wednesday 4 July

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:58  12:46 madhyāhna ends
11:1011:3411:5812:2212:4613:1013:34

48 of 48 minutes covered

Midday of Thursday 5 July

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:58  12:46 madhyāhna ends
11:1011:3411:5812:2212:4613:1013:34

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 08:31 on Wed 4 Jul to 05:40 on Thu 5 Jul.

    1917-07-04T00:30:33Z → 1917-07-04T21:40:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 4th, 11:58–12:46 on the 5th.

    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 4th and 0 of 48 on the 5th.

    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 12452 s

  5. 05

    Ruling

    Guru Pūrṇimā, Baoding, 1917: Wednesday 4 July.

    confidence: determinate

Say it like this

In Baoding, Guru Pūrṇimā 1917 falls on Wednesday 4 July. Pūrṇimā runs from 08:31 on Wed 4 Jul to 05:40 on Thu 5 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1917/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 4 Jul
Ahargaṇa, classicalDisc centre, no refractionWed 4 Jul
compat-drikpanchangComparison profileWed 4 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 4thCoveredMadhyāhna 5thCoveredRuled
Los Angeles16:31 → 13:4011:3348 min11:330 min4 Jul
Chicago18:31 → 15:4011:3148 min11:310 min4 Jul
Jersey City19:31 → 16:4011:3648 min11:360 min4 Jul
Port of Spain20:31 → 17:4011:4648 min11:460 min4 Jul
London01:31 → 22:4012:4048 min12:410 min4 Jul
Durban02:31 → 23:4011:3648 min11:360 min4 Jul
Dubai04:12 → 01:2111:4048 min11:400 min4 Jul
Delhi06:01 → 03:1012:0148 min12:010 min4 Jul
Kolkata06:01 → 03:1011:1748 min11:170 min4 Jul
Singapore07:31 → 04:4011:4548 min11:450 min4 Jul
Sydney10:31 → 07:4011:3548 min11:350 min4 Jul
Suva12:31 → 09:4011:464 min11:470 min4 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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