Ruling · Guru Pūrṇimā · 1975

Wednesday 23 July

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 19 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Tuesday 22 July

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:22  12:10 madhyāhna ends
Pūrṇimā begins 12:29:08
10:3410:5811:2211:4612:1012:3412:58

0 of 48 minutes covered

Midday of Wednesday 23 July

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:22  12:10 madhyāhna ends
10:3410:5811:2211:4612:1012:3412:58

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 12:29 on Tue 22 Jul to 13:28 on Wed 23 Jul.

    1975-07-22T04:29:09Z → 1975-07-23T05:28:27Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:22–12:10 on the 22nd, 11:22–12:10 on the 23rd.

    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 22nd and 48 of 48 on the 23rd.

    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 1147 s

  5. 05

    Ruling

    Guru Pūrṇimā, Daqing, 1975: Wednesday 23 July.

    confidence: determinate

Say it like this

In Daqing, Guru Pūrṇimā 1975 falls on Wednesday 23 July. Pūrṇimā runs from 12:29 on Tue 22 Jul to 13:28 on Wed 23 Jul and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1975/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 23 Jul
Ahargaṇa, classicalDisc centre, no refractionWed 23 Jul
compat-drikpanchangComparison profileWed 23 Jul
No institution has a recorded ruling for Daqing.

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 22ndCoveredMadhyāhna 23rdCoveredRuled
Los Angeles21:29 → 22:2812:3548 min12:350 min22 Jul
Chicago23:29 → 00:2812:3348 min12:330 min22 Jul
Jersey City00:29 → 01:2812:3848 min12:380 min22 Jul
Port of Spain00:29 → 01:2811:4848 min11:480 min22 Jul
London05:29 → 06:2812:4248 min12:420 min22 Jul
Durban06:29 → 07:2811:3848 min11:380 min22 Jul
Dubai08:29 → 09:2812:0148 min12:010 min22 Jul
Delhi09:59 → 10:5812:0348 min12:030 min22 Jul
Kolkata09:59 → 10:5811:1948 min11:190 min22 Jul
Singapore11:59 → 12:5812:1748 min12:1741 min23 Jul
Sydney14:29 → 15:2811:380 min11:3848 min23 Jul
Suva16:29 → 17:2811:490 min11:4948 min23 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

About Ahargaṇa