Ruling · Śiva Śayanotsava · 1933

Friday 7 July

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 16 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

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

The two evenings

One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.

Evening of Thursday 6 July

Pūrṇimā is absent from pradoṣa. Not taken.

sunset 19:35  20:42 pradoṣa ends
18:4719:1119:3519:5920:2320:4721:1121:35

0 of 67 minutes covered

Evening of Friday 7 July

Taken. The only evening Pūrṇimā reaches.

sunset 19:35  20:41 pradoṣa ends
Pūrṇimā ends 19:50:28
18:4719:1119:3519:5920:2320:4721:1121:35

16 of 67 minutes covered, the first 16

Pūrṇimā presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 23:32 on Thu 6 Jul to 19:50 on Fri 7 Jul.

    1933-07-06T15:32:25Z → 1933-07-07T11:50:29Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:35–20:42 on the 6th, 19:35–20:41 on the 7th.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 0 of 67 minutes on the 6th and 16 of 67 on the 7th.

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

  4. 04

    Tie-break

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 949 s

  5. 05

    Ruling

    Śiva Śayanotsava, Daqing, 1933: Friday 7 July.

    confidence: determinate

Say it like this

In Daqing, Śiva Śayanotsava 1933 falls on Friday 7 July. Pūrṇimā runs from 23:32 on Thu 6 Jul to 19:50 on Fri 7 Jul and covers 16 of 67 minutes of pradoṣa that evening.

ahargana.org/daqing/festivals/1933/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 7 Jul
Ahargaṇa, classicalDisc centre, no refractionFri 7 Jul
compat-drikpanchangComparison profileFri 7 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/shiva-shayanotsava · ruleset 2026.3-draft

Month
Āṣāḍha, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Pradoṣa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
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.

PlacePūrṇimāSunset 6thCoveredSunset 7thCoveredRuled
Los Angeles07:32 → 03:5019:0777 min19:070 min6 Jul
Chicago10:32 → 06:5020:2871 min20:280 min6 Jul
Jersey City11:32 → 07:5020:3072 min20:300 min6 Jul
Port of Spain11:32 → 07:5018:3290 min18:320 min6 Jul
London16:32 → 12:5021:1860 min21:180 min6 Jul
Durban17:32 → 13:5017:0986 min17:090 min6 Jul
Dubai19:32 → 15:5019:1263 min19:120 min6 Jul
Delhi21:02 → 17:2019:220 min19:220 min6 Jul
Kolkata21:02 → 17:2018:250 min18:250 min6 Jul
Singapore22:52 → 19:1018:350 min18:3536 min7 Jul
Sydney01:32 → 21:5016:590 min16:59112 min7 Jul
Suva03:32 → 23:5017:430 min17:43103 min7 Jul
Profile · tradition
pac-rp@2026.1 · smarta
Rule
shiva-shayanotsava@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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