Ruling · Śiva Śayanotsava · 2069

Thursday 4 July

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 8 min 15 s.

Decide it for

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 Wednesday 3 July

Pūrṇimā is absent from pradoṣa. Not taken.

sunset 19:36  20:42 pradoṣa ends
Pūrṇimā begins 20:50:39
18:4819:1219:3620:0020:2420:4821:1221:36

0 of 66 minutes covered

Evening of Thursday 4 July

Taken. The only evening Pūrṇimā reaches.

sunset 19:36  20:42 pradoṣa ends
Pūrṇimā ends 21:06:05
18:4819:1219:3620:0020:2420:4821:1221:36

66 of 66 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 20:51 on Wed 3 Jul to 21:06 on Thu 4 Jul.

    2069-07-03T12:50:39Z → 2069-07-04T13:06:06Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:36–20:42 on the 3rd, 19:36–20:42 on the 4th.

    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 66 minutes on the 3rd and 66 of 66 on the 4th.

    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 495 s

  5. 05

    Ruling

    Śiva Śayanotsava, Daqing, 2069: Thursday 4 July.

    confidence: determinate

Say it like this

In Daqing, Śiva Śayanotsava 2069 falls on Thursday 4 July. Pūrṇimā runs from 20:51 on Wed 3 Jul to 21:06 on Thu 4 Jul and covers all of pradoṣa that evening.

ahargana.org/daqing/festivals/2069/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 4 Jul
Ahargaṇa, classicalDisc centre, no refractionThu 4 Jul
compat-drikpanchangComparison profileThu 4 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 3rdCoveredSunset 4thCoveredRuled
Los Angeles05:51 → 06:0620:0877 min20:080 min3 Jul
Chicago07:51 → 08:0620:2971 min20:290 min3 Jul
Jersey City08:51 → 09:0620:3172 min20:310 min3 Jul
Port of Spain08:51 → 09:0618:3290 min18:330 min3 Jul
London13:51 → 14:0621:2060 min21:190 min3 Jul
Durban14:51 → 15:0617:09110 min17:090 min3 Jul
Dubai16:51 → 17:0619:1383 min19:130 min3 Jul
Delhi18:21 → 18:3619:2381 min19:230 min3 Jul
Kolkata18:21 → 18:3618:2584 min18:2511 min3 Jul
Singapore20:51 → 21:0619:150 min19:1595 min4 Jul
Sydney22:51 → 23:0616:580 min16:59112 min4 Jul
Suva00:51 → 01:0617:430 min17:43103 min4 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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