Ruling · Śiva Śayanotsava · 2016

Tuesday 19 July

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 621 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 Monday 18 July

Pūrṇimā is absent from pradoṣa. Not taken.

sunset 19:27  20:36 pradoṣa ends
18:3919:0319:2719:5120:1520:3921:0321:27

0 of 69 minutes covered

Evening of Tuesday 19 July

Taken. The only evening Pūrṇimā reaches.

sunset 19:26  20:35 pradoṣa ends
18:3819:0219:2619:5020:1420:3821:0221:26

70 of 70 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 07:10 on Tue 19 Jul to 06:57 on Wed 20 Jul.

    2016-07-18T23:10:23Z → 2016-07-19T22:56:35Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:27–20:36 on the 18th, 19:26–20:35 on the 19th.

    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 69 minutes on the 18th and 70 of 70 on the 19th.

    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 37272 s

  5. 05

    Ruling

    Śiva Śayanotsava, Daqing, 2016: Tuesday 19 July.

    confidence: determinate

Say it like this

In Daqing, Śiva Śayanotsava 2016 falls on Tuesday 19 July. Pūrṇimā runs from 07:10 on Tue 19 Jul to 06:57 on Wed 20 Jul and covers all of pradoṣa that evening.

ahargana.org/daqing/festivals/2016/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 19 Jul
Ahargaṇa, classicalDisc centre, no refractionTue 19 Jul
compat-drikpanchangComparison profileTue 19 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 18thCoveredSunset 19thCoveredRuled
Los Angeles16:10 → 15:5720:0379 min20:020 min18 Jul
Chicago18:10 → 17:5720:2174 min20:200 min18 Jul
Jersey City19:10 → 18:5720:2474 min20:230 min18 Jul
Port of Spain19:10 → 18:5718:3253 min18:3224 min18 Jul
London00:10 → 23:5721:070 min21:0664 min19 Jul
Durban01:10 → 00:5717:160 min17:16108 min19 Jul
Dubai03:10 → 02:5719:100 min19:1084 min19 Jul
Delhi04:40 → 04:2719:190 min19:1982 min19 Jul
Kolkata04:40 → 04:2718:230 min18:2385 min19 Jul
Singapore07:10 → 06:5719:160 min19:1695 min19 Jul
Sydney09:10 → 08:5717:060 min17:07111 min19 Jul
Suva11:10 → 10:5717:470 min17:48103 min19 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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