Ruling · Śiva Śayanotsava · 1970

Saturday 18 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 422 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two evenings

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

Evening of Friday 17 July

Pūrṇimā is absent from pradoṣa. Not taken.

19:42 sunsetpradoṣa ends 20:57
19:1819:4220:0620:3020:5421:1821:42

0 of 75 minutes covered

Evening of Saturday 18 July

Taken. The only evening Pūrṇimā reaches.

19:41 sunsetpradoṣa ends 20:57
19:1719:4120:0520:2920:5321:1721:41

76 of 76 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 07:24 on Sat 18 Jul to 03:58 on Sun 19 Jul.

    1970-07-17T23:24:05Z → 1970-07-18T19:58:28Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:42–20:57 on the 17th, 19:41–20:57 on the 18th.

    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 75 minutes on the 17th and 76 of 76 on the 18th.

    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 25308 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 1970: Saturday 18 July.

    confidence: determinate

Say it like this

In Baoding, Śiva Śayanotsava 1970 falls on Saturday 18 July. Pūrṇimā runs from 07:24 on Sat 18 Jul to 03:58 on Sun 19 Jul and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1970/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 18 Jul
Ahargaṇa, classicalDisc centre, no refractionSat 18 Jul
compat-drikpanchangComparison profileSat 18 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/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 17thCoveredSunset 18thCoveredRuled
Los Angeles16:24 → 12:5820:0479 min20:030 min17 Jul
Chicago18:24 → 14:5820:2373 min20:220 min17 Jul
Jersey City19:24 → 15:5820:2574 min20:240 min17 Jul
Port of Spain19:24 → 15:5818:3239 min18:320 min17 Jul
London00:24 → 20:5821:090 min21:080 min17 Jul
Durban01:24 → 21:5817:140 min17:15109 min18 Jul
Dubai03:24 → 23:5819:100 min19:1084 min18 Jul
Delhi04:54 → 01:2819:200 min19:2082 min18 Jul
Kolkata04:54 → 01:2818:230 min18:2385 min18 Jul
Singapore06:54 → 03:2818:460 min18:4695 min18 Jul
Sydney09:24 → 05:5817:050 min17:05111 min18 Jul
Suva11:24 → 07:5817:470 min17:47103 min18 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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