Ruling · Śiva Śayanotsava · 2087

Tuesday 15 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 392 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 Monday 14 July

Pūrṇimā is absent from pradoṣa. Not taken.

19:43 sunsetpradoṣa ends 20:58
19:1919:4320:0720:3120:5521:1921:43

0 of 75 minutes covered

Evening of Tuesday 15 July

Taken. The only evening Pūrṇimā reaches.

19:43 sunsetpradoṣa ends 20:58
19:1919:4320:0720:3120:5521:1921:43

75 of 75 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 03:30 on Tue 15 Jul to 03:56 on Wed 16 Jul.

    2087-07-14T19:30:05Z → 2087-07-15T19:55:43Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:43–20:58 on the 14th, 19:43–20:58 on the 15th.

    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 14th and 75 of 75 on the 15th.

    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 23500 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 2087: Tuesday 15 July.

    confidence: determinate

Say it like this

In Baoding, Śiva Śayanotsava 2087 falls on Tuesday 15 July. Pūrṇimā runs from 03:30 on Tue 15 Jul to 03:56 on Wed 16 Jul and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2087/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 15 Jul
Ahargaṇa, classicalDisc centre, no refractionTue 15 Jul
compat-drikpanchangComparison profileTue 15 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 14thCoveredSunset 15thCoveredRuled
Los Angeles12:30 → 12:5620:0578 min20:050 min14 Jul
Chicago14:30 → 14:5620:2473 min20:240 min14 Jul
Jersey City15:30 → 15:5620:2774 min20:260 min14 Jul
Port of Spain15:30 → 15:5618:3391 min18:330 min14 Jul
London20:30 → 20:5621:1263 min21:110 min14 Jul
Durban21:30 → 21:5617:140 min17:14109 min15 Jul
Dubai23:30 → 23:5619:120 min19:1184 min15 Jul
Delhi01:00 → 01:2619:210 min19:2182 min15 Jul
Kolkata01:00 → 01:2618:240 min18:2485 min15 Jul
Singapore03:30 → 03:5619:160 min19:1695 min15 Jul
Sydney05:30 → 05:5617:040 min17:05111 min15 Jul
Suva07:30 → 07:5617:460 min17:47103 min15 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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