Ruling · Śiva Śayanotsava · 2023

Sunday 2 July

Boundaryin Baoding, under the Rashtriya Panchang method. Pūrṇimā reaches pradoṣa on neither day and the rule does not say what then. Say “contested”.

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 Sunday 2 July

Taken. Pūrṇimā reaches neither evening; this is the day it falls on.

19:47 sunsetpradoṣa ends 21:00
19:2319:4720:1120:3520:5921:2321:47

0 of 73 minutes covered

Evening of Monday 3 July

Pūrṇimā is absent from pradoṣa. Not taken.

19:47 sunsetpradoṣa ends 21:00
Pūrṇimā ends 19:38:41
19:2319:4720:1120:3520:5921:2321:47

0 of 73 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 22:52 on Sun 2 Jul to 19:39 on Mon 3 Jul.

    2023-07-02T14:51:54Z → 2023-07-03T11:38:42Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:47–21:00 on the 2nd, 19:47–21:00 on the 3rd.

    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 73 minutes on the 2nd and 0 of 73 on the 3rd.

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

  4. 04

    Tie-break

    Neither evening qualifies. The day the tithi falls on is taken.

    priority: unstated → tithi-day · margin 492 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 2023: Sunday 2 July.

    confidence: boundary (absent-unstated)

Say it like this

In Baoding, Śiva Śayanotsava 2023 falls on Sunday 2 July. Pūrṇimā runs from 22:52 on Sun 2 Jul to 19:39 on Mon 3 Jul, and reaches pradoṣa on neither day.

ahargana.org/baoding/festivals/2023/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 2 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 2 Jul
compat-drikpanchangComparison profileSun 2 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 2ndCoveredSunset 3rdCoveredRuled
Los Angeles07:52 → 04:3920:0877 min20:080 min2 Jul
Chicago09:52 → 06:3920:2971 min20:290 min2 Jul
Jersey City10:52 → 07:3920:3172 min20:310 min2 Jul
Port of Spain10:52 → 07:3918:3290 min18:320 min2 Jul
London15:52 → 12:3921:2060 min21:200 min2 Jul
Durban16:52 → 13:3917:08110 min17:080 min2 Jul
Dubai18:52 → 15:3919:1383 min19:130 min2 Jul
Delhi20:22 → 17:0919:2322 min19:230 min2 Jul
Kolkata20:22 → 17:0918:250 min18:250 min2 Jul
Singapore22:52 → 19:3919:140 min19:1424 min3 Jul
Sydney00:52 → 21:3916:570 min16:58112 min3 Jul
Suva02:52 → 23:3917:420 min17:42104 min3 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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