Ruling · Śiva Śayanotsava · 2067

Monday 25 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 Monday 25 July

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

19:36 sunsetpradoṣa ends 20:53
19:1219:3620:0020:2420:4821:1221:36

0 of 77 minutes covered

Evening of Tuesday 26 July

Pūrṇimā is absent from pradoṣa. Not taken.

19:35 sunsetpradoṣa ends 20:52
19:1119:3519:5920:2320:4721:1121:35

0 of 77 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 21:47 on Mon 25 Jul to 17:59 on Tue 26 Jul.

    2067-07-25T13:46:59Z → 2067-07-26T09:59:25Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:36–20:53 on the 25th, 19:35–20:52 on the 26th.

    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 77 minutes on the 25th and 0 of 77 on the 26th.

    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 3234 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 2067: Monday 25 July.

    confidence: boundary (absent-unstated)

Say it like this

In Baoding, Śiva Śayanotsava 2067 falls on Monday 25 July. Pūrṇimā runs from 21:47 on Mon 25 Jul to 17:59 on Tue 26 Jul, and reaches pradoṣa on neither day.

ahargana.org/baoding/festivals/2067/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 25 Jul
Ahargaṇa, classicalDisc centre, no refractionMon 25 Jul
compat-drikpanchangComparison profileMon 25 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 25thCoveredSunset 26thCoveredRuled
Los Angeles06:47 → 02:5919:5980 min19:580 min25 Jul
Chicago08:47 → 04:5920:1675 min20:150 min25 Jul
Jersey City09:47 → 05:5920:1876 min20:180 min25 Jul
Port of Spain09:47 → 05:5918:3291 min18:310 min25 Jul
London14:47 → 10:5920:5966 min20:580 min25 Jul
Durban15:47 → 11:5917:20107 min17:200 min25 Jul
Dubai17:47 → 13:5919:0785 min19:070 min25 Jul
Delhi19:17 → 15:2919:1683 min19:160 min25 Jul
Kolkata19:17 → 15:2918:2130 min18:200 min25 Jul
Singapore21:47 → 17:5919:170 min19:170 min25 Jul
Sydney23:47 → 19:5917:110 min17:11109 min26 Jul
Suva01:47 → 21:5917:500 min17:50102 min26 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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