Ruling · Śiva Śayanotsava · 2010

Sunday 25 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 599 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 Sunday 25 July

Taken. The only evening Pūrṇimā reaches.

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

77 of 77 minutes covered

Evening of Monday 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 07:42 on Sun 25 Jul to 09:37 on Mon 26 Jul.

    2010-07-24T23:42:13Z → 2010-07-26T01:36:33Z

  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 77 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

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 35912 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 2010: Sunday 25 July.

    confidence: determinate

Say it like this

In Baoding, Śiva Śayanotsava 2010 falls on Sunday 25 July. Pūrṇimā runs from 07:42 on Sun 25 Jul to 09:37 on Mon 26 Jul and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2010/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 25 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 25 Jul
compat-drikpanchangComparison profileSun 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 24thCoveredSunset 26thCoveredRuled
Los Angeles16:42 → 18:3720:0080 min19:580 min24 Jul
Chicago18:42 → 20:3720:1775 min20:150 min24 Jul
Jersey City19:42 → 21:3720:1976 min20:180 min25 Jul
Port of Spain19:42 → 21:3718:3120 min18:310 min25 Jul
London00:42 → 02:3721:000 min20:580 min25 Jul
Durban01:42 → 03:3717:190 min17:200 min25 Jul
Dubai03:42 → 05:3719:080 min19:070 min25 Jul
Delhi05:12 → 07:0719:170 min19:160 min25 Jul
Kolkata05:12 → 07:0718:210 min18:200 min25 Jul
Singapore07:42 → 09:3719:160 min19:160 min25 Jul
Sydney09:42 → 11:3717:100 min17:110 min25 Jul
Suva11:42 → 13:3717:490 min17:500 min25 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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