Ruling · Śiva Śayanotsava · 1929

Sunday 21 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 251 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 Saturday 20 July

Pūrṇimā is absent from pradoṣa. Not taken.

19:40 sunsetpradoṣa ends 20:56
19:1619:4020:0420:2820:5221:1621:40

0 of 76 minutes covered

Evening of Sunday 21 July

Taken. The only evening Pūrṇimā reaches.

19:39 sunsetpradoṣa ends 20:55
19:1519:3920:0320:2720:5121:1521:39

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 01:07 on Sun 21 Jul to 03:21 on Mon 22 Jul.

    1929-07-20T17:06:33Z → 1929-07-21T19:20:38Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:40–20:56 on the 20th, 19:39–20:55 on the 21st.

    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 76 minutes on the 20th and 76 of 76 on the 21st.

    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 15048 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 1929: Sunday 21 July.

    confidence: determinate

Say it like this

In Baoding, Śiva Śayanotsava 1929 falls on Sunday 21 July. Pūrṇimā runs from 01:07 on Sun 21 Jul to 03:21 on Mon 22 Jul and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1929/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 21 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 21 Jul
compat-drikpanchangComparison profileSun 21 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 20thCoveredSunset 21stCoveredRuled
Los Angeles09:07 → 11:2119:0279 min19:020 min20 Jul
Chicago12:07 → 14:2120:2074 min20:200 min20 Jul
Jersey City13:07 → 15:2120:2375 min20:220 min20 Jul
Port of Spain13:07 → 15:2118:3291 min18:320 min20 Jul
London18:07 → 20:2121:0664 min21:050 min20 Jul
Durban19:07 → 21:2117:160 min17:16108 min21 Jul
Dubai21:07 → 23:2119:090 min19:0984 min21 Jul
Delhi22:37 → 00:5119:190 min19:1882 min21 Jul
Kolkata22:37 → 00:5118:230 min18:2286 min21 Jul
Singapore00:07 → 02:2118:160 min18:1695 min21 Jul
Sydney03:07 → 05:2117:070 min17:07110 min21 Jul
Suva05:07 → 07:2117:470 min17:48103 min21 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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