Ruling · Śiva Śayanotsava · 1988

Thursday 28 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 287 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 Thursday 28 July

Taken. The only evening Pūrṇimā reaches.

20:33 sunsetpradoṣa ends 21:51
20:0920:3320:5721:2121:4522:0922:33

78 of 78 minutes covered

Evening of Friday 29 July

Pūrṇimā is absent from pradoṣa. Not taken.

20:32 sunsetpradoṣa ends 21:50
20:0820:3220:5621:2021:4422:0822:32

0 of 78 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 15:46 on Thu 28 Jul to 12:25 on Fri 29 Jul.

    1988-07-28T06:45:50Z → 1988-07-29T03:25:13Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 20:33–21:51 on the 28th, 20:32–21:50 on the 29th.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 78 of 78 minutes on the 28th and 0 of 78 on the 29th.

    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 17231 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 1988: Thursday 28 July.

    confidence: determinate

Say it like this

In Baoding, Śiva Śayanotsava 1988 falls on Thursday 28 July. Pūrṇimā runs from 15:46 on Thu 28 Jul to 12:25 on Fri 29 Jul and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1988/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 28 Jul
Ahargaṇa, classicalDisc centre, no refractionThu 28 Jul
compat-drikpanchangComparison profileThu 28 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 28thCoveredSunset 29thCoveredRuled
Los Angeles23:46 → 20:2519:5629 min19:560 min28 Jul
Chicago01:46 → 22:2520:1276 min20:110 min28 Jul
Jersey City02:46 → 23:2520:1577 min20:140 min28 Jul
Port of Spain02:46 → 23:2518:3191 min18:300 min28 Jul
London07:46 → 04:2520:5467 min20:530 min28 Jul
Durban08:46 → 05:2517:21107 min17:220 min28 Jul
Dubai10:46 → 07:2519:0685 min19:050 min28 Jul
Delhi12:16 → 08:5519:1484 min19:140 min28 Jul
Kolkata12:16 → 08:5518:1986 min18:190 min28 Jul
Singapore14:46 → 11:2519:1695 min19:160 min28 Jul
Sydney16:46 → 13:2517:13109 min17:130 min28 Jul
Suva18:46 → 15:2517:5047 min17:510 min28 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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