Ruling · Śiva Śayanotsava · 1999

Tuesday 27 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 8 min 50 s.

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 Tuesday 27 July

Taken. The only evening Pūrṇimā reaches.

19:34 sunsetpradoṣa ends 20:52
19:1019:3419:5820:2220:4621:1021:34

77 of 77 minutes covered

Evening of Wednesday 28 July

Pūrṇimā is absent from pradoṣa. Not taken.

19:34 sunsetpradoṣa ends 20:51
Pūrṇimā ends 19:24:46
19:1019:3419:5820:2220:4621:1021:34

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 18:22 on Tue 27 Jul to 19:25 on Wed 28 Jul.

    1999-07-27T10:22:07Z → 1999-07-28T11:24:47Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:34–20:52 on the 27th, 19:34–20:51 on the 28th.

    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 27th and 0 of 78 on the 28th.

    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 530 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 1999: Tuesday 27 July.

    confidence: determinate

Say it like this

In Baoding, Śiva Śayanotsava 1999 falls on Tuesday 27 July. Pūrṇimā runs from 18:22 on Tue 27 Jul to 19:25 on Wed 28 Jul and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1999/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 27 Jul
Ahargaṇa, classicalDisc centre, no refractionTue 27 Jul
compat-drikpanchangComparison profileTue 27 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 27thCoveredSunset 28thCoveredRuled
Los Angeles03:22 → 04:2519:5881 min19:570 min27 Jul
Chicago05:22 → 06:2520:1476 min20:130 min27 Jul
Jersey City06:22 → 07:2520:1776 min20:160 min27 Jul
Port of Spain06:22 → 07:2518:3191 min18:310 min27 Jul
London11:22 → 12:2520:5767 min20:550 min27 Jul
Durban12:22 → 13:2517:20107 min17:210 min27 Jul
Dubai14:22 → 15:2519:0785 min19:060 min27 Jul
Delhi15:52 → 16:5519:1583 min19:150 min27 Jul
Kolkata15:52 → 16:5518:2086 min18:200 min27 Jul
Singapore18:22 → 19:2519:1695 min19:169 min27 Jul
Sydney20:22 → 21:2517:110 min17:12109 min28 Jul
Suva22:22 → 23:2517:500 min17:50102 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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