Ruling · Śiva Śayanotsava · 1991

Friday 26 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 189 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 25 July

Pūrṇimā is absent from pradoṣa. Not taken.

20:36 sunsetpradoṣa ends 21:53
20:1220:3621:0021:2421:4822:1222:36

0 of 77 minutes covered

Evening of Friday 26 July

Taken. The only evening Pūrṇimā reaches.

20:35 sunsetpradoṣa ends 21:53
20:1120:3520:5921:2321:4722:1122:35

77 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 01:02 on Fri 26 Jul to 03:24 on Sat 27 Jul.

    1991-07-25T16:02:12Z → 1991-07-26T18:24:21Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 20:36–21:53 on the 25th, 20:35–21:53 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 77 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 11342 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 1991: Friday 26 July.

    confidence: determinate

Say it like this

In Baoding, Śiva Śayanotsava 1991 falls on Friday 26 July. Pūrṇimā runs from 01:02 on Fri 26 Jul to 03:24 on Sat 27 Jul and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1991/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 26 Jul
Ahargaṇa, classicalDisc centre, no refractionFri 26 Jul
compat-drikpanchangComparison profileFri 26 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 Angeles09:02 → 11:2419:5980 min19:580 min25 Jul
Chicago11:02 → 13:2420:1675 min20:150 min25 Jul
Jersey City12:02 → 14:2420:1976 min20:180 min25 Jul
Port of Spain12:02 → 14:2418:3191 min18:310 min25 Jul
London17:02 → 19:2421:0066 min20:580 min25 Jul
Durban18:02 → 20:2417:1964 min17:19107 min26 Jul
Dubai20:02 → 22:2419:0730 min19:0785 min26 Jul
Delhi21:32 → 23:5419:170 min19:1683 min26 Jul
Kolkata21:32 → 23:5418:210 min18:2086 min26 Jul
Singapore00:02 → 02:2419:160 min19:1695 min26 Jul
Sydney02:02 → 04:2417:100 min17:11110 min26 Jul
Suva04:02 → 06:2417:490 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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