Ruling · Śiva Śayanotsava · 1997

Saturday 19 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 325 minutes.

Decide it for

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 19 July

Taken. The only evening Pūrṇimā reaches.

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

76 of 76 minutes covered

Evening of Sunday 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

Pūrṇimā presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 14:15 on Sat 19 Jul to 11:20 on Sun 20 Jul.

    1997-07-19T06:15:25Z → 1997-07-20T03:20:17Z

  2. 02

    Kāla

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

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

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 76 of 76 minutes on the 19th and 0 of 76 on the 20th.

    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 19488 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 1997: Saturday 19 July.

    confidence: determinate

Say it like this

In Baoding, Śiva Śayanotsava 1997 falls on Saturday 19 July. Pūrṇimā runs from 14:15 on Sat 19 Jul to 11:20 on Sun 20 Jul and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1997/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 19 Jul
Ahargaṇa, classicalDisc centre, no refractionSat 19 Jul
compat-drikpanchangComparison profileSat 19 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 19thCoveredSunset 20thCoveredRuled
Los Angeles23:15 → 20:2020:0318 min20:020 min19 Jul
Chicago01:15 → 22:2020:2174 min20:200 min19 Jul
Jersey City02:15 → 23:2020:2375 min20:220 min19 Jul
Port of Spain02:15 → 23:2018:3291 min18:320 min19 Jul
London07:15 → 04:2021:0764 min21:050 min19 Jul
Durban08:15 → 05:2017:16108 min17:160 min19 Jul
Dubai10:15 → 07:2019:1084 min19:090 min19 Jul
Delhi11:45 → 08:5019:1982 min19:190 min19 Jul
Kolkata11:45 → 08:5018:2385 min18:220 min19 Jul
Singapore14:15 → 11:2019:1695 min19:160 min19 Jul
Sydney16:15 → 13:2017:06111 min17:070 min19 Jul
Suva18:15 → 15:2017:4775 min17:480 min19 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

About Ahargaṇa