Ruling · Śiva Śayanotsava · 1973

Saturday 14 July

Boundaryin Baoding, under the Rashtriya Panchang method. Both evenings qualify and the rule does not say which to take. Say “contested”.

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 14 July

Taken. Both evenings qualify; the rule is silent, and this one is covered longer.

19:43 sunsetpradoṣa ends 20:58
19:1919:4320:0720:3120:5521:1921:43

75 of 75 minutes covered

Evening of Sunday 15 July

Qualifies with 13 of 75 minutes. Not taken.

19:43 sunsetpradoṣa ends 20:58
Pūrṇimā ends 19:55:52
19:1919:4320:0720:3120:5521:1921:43

13 of 75 minutes covered, the first 13

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 17:38 on Sat 14 Jul to 19:56 on Sun 15 Jul.

    1973-07-14T09:38:09Z → 1973-07-15T11:55:53Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:43–20:58 on the 14th, 19:43–20:58 on the 15th.

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

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 75 of 75 minutes on the 14th and 13 of 75 on the 15th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 792 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 1973: Saturday 14 July.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Śiva Śayanotsava 1973 falls on Saturday 14 July. Pūrṇimā runs from 17:38 on Sat 14 Jul to 19:56 on Sun 15 Jul and covers all of pradoṣa that evening. It also reaches the next evening for 13 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/baoding/festivals/1973/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 14 Jul
Ahargaṇa, classicalDisc centre, no refractionSat 14 Jul
compat-drikpanchangComparison profileSat 14 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 14thCoveredSunset 15thCoveredRuled
Los Angeles02:38 → 04:5620:0578 min20:050 min14 Jul
Chicago04:38 → 06:5620:2473 min20:240 min14 Jul
Jersey City05:38 → 07:5620:2774 min20:260 min14 Jul
Port of Spain05:38 → 07:5618:3291 min18:320 min14 Jul
London10:38 → 12:5621:1263 min21:110 min14 Jul
Durban11:38 → 13:5617:13109 min17:130 min14 Jul
Dubai13:38 → 15:5619:1184 min19:110 min14 Jul
Delhi15:08 → 17:2619:2182 min19:210 min14 Jul
Kolkata15:08 → 17:2618:2485 min18:240 min14 Jul
Singapore17:08 → 19:2618:4695 min18:4640 min14 Jul
Sydney19:38 → 21:5617:030 min17:04111 min15 Jul
Suva21:38 → 23:5617:460 min17:46103 min15 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