Ruling · Kokilā Vrata · 2086

Friday 26 July

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 3 min 03 s away. Say “contested”.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two late afternoons

One ghaṭī is 24 minutes. Sāyāhna is last 3 of 15 day muhūrtas.

Late afternoon of Thursday 25 July

Pūrṇimā is absent from sāyāhna. Not taken.

16:43 sāyāhna beginssunset 19:36
Pūrṇimā begins 19:38:50
16:1916:4317:0717:3117:5518:1918:4319:0719:3119:55

0 of 172 minutes covered

Late afternoon of Friday 26 July

Taken. The only late afternoon Pūrṇimā reaches.

16:43 sāyāhna beginssunset 19:35
Pūrṇimā ends 17:25:27
16:1916:4317:0717:3117:5518:1918:4319:0719:3119:55

43 of 172 minutes covered, the first 43

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 19:39 on Thu 25 Jul to 17:25 on Fri 26 Jul.

    2086-07-25T11:38:50Z → 2086-07-26T09:25:28Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:43–19:36 on the 25th, 16:43–19:35 on the 26th.

    sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during sāyāhna. It covers 0 of 172 minutes on the 25th and 43 of 172 on the 26th.

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

  4. 04

    Tie-break

    Only one late afternoon qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 183 s < 300 s

  5. 05

    Ruling

    Kokilā Vrata, Baoding, 2086: Friday 26 July.

    confidence: boundary (margin)

Say it like this

In Baoding, Kokilā Vrata 2086 falls on Friday 26 July. Pūrṇimā runs from 19:39 on Thu 25 Jul to 17:25 on Fri 26 Jul and covers 43 of 172 minutes of sāyāhna that late afternoon. It is 3 min 03 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2086/kokila-vrata · 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/kokila-vrata · ruleset 2026.3-draft

Month
Āṣāḍha, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Sāyāhna
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.

PlacePūrṇimāSāyāhna 25thCoveredSāyāhna 26thCoveredRuled
Los Angeles04:39 → 02:2517:11168 min17:110 min25 Jul
Chicago06:39 → 04:2517:20175 min17:200 min25 Jul
Jersey City07:39 → 05:2517:24174 min17:240 min25 Jul
Port of Spain07:39 → 05:2516:00151 min16:000 min25 Jul
London12:39 → 10:2517:50189 min17:490 min25 Jul
Durban13:39 → 11:2515:13127 min15:140 min25 Jul
Dubai15:39 → 13:2516:27161 min16:260 min25 Jul
Delhi17:09 → 14:5516:33128 min16:330 min25 Jul
Kolkata17:09 → 14:5515:4272 min15:420 min25 Jul
Singapore19:39 → 17:2516:510 min16:5135 min26 Jul
Sydney21:39 → 19:2515:080 min15:08124 min26 Jul
Suva23:39 → 21:2515:350 min15:36135 min26 Jul
Profile · tradition
pac-rp@2026.1 · smarta
Rule
kokila-vrata@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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