Ruling · Kokilā Vrata · 2009

Monday 6 July

Boundaryin Baoding, under the Rashtriya Panchang method. Both late afternoons 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 late afternoons

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

Late afternoon of Monday 6 July

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

16:49 sāyāhna beginssunset 19:46
16:2516:4917:1317:3718:0118:2518:4919:1319:3720:01

177 of 177 minutes covered

Late afternoon of Tuesday 7 July

Qualifies with 33 of 177 minutes. Not taken.

16:49 sāyāhna beginssunset 19:46
Pūrṇimā ends 17:21:24
16:2516:4917:1317:3718:0118:2518:4919:1319:3720:01

33 of 177 minutes covered, the first 33

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 14:53 on Mon 6 Jul to 17:21 on Tue 7 Jul.

    2009-07-06T06:52:39Z → 2009-07-07T09:21:25Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:49–19:46 on the 6th, 16:49–19:46 on the 7th.

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

  3. 03

    Rule

    Pūrṇimā must be present during sāyāhna. It covers 177 of 177 minutes on the 6th and 33 of 177 on the 7th.

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

  4. 04

    Tie-break

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

    priority: unstated → greater-coverage · margin 1963 s

  5. 05

    Ruling

    Kokilā Vrata, Baoding, 2009: Monday 6 July.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Kokilā Vrata 2009 falls on Monday 6 July. Pūrṇimā runs from 14:53 on Mon 6 Jul to 17:21 on Tue 7 Jul and covers all of sāyāhna that late afternoon. It also reaches the next late afternoon for 33 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/2009/kokila-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 6 Jul
Ahargaṇa, classicalDisc centre, no refractionMon 6 Jul
compat-drikpanchangComparison profileMon 6 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 6thCoveredSāyāhna 7thCoveredRuled
Los Angeles23:53 → 02:2117:16172 min17:150 min6 Jul
Chicago01:53 → 04:2117:27181 min17:270 min6 Jul
Jersey City02:53 → 05:2117:30180 min17:300 min6 Jul
Port of Spain02:53 → 05:2116:00153 min16:000 min6 Jul
London07:53 → 10:2118:01197 min18:010 min6 Jul
Durban08:53 → 11:2115:06123 min15:060 min6 Jul
Dubai10:53 → 13:2116:29164 min16:290 min6 Jul
Delhi12:23 → 14:5116:36167 min16:360 min6 Jul
Kolkata12:23 → 14:5115:43161 min15:440 min6 Jul
Singapore14:53 → 17:2116:49146 min16:4933 min6 Jul
Sydney16:53 → 19:2114:596 min15:00120 min7 Jul
Suva18:53 → 21:2115:300 min15:31133 min7 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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