Ruling · Kokilā Vrata · 1998

Thursday 9 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 256 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

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 Wednesday 8 July

Pūrṇimā is absent from sāyāhna. Not taken.

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

0 of 177 minutes covered

Late afternoon of Thursday 9 July

Taken. The only late afternoon Pūrṇimā reaches.

16:48 sāyāhna beginssunset 19:45
16:2416:4817:1217:3618:0018:2418:4819:1219:3620:00

177 of 177 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 00:25 on Thu 9 Jul to 00:01 on Fri 10 Jul.

    1998-07-08T16:24:57Z → 1998-07-09T16:00:53Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:49–19:46 on the 8th, 16:48–19:45 on the 9th.

    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 177 minutes on the 8th and 177 of 177 on the 9th.

    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 15331 s

  5. 05

    Ruling

    Kokilā Vrata, Baoding, 1998: Thursday 9 July.

    confidence: determinate

Say it like this

In Baoding, Kokilā Vrata 1998 falls on Thursday 9 July. Pūrṇimā runs from 00:25 on Thu 9 Jul to 00:01 on Fri 10 Jul and covers all of sāyāhna that late afternoon.

ahargana.org/baoding/festivals/1998/kokila-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 9 Jul
Ahargaṇa, classicalDisc centre, no refractionThu 9 Jul
compat-drikpanchangComparison profileThu 9 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 8thCoveredSāyāhna 9thCoveredRuled
Los Angeles09:25 → 09:0117:15172 min17:150 min8 Jul
Chicago11:25 → 11:0117:27181 min17:260 min8 Jul
Jersey City12:25 → 12:0117:30179 min17:300 min8 Jul
Port of Spain12:25 → 12:0116:00153 min16:000 min8 Jul
London17:25 → 17:0118:00197 min18:000 min8 Jul
Durban18:25 → 18:0115:060 min15:07124 min9 Jul
Dubai20:25 → 20:0116:290 min16:29163 min9 Jul
Delhi21:55 → 21:3116:360 min16:36166 min9 Jul
Kolkata21:55 → 21:3115:440 min15:44161 min9 Jul
Singapore00:25 → 00:0116:490 min16:49146 min9 Jul
Sydney02:25 → 02:0115:000 min15:00120 min9 Jul
Suva04:25 → 04:0115:310 min15:31133 min9 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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