Ruling · Kokilā Vrata · 1981

Thursday 16 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 248 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 Thursday 16 July

Taken. The only late afternoon Pūrṇimā reaches.

16:47 sāyāhna beginssunset 19:42
16:2316:4717:1117:3517:5918:2318:4719:1119:3519:59

175 of 175 minutes covered

Late afternoon of Friday 17 July

Pūrṇimā is absent from sāyāhna. Not taken.

16:46 sāyāhna beginssunset 19:42
16:2216:4617:1017:3417:5818:2218:4619:1019:3419:58

0 of 175 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 11:46 on Thu 16 Jul to 12:39 on Fri 17 Jul.

    1981-07-16T03:45:33Z → 1981-07-17T04:38:49Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:47–19:42 on the 16th, 16:46–19:42 on the 17th.

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

  3. 03

    Rule

    Pūrṇimā must be present during sāyāhna. It covers 175 of 175 minutes on the 16th and 0 of 175 on the 17th.

    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 14860 s

  5. 05

    Ruling

    Kokilā Vrata, Baoding, 1981: Thursday 16 July.

    confidence: determinate

Say it like this

In Baoding, Kokilā Vrata 1981 falls on Thursday 16 July. Pūrṇimā runs from 11:46 on Thu 16 Jul to 12:39 on Fri 17 Jul and covers all of sāyāhna that late afternoon.

ahargana.org/baoding/festivals/1981/kokila-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 16 Jul
Ahargaṇa, classicalDisc centre, no refractionThu 16 Jul
compat-drikpanchangComparison profileThu 16 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 16thCoveredSāyāhna 17thCoveredRuled
Los Angeles20:46 → 21:3917:14170 min17:140 min16 Jul
Chicago22:46 → 23:3917:24179 min17:240 min16 Jul
Jersey City23:46 → 00:3917:28177 min17:280 min16 Jul
Port of Spain23:46 → 00:3916:00152 min16:000 min16 Jul
London04:46 → 05:3917:56194 min17:560 min16 Jul
Durban05:46 → 06:3915:09125 min15:100 min16 Jul
Dubai07:46 → 08:3916:28162 min16:280 min16 Jul
Delhi09:16 → 10:0916:35165 min16:350 min16 Jul
Kolkata09:16 → 10:0915:43160 min15:430 min16 Jul
Singapore11:16 → 12:0916:20146 min16:200 min16 Jul
Sydney13:46 → 14:3915:03121 min15:040 min16 Jul
Suva15:46 → 16:3915:33121 min15:3366 min16 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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