Ruling · Kokilā Vrata · 2015

Friday 31 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 48 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 30 July

Pūrṇimā is absent from sāyāhna. Not taken.

16:41 sāyāhna beginssunset 19:32
16:1716:4117:0517:2917:5318:1718:4119:0519:2919:53

0 of 171 minutes covered

Late afternoon of Friday 31 July

Taken. The only late afternoon Pūrṇimā reaches.

16:40 sāyāhna beginssunset 19:31
Pūrṇimā ends 18:42:54
16:1616:4017:0417:2817:5218:1618:4019:0419:2819:52

123 of 171 minutes covered, the first 123

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 21:31 on Thu 30 Jul to 18:43 on Fri 31 Jul.

    2015-07-30T13:30:51Z → 2015-07-31T10:42:54Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 16:41–19:32 on the 30th, 16:40–19:31 on the 31st.

    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 171 minutes on the 30th and 123 of 171 on the 31st.

    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 2868 s

  5. 05

    Ruling

    Kokilā Vrata, Baoding, 2015: Friday 31 July.

    confidence: determinate

Say it like this

In Baoding, Kokilā Vrata 2015 falls on Friday 31 July. Pūrṇimā runs from 21:31 on Thu 30 Jul to 18:43 on Fri 31 Jul and covers 123 of 171 minutes of sāyāhna that late afternoon.

ahargana.org/baoding/festivals/2015/kokila-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 31 Jul
Ahargaṇa, classicalDisc centre, no refractionFri 31 Jul
compat-drikpanchangComparison profileFri 31 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 30thCoveredSāyāhna 31stCoveredRuled
Los Angeles06:31 → 03:4317:09166 min17:080 min30 Jul
Chicago08:31 → 05:4317:17174 min17:170 min30 Jul
Jersey City09:31 → 06:4317:21173 min17:210 min30 Jul
Port of Spain09:31 → 06:4315:59151 min15:590 min30 Jul
London14:31 → 11:4317:46186 min17:450 min30 Jul
Durban15:31 → 12:4315:14111 min15:140 min30 Jul
Dubai17:31 → 14:4316:2594 min16:250 min30 Jul
Delhi19:01 → 16:1316:3113 min16:310 min30 Jul
Kolkata19:01 → 16:1315:400 min15:4033 min31 Jul
Singapore21:31 → 18:4316:500 min16:50113 min31 Jul
Sydney23:31 → 20:4315:090 min15:09125 min31 Jul
Suva01:31 → 22:4315:360 min15:36135 min31 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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