Ruling · Rādhāṣṭamī · 1986

Thursday 11 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 424 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

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

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Thursday 11 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 12:51  13:39 madhyāhna ends
12:0312:2712:5113:1513:3914:0314:27

48 of 48 minutes covered

Midday of Friday 12 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:50  13:38 madhyāhna ends
12:0212:2612:5013:1413:3814:0214:26

0 of 48 minutes covered

Aṣṭamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 05:47 on Thu 11 Sep to 03:34 on Fri 12 Sep.

    1986-09-10T20:46:42Z → 1986-09-11T18:33:49Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:51–13:39 on the 11th, 12:50–13:38 on the 12th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 11th and 0 of 48 on the 12th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 25437 s

  5. 05

    Ruling

    Rādhāṣṭamī, Baoding, 1986: Thursday 11 September.

    confidence: determinate

Say it like this

In Baoding, Rādhāṣṭamī 1986 falls on Thursday 11 September. Aṣṭamī runs from 05:47 on Thu 11 Sep to 03:34 on Fri 12 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1986/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 11 Sep
Ahargaṇa, classicalDisc centre, no refractionThu 11 Sep
compat-drikpanchangComparison profileThu 11 Sep
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/radhashtami · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Śukla · Aṣṭamī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 103

“S 8 Durvastami (purvaviddha — S 8 of saura Bhadra except Bengal), Mahalaksmi vratarambha, Radhastami (madhyahna vyapini)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 10thCoveredMadhyāhna 11thCoveredRuled
Los Angeles13:47 → 11:3412:260 min12:250 min11 Sep
Chicago15:47 → 13:3412:230 min12:2348 min11 Sep
Jersey City16:47 → 14:3412:290 min12:2948 min11 Sep
Port of Spain16:47 → 14:3411:390 min11:3948 min11 Sep
London21:47 → 19:3412:330 min12:3348 min11 Sep
Durban22:47 → 20:3411:290 min11:2948 min11 Sep
Dubai00:47 → 22:3411:520 min11:5148 min11 Sep
Delhi02:17 → 00:0411:540 min11:5448 min11 Sep
Kolkata02:17 → 00:0411:100 min11:0948 min11 Sep
Singapore04:47 → 02:3412:380 min12:3748 min11 Sep
Sydney06:47 → 04:3411:290 min11:2848 min11 Sep
Suva08:47 → 06:3411:400 min11:3948 min11 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
radhashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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