Ruling · Rādhāṣṭamī · 2064

Thursday 18 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 12 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 Wednesday 17 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:48  12:36 madhyāhna ends
Aṣṭamī begins 13:18:45
11:0011:2411:4812:1212:3613:0013:24

0 of 48 minutes covered

Midday of Thursday 18 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:48  12:36 madhyāhna ends
Aṣṭamī ends 12:24:11
11:0011:2411:4812:1212:3613:0013:24

36 of 48 minutes covered, the first 36

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 13:19 on Wed 17 Sep to 12:24 on Thu 18 Sep.

    2064-09-17T05:18:45Z → 2064-09-18T04:24:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 17th, 11:48–12:36 on the 18th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 17th and 36 of 48 on the 18th.

    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 704 s

  5. 05

    Ruling

    Rādhāṣṭamī, Baoding, 2064: Thursday 18 September.

    confidence: determinate

Say it like this

In Baoding, Rādhāṣṭamī 2064 falls on Thursday 18 September. Aṣṭamī runs from 13:19 on Wed 17 Sep to 12:24 on Thu 18 Sep and covers 36 of 48 minutes of madhyāhna that midday.

ahargana.org/baoding/festivals/2064/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 18 Sep
Ahargaṇa, classicalDisc centre, no refractionThu 18 Sep
compat-drikpanchangComparison profileThu 18 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles22:19 → 21:2412:2348 min12:230 min17 Sep
Chicago00:19 → 23:2412:2148 min12:200 min17 Sep
Jersey City01:19 → 00:2412:2648 min12:260 min17 Sep
Port of Spain01:19 → 00:2411:3648 min11:360 min17 Sep
London06:19 → 05:2412:3048 min12:300 min17 Sep
Durban07:19 → 06:2411:2648 min11:260 min17 Sep
Dubai09:19 → 08:2411:4948 min11:490 min17 Sep
Delhi10:49 → 09:5411:5148 min11:510 min17 Sep
Kolkata10:49 → 09:5411:0748 min11:060 min17 Sep
Singapore13:19 → 12:2412:354 min12:350 min17 Sep
Sydney15:19 → 14:2411:260 min11:2648 min18 Sep
Suva17:19 → 16:2411:370 min11:3748 min18 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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