Ruling · Rādhāṣṭamī · 2005

Sunday 11 September

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 311 minutes.

Decide it for

ChattogramDelhiKolkataSingaporeSydneyJersey City

22°20′ N 91°50′ E · Asia/Dhaka · GeoNames 1205733

The two middays

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

Midday of Sunday 11 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:25  12:13 madhyāhna ends
10:3711:0111:2511:4912:1312:3713:01

48 of 48 minutes covered

Midday of Monday 12 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:25  12:13 madhyāhna ends
10:3711:0111:2511:4912:1312:3713:01

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 06:14 on Sun 11 Sep to 04:50 on Mon 12 Sep.

    2005-09-11T00:14:00Z → 2005-09-11T22:50:10Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:25–12:13 on the 11th, 11:25–12:13 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 18670 s

  5. 05

    Ruling

    Rādhāṣṭamī, Chattogram, 2005: Sunday 11 September.

    confidence: determinate

Say it like this

In Chattogram, Rādhāṣṭamī 2005 falls on Sunday 11 September. Aṣṭamī runs from 06:14 on Sun 11 Sep to 04:50 on Mon 12 Sep and covers all of madhyāhna that midday.

ahargana.org/chattogram/festivals/2005/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 11 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 11 Sep
compat-drikpanchangComparison profileSun 11 Sep
No institution has a recorded ruling for Chattogram.

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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles17:14 → 15:5012:2548 min12:250 min11 Sep
Chicago19:14 → 17:5012:2348 min12:220 min11 Sep
Jersey City20:14 → 18:5012:2848 min12:280 min11 Sep
Port of Spain20:14 → 18:5011:3948 min11:380 min11 Sep
London01:14 → 23:5012:3348 min12:320 min11 Sep
Durban02:14 → 00:5011:2948 min11:280 min11 Sep
Dubai04:14 → 02:5011:5148 min11:510 min11 Sep
Delhi05:44 → 04:2011:5448 min11:530 min11 Sep
Kolkata05:44 → 04:2011:0948 min11:090 min11 Sep
Singapore08:14 → 06:5012:3748 min12:370 min11 Sep
Sydney10:14 → 08:5011:2848 min11:280 min11 Sep
Suva12:14 → 10:5011:3913 min11:390 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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