Ruling · Rādhāṣṭamī · 2077

Thursday 26 August

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 71 minutes.

Decide it for

TehranDelhiKolkataSingaporeSydneyJersey City

35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two middays

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

Midday of Thursday 26 August

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:42  12:30 madhyāhna ends
10:5411:1811:4212:0612:3012:5413:18

48 of 48 minutes covered

Midday of Friday 27 August

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:42  12:30 madhyāhna ends
10:5411:1811:4212:0612:3012:5413:18

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 09:22 on Thu 26 Aug to 10:31 on Fri 27 Aug.

    2077-08-26T05:52:23Z → 2077-08-27T07:00:34Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:42–12:30 on the 26th, 11:42–12:30 on the 27th.

    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 26th and 0 of 48 on the 27th.

    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 4266 s

  5. 05

    Ruling

    Rādhāṣṭamī, Tehran, 2077: Thursday 26 August.

    confidence: determinate

Say it like this

In Tehran, Rādhāṣṭamī 2077 falls on Thursday 26 August. Aṣṭamī runs from 09:22 on Thu 26 Aug to 10:31 on Fri 27 Aug and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2077/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 26 Aug
Ahargaṇa, classicalDisc centre, no refractionThu 26 Aug
compat-drikpanchangComparison profileThu 26 Aug
No institution has a recorded ruling for Tehran.

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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles22:52 → 00:0112:3148 min12:300 min26 Aug
Chicago00:52 → 02:0112:2848 min12:280 min26 Aug
Jersey City01:52 → 03:0112:3448 min12:330 min26 Aug
Port of Spain01:52 → 03:0111:4448 min11:440 min26 Aug
London06:52 → 08:0112:3848 min12:380 min26 Aug
Durban07:52 → 09:0111:3448 min11:340 min26 Aug
Dubai09:52 → 11:0111:5748 min11:560 min26 Aug
Delhi11:22 → 12:3111:5948 min11:5932 min26 Aug
Kolkata11:22 → 12:3111:1440 min11:1448 min27 Aug
Singapore13:52 → 15:0112:430 min12:4248 min27 Aug
Sydney15:52 → 17:0111:330 min11:3348 min27 Aug
Suva17:52 → 19:0111:440 min11:4448 min27 Aug
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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