Ruling · Rādhāṣṭamī · 2035

Sunday 9 September

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 251 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 Sunday 9 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:37  12:25 madhyāhna ends
10:4911:1311:3712:0112:2512:4913:13

48 of 48 minutes covered

Midday of Monday 10 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:37  12:25 madhyāhna ends
10:4911:1311:3712:0112:2512:4913:13

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 05:12 on Sun 9 Sep to 07:27 on Mon 10 Sep.

    2035-09-09T01:42:17Z → 2035-09-10T03:56:38Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:37–12:25 on the 9th, 11:37–12:25 on the 10th.

    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 9th and 0 of 48 on the 10th.

    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 15031 s

  5. 05

    Ruling

    Rādhāṣṭamī, Tehran, 2035: Sunday 9 September.

    confidence: determinate

Say it like this

In Tehran, Rādhāṣṭamī 2035 falls on Sunday 9 September. Aṣṭamī runs from 05:12 on Sun 9 Sep to 07:27 on Mon 10 Sep and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2035/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 9 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 9 Sep
compat-drikpanchangComparison profileSun 9 Sep
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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles18:42 → 20:5712:2648 min12:260 min9 Sep
Chicago20:42 → 22:5712:2448 min12:230 min9 Sep
Jersey City21:42 → 23:5712:2948 min12:290 min9 Sep
Port of Spain21:42 → 23:5711:3948 min11:390 min9 Sep
London02:42 → 04:5712:3348 min12:330 min9 Sep
Durban03:42 → 05:5711:3048 min11:290 min9 Sep
Dubai05:42 → 07:5711:5248 min11:520 min9 Sep
Delhi07:12 → 09:2711:5448 min11:540 min9 Sep
Kolkata07:12 → 09:2711:1048 min11:100 min9 Sep
Singapore09:42 → 11:5712:3848 min12:380 min9 Sep
Sydney11:42 → 13:5711:2935 min11:2948 min10 Sep
Suva13:42 → 15:5711:400 min11:4048 min10 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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