Ruling · Rādhāṣṭamī · 2041

Tuesday 3 September

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 170 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 Tuesday 3 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

48 of 48 minutes covered

Midday of Wednesday 4 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

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 08:49 on Tue 3 Sep to 08:37 on Wed 4 Sep.

    2041-09-03T05:19:06Z → 2041-09-04T05:06:40Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 3rd, 11:39–12:27 on the 4th.

    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 3rd and 0 of 48 on the 4th.

    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 10216 s

  5. 05

    Ruling

    Rādhāṣṭamī, Tehran, 2041: Tuesday 3 September.

    confidence: determinate

Say it like this

In Tehran, Rādhāṣṭamī 2041 falls on Tuesday 3 September. Aṣṭamī runs from 08:49 on Tue 3 Sep to 08:37 on Wed 4 Sep and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2041/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 3 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 3 Sep
compat-drikpanchangComparison profileTue 3 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 3rdCoveredMadhyāhna 4thCoveredRuled
Los Angeles22:19 → 22:0712:2848 min12:280 min3 Sep
Chicago00:19 → 00:0712:2548 min12:250 min3 Sep
Jersey City01:19 → 01:0712:3148 min12:310 min3 Sep
Port of Spain01:19 → 01:0711:4148 min11:410 min3 Sep
London06:19 → 06:0712:3548 min12:350 min3 Sep
Durban07:19 → 07:0711:3148 min11:310 min3 Sep
Dubai09:19 → 09:0711:5448 min11:540 min3 Sep
Delhi10:49 → 10:3711:5648 min11:560 min3 Sep
Kolkata10:49 → 10:3711:1248 min11:110 min3 Sep
Singapore13:19 → 13:0712:409 min12:4027 min4 Sep
Sydney15:19 → 15:0711:310 min11:3148 min4 Sep
Suva17:19 → 17:0711:420 min11:4248 min4 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

About Ahargaṇa