Ruling · Mahānavamī · 2002

Monday 14 October

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 538 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 13 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:26  12:14 madhyāhna ends
10:3811:0211:2611:5012:1412:3813:02

0 of 48 minutes covered

Midday of Monday 14 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:26  12:14 madhyāhna ends
10:3811:0211:2611:5012:1412:3813:02

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 21:12 on Sun 13 Oct to 22:01 on Mon 14 Oct.

    2002-10-13T17:42:13Z → 2002-10-14T18:30:41Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:26–12:14 on the 13th, 11:26–12:14 on the 14th.

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

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 0 of 48 minutes on the 13th and 48 of 48 on the 14th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 32270 s

  5. 05

    Ruling

    Mahānavamī, Tehran, 2002: Monday 14 October.

    confidence: determinate

Say it like this

In Tehran, Mahānavamī 2002 falls on Monday 14 October. Navamī runs from 21:12 on Sun 13 Oct to 22:01 on Mon 14 Oct and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2002/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 14 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 14 Oct
compat-drikpanchangComparison profileMon 14 Oct
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/mahanavami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Navamī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“S 9 Mahanavami (purvaviddha) (In Bengal it is observed as paraviddha covering one muhurta from sunrise).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104. The Bengal reading (paraviddha, one muhūrta from sunrise) is not applied.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceNavamīMadhyāhna 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles10:42 → 11:3112:1548 min12:150 min13 Oct
Chicago12:42 → 13:3112:1318 min12:1248 min13 Oct
Jersey City13:42 → 14:3112:180 min12:1848 min14 Oct
Port of Spain13:42 → 14:3111:280 min11:2848 min14 Oct
London18:42 → 19:3112:220 min12:2248 min14 Oct
Durban19:42 → 20:3111:180 min11:1848 min14 Oct
Dubai21:42 → 22:3111:410 min11:4148 min14 Oct
Delhi23:12 → 00:0111:430 min11:4348 min14 Oct
Kolkata23:12 → 00:0110:590 min10:5948 min14 Oct
Singapore01:42 → 02:3112:270 min12:2748 min14 Oct
Sydney03:42 → 04:3111:180 min11:1848 min14 Oct
Suva05:42 → 06:3111:290 min11:2948 min14 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahanavami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa