Ruling · Rāma Navamī · 2005

Sunday 17 April

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 120 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 17 April

Taken. The only midday Navamī reaches.

madhyāhna begins 12:40  13:28 madhyāhna ends
11:5212:1612:4013:0413:2813:5214:16

48 of 48 minutes covered

Midday of Monday 18 April

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:40  13:28 madhyāhna ends
11:5212:1612:4013:0413:2813:5214:16

0 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 08:20 on Sun 17 Apr to 10:40 on Mon 18 Apr.

    2005-04-17T03:49:55Z → 2005-04-18T06:09:50Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:40–13:28 on the 17th, 12:40–13:28 on the 18th.

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

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 48 of 48 minutes on the 17th and 0 of 48 on the 18th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

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

    priority: unstated → only-day · margin 7207 s

  5. 05

    Ruling

    Rāma Navamī, Tehran, 2005: Sunday 17 April.

    confidence: determinate

Say it like this

In Tehran, Rāma Navamī 2005 falls on Sunday 17 April. Navamī runs from 08:20 on Sun 17 Apr to 10:40 on Mon 18 Apr and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2005/rama-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 17 Apr
Ahargaṇa, classicalDisc centre, no refractionSun 17 Apr
compat-drikpanchangComparison profileSun 17 Apr
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/rama-navami · ruleset 2026.3-draft

Month
Caitra, amānta
Pakṣa · aṅga
Śukla · Navamī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 102

“S 9 Ramanavami (madhyahnavyapini, special with Punarvasu naks.), Rama jayanti.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102. The row calls the day special when it falls with Punarvasu nakṣatra; the nakṣatra is not tested.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceNavamīMadhyāhna 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles20:50 → 23:1012:2948 min12:280 min17 Apr
Chicago22:50 → 01:1012:2648 min12:260 min17 Apr
Jersey City23:50 → 02:1012:3248 min12:320 min17 Apr
Port of Spain23:50 → 02:1011:4248 min11:410 min17 Apr
London04:50 → 07:1012:3748 min12:360 min17 Apr
Durban05:50 → 08:1011:3148 min11:310 min17 Apr
Dubai07:50 → 10:1011:5548 min11:540 min17 Apr
Delhi09:20 → 11:4011:5748 min11:570 min17 Apr
Kolkata09:20 → 11:4011:1248 min11:1228 min17 Apr
Singapore11:50 → 14:1012:4048 min12:4048 min17 Apr
Sydney13:50 → 16:1011:310 min11:3048 min18 Apr
Suva15:50 → 18:1011:420 min11:4248 min18 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
rama-navami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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