Ruling · Rāma Navamī (Rāma Jayantī) · 2021

Wednesday 21 April

Determinatein Perth, under the Rashtriya Panchang method. Clear of every threshold by 517 minutes.

Decide it for

PerthDelhiKolkataSingaporeSydneyJersey City

31°57′ S 115°52′ E · Australia/Perth · GeoNames 2063523

The two middays

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

Midday of Wednesday 21 April

Taken. The only midday Navamī reaches.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

48 of 48 minutes covered

Midday of Thursday 22 April

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

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 03:14 on Wed 21 Apr to 03:06 on Thu 22 Apr.

    2021-04-20T19:13:50Z → 2021-04-21T19:05:32Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 21st, 11:51–12:39 on the 22nd.

    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 21st and 0 of 48 on the 22nd.

    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 31035 s

  5. 05

    Ruling

    Rāma Navamī, Perth, 2021: Wednesday 21 April.

    confidence: determinate

Say it like this

In Perth, Rāma Navamī 2021 falls on Wednesday 21 April. Navamī runs from 03:14 on Wed 21 Apr to 03:06 on Thu 22 Apr and covers all of madhyāhna that midday.

ahargana.org/perth/festivals/2021/rama-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 21 Apr
Ahargaṇa, classicalDisc centre, no refractionWed 21 Apr
compat-drikpanchangComparison profileWed 21 Apr
No institution has a recorded ruling for Perth.

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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles12:14 → 12:0612:2848 min12:280 min20 Apr
Chicago14:14 → 14:0612:260 min12:2648 min21 Apr
Jersey City15:14 → 15:0612:310 min12:3148 min21 Apr
Port of Spain15:14 → 15:0611:410 min11:4148 min21 Apr
London20:14 → 20:0612:360 min12:3648 min21 Apr
Durban21:14 → 21:0611:310 min11:3048 min21 Apr
Dubai23:14 → 23:0611:540 min11:5448 min21 Apr
Delhi00:44 → 00:3611:560 min11:5648 min21 Apr
Kolkata00:44 → 00:3611:120 min11:1148 min21 Apr
Singapore03:14 → 03:0612:400 min12:3948 min21 Apr
Sydney05:14 → 05:0611:300 min11:3048 min21 Apr
Suva07:14 → 07:0611:410 min11:4148 min21 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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