Ruling · Rathayātrā · 2021

Sunday 11 July

Determinatein Perth, under the Rashtriya Panchang method. Clear of every threshold by 68 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 Sunday 11 July

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 11:58  12:46 madhyāhna ends
11:1011:3411:5812:2212:4613:1013:34

48 of 48 minutes covered

Midday of Monday 12 July

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 11:58  12:46 madhyāhna ends
11:1011:3411:5812:2212:4613:1013:34

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Dvitīyā runs from 10:18 on Sun 11 Jul to 10:50 on Mon 12 Jul.

    2021-07-11T02:17:39Z → 2021-07-12T02:49:58Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 11th, 11:58–12:46 on the 12th.

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

  3. 03

    Rule

    Dvitīyā must be present during madhyāhna. It covers 48 of 48 minutes on the 11th and 0 of 48 on the 12th.

    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: paraviddha → only-day · margin 4100 s

  5. 05

    Ruling

    Rathayātrā, Perth, 2021: Sunday 11 July.

    confidence: determinate

Say it like this

In Perth, Rathayātrā 2021 falls on Sunday 11 July. Dvitīyā runs from 10:18 on Sun 11 Jul to 10:50 on Mon 12 Jul and covers all of madhyāhna that midday.

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

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 11 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 11 Jul
compat-drikpanchangComparison profileSun 11 Jul
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/rathayatra · ruleset 2026.3-draft

Month
Āṣāḍha, amānta
Pakṣa · aṅga
Śukla · Dvitīyā
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 102

“S 2 Rathayatra (paraviddha, special when combined with naksatra 'Pusya')” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102. The row calls the day special with Puṣya nakṣatra; the nakṣatra is not tested.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvitīyāMadhyāhna 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles19:18 → 19:5012:3448 min12:350 min11 Jul
Chicago21:18 → 21:5012:3248 min12:320 min11 Jul
Jersey City22:18 → 22:5012:3848 min12:380 min11 Jul
Port of Spain22:18 → 22:5011:4848 min11:480 min11 Jul
London03:18 → 03:5012:4248 min12:420 min11 Jul
Durban04:18 → 04:5011:3848 min11:380 min11 Jul
Dubai06:18 → 06:5012:0048 min12:000 min11 Jul
Delhi07:48 → 08:2012:0348 min12:030 min11 Jul
Kolkata07:48 → 08:2011:1848 min11:180 min11 Jul
Singapore10:18 → 10:5012:4648 min12:460 min11 Jul
Sydney12:18 → 12:5011:377 min11:3748 min12 Jul
Suva14:18 → 14:5011:480 min11:4848 min12 Jul
Profile · tradition
pac-rp@2026.1 · smarta
Rule
rathayatra@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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