Ruling · Rathayātrā · 1939

Sunday 18 June

Boundaryin Luanda, under the Rashtriya Panchang method. A threshold is only 0 min 31 s away. Say “contested”.

Decide it for

LuandaDelhiKolkataSingaporeSydneyJersey City

8°50′ S 13°14′ E · Africa/Luanda · GeoNames 2240449

The two middays

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

Midday of Sunday 18 June

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 11:44  12:32 madhyāhna ends
Dvitīyā begins 11:43:19
10:5611:2011:4412:0812:3212:5613:20

48 of 48 minutes covered

Midday of Monday 19 June

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 11:44  12:32 madhyāhna ends
10:5611:2011:4412:0812:3212:5613:20

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 11:43 on Sun 18 Jun to 08:36 on Mon 19 Jun.

    1939-06-18T10:43:20Z → 1939-06-19T07:35:35Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:44–12:32 on the 18th, 11:44–12:32 on the 19th.

    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 18th and 0 of 48 on the 19th.

    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 31 s < 300 s

  5. 05

    Ruling

    Rathayātrā, Luanda, 1939: Sunday 18 June.

    confidence: boundary (margin)

Say it like this

In Luanda, Rathayātrā 1939 falls on Sunday 18 June. Dvitīyā runs from 11:43 on Sun 18 Jun to 08:36 on Mon 19 Jun and covers all of madhyāhna that midday. It is 0 min 31 s from a threshold: treat the date as contested.

ahargana.org/luanda/festivals/1939/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 18 Jun
Ahargaṇa, classicalDisc centre, no refractionSun 18 Jun
compat-drikpanchangComparison profileSun 18 Jun
No institution has a recorded ruling for Luanda.

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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles02:43 → 23:3611:3048 min11:300 min18 Jun
Chicago05:43 → 02:3612:2748 min12:280 min18 Jun
Jersey City06:43 → 03:3612:3348 min12:330 min18 Jun
Port of Spain06:43 → 03:3611:4348 min11:430 min18 Jun
London11:43 → 08:3612:3748 min12:380 min18 Jun
Durban12:43 → 09:3611:330 min11:330 min19 Jun
Dubai14:43 → 11:3611:560 min11:560 min19 Jun
Delhi16:13 → 13:0611:580 min11:5848 min19 Jun
Kolkata16:13 → 13:0611:130 min11:1448 min19 Jun
Singapore18:03 → 14:5612:010 min12:0248 min19 Jun
Sydney20:43 → 17:3611:320 min11:3248 min19 Jun
Suva22:43 → 19:3611:430 min11:4348 min19 Jun
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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