Ruling · Rathayātrā · 1973

Sunday 1 July

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 13 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 1 July

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 11:44  12:32 madhyāhna ends
Dvitīyā begins 11:31:18
10:5611:2011:4412:0812:3212:5613:20

48 of 48 minutes covered

Midday of Monday 2 July

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 11:31 on Sun 1 Jul to 08:09 on Mon 2 Jul.

    1973-07-01T08:01:19Z → 1973-07-02T04:39:04Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:44–12:32 on the 1st, 11:44–12:32 on the 2nd.

    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 1st and 0 of 48 on the 2nd.

    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 759 s

  5. 05

    Ruling

    Rathayātrā, Tehran, 1973: Sunday 1 July.

    confidence: determinate

Say it like this

In Tehran, Rathayātrā 1973 falls on Sunday 1 July. Dvitīyā runs from 11:31 on Sun 1 Jul to 08:09 on Mon 2 Jul and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/1973/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 1 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 1 Jul
compat-drikpanchangComparison profileSun 1 Jul
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/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 1stCoveredMadhyāhna 2ndCoveredRuled
Los Angeles01:01 → 21:3912:3348 min12:330 min1 Jul
Chicago03:01 → 23:3912:3048 min12:300 min1 Jul
Jersey City04:01 → 00:3912:3648 min12:360 min1 Jul
Port of Spain04:01 → 00:3911:4648 min11:460 min1 Jul
London09:01 → 05:3912:4048 min12:400 min1 Jul
Durban10:01 → 06:3911:3648 min11:360 min1 Jul
Dubai12:01 → 08:3911:5845 min11:590 min1 Jul
Delhi13:31 → 10:0912:010 min12:010 min2 Jul
Kolkata13:31 → 10:0911:160 min11:160 min2 Jul
Singapore15:31 → 12:0912:140 min12:140 min2 Jul
Sydney18:01 → 14:3911:350 min11:3548 min2 Jul
Suva20:01 → 16:3911:460 min11:4648 min2 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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