Ruling · Rathayātrā · 1997

Sunday 6 July

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 632 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 Saturday 5 July

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 12:45  13:33 madhyāhna ends
11:5712:2112:4513:0913:3313:5714:21

0 of 48 minutes covered

Midday of Sunday 6 July

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 12:45  13:33 madhyāhna ends
11:5712:2112:4513:0913:3313:5714:21

48 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 00:05 on Sun 6 Jul to 01:31 on Mon 7 Jul.

    1997-07-05T19:35:04Z → 1997-07-06T21:01:06Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:45–13:33 on the 5th, 12:45–13:33 on the 6th.

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

  3. 03

    Rule

    Dvitīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 5th and 48 of 48 on the 6th.

    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 37940 s

  5. 05

    Ruling

    Rathayātrā, Tehran, 1997: Sunday 6 July.

    confidence: determinate

Say it like this

In Tehran, Rathayātrā 1997 falls on Sunday 6 July. Dvitīyā runs from 00:05 on Sun 6 Jul to 01:31 on Mon 7 Jul and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/1997/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 6 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 6 Jul
compat-drikpanchangComparison profileSun 6 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 5thCoveredMadhyāhna 6thCoveredRuled
Los Angeles12:35 → 14:0112:3346 min12:3448 min6 Jul
Chicago14:35 → 16:0112:310 min12:3148 min6 Jul
Jersey City15:35 → 17:0112:370 min12:3748 min6 Jul
Port of Spain15:35 → 17:0111:470 min11:4748 min6 Jul
London20:35 → 22:0112:410 min12:4148 min6 Jul
Durban21:35 → 23:0111:360 min11:3748 min6 Jul
Dubai23:35 → 01:0111:590 min11:5948 min6 Jul
Delhi01:05 → 02:3112:020 min12:0248 min6 Jul
Kolkata01:05 → 02:3111:170 min11:1748 min6 Jul
Singapore03:35 → 05:0112:450 min12:4548 min6 Jul
Sydney05:35 → 07:0111:360 min11:3648 min6 Jul
Suva07:35 → 09:0111:470 min11:4748 min6 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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