Ruling · Rathayātrā · 2078

Sunday 10 July

Boundaryin Tehran, under the Rashtriya Panchang method. A threshold is only 3 min 02 s away. Say “contested”.

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 10 July

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 11:46  12:34 madhyāhna ends
Dvitīyā begins 11:48:59
10:5811:2211:4612:1012:3412:5813:22

45 of 48 minutes covered, the last 45

Midday of Monday 11 July

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 11:46  12:34 madhyāhna ends
10:5811:2211:4612:1012:3412:5813:22

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 11:49 on Sun 10 Jul to 10:29 on Mon 11 Jul.

    2078-07-10T08:19:00Z → 2078-07-11T06:59:28Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 10th, 11:46–12:34 on the 11th.

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

  3. 03

    Rule

    Dvitīyā must be present during madhyāhna. It covers 45 of 48 minutes on the 10th and 0 of 48 on the 11th.

    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 182 s < 300 s

  5. 05

    Ruling

    Rathayātrā, Tehran, 2078: Sunday 10 July.

    confidence: boundary (margin)

Say it like this

In Tehran, Rathayātrā 2078 falls on Sunday 10 July. Dvitīyā runs from 11:49 on Sun 10 Jul to 10:29 on Mon 11 Jul and covers 45 of 48 minutes of madhyāhna that midday. It is 3 min 02 s from a threshold: treat the date as contested.

ahargana.org/tehran/festivals/2078/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 10 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 10 Jul
compat-drikpanchangComparison profileSun 10 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 10thCoveredMadhyāhna 11thCoveredRuled
Los Angeles01:19 → 23:5912:3548 min12:350 min10 Jul
Chicago03:19 → 01:5912:3248 min12:320 min10 Jul
Jersey City04:19 → 02:5912:3848 min12:380 min10 Jul
Port of Spain04:19 → 02:5911:4848 min11:480 min10 Jul
London09:19 → 07:5912:4248 min12:420 min10 Jul
Durban10:19 → 08:5911:3848 min11:380 min10 Jul
Dubai12:19 → 10:5912:0029 min12:010 min10 Jul
Delhi13:49 → 12:2912:030 min12:0327 min11 Jul
Kolkata13:49 → 12:2911:180 min11:1848 min11 Jul
Singapore16:19 → 14:5912:460 min12:4648 min11 Jul
Sydney18:19 → 16:5911:370 min11:3748 min11 Jul
Suva20:19 → 18:5911:480 min11:4848 min11 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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