Ruling · Rathayātrā · 1983

Monday 11 July

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 23 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 Monday 11 July

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 11:46  12:34 madhyāhna ends
Dvitīyā begins 12:10:47
10:5811:2211:4612:1012:3412:5813:22

23 of 48 minutes covered, the last 23

Midday of Tuesday 12 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 12:11 on Mon 11 Jul to 08:31 on Tue 12 Jul.

    1983-07-11T08:40:47Z → 1983-07-12T05:00:43Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 11th, 11:46–12:34 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 23 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 1364 s

  5. 05

    Ruling

    Rathayātrā, Tehran, 1983: Monday 11 July.

    confidence: determinate

Say it like this

In Tehran, Rathayātrā 1983 falls on Monday 11 July. Dvitīyā runs from 12:11 on Mon 11 Jul to 08:31 on Tue 12 Jul and covers 23 of 48 minutes of madhyāhna that midday.

ahargana.org/tehran/festivals/1983/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 11 Jul
Ahargaṇa, classicalDisc centre, no refractionMon 11 Jul
compat-drikpanchangComparison profileMon 11 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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles01:41 → 22:0112:3448 min12:340 min11 Jul
Chicago03:41 → 00:0112:3248 min12:320 min11 Jul
Jersey City04:41 → 01:0112:3848 min12:380 min11 Jul
Port of Spain04:41 → 01:0111:4748 min11:480 min11 Jul
London09:41 → 06:0112:4248 min12:420 min11 Jul
Durban10:41 → 07:0111:3748 min11:370 min11 Jul
Dubai12:41 → 09:0112:007 min12:000 min11 Jul
Delhi14:11 → 10:3112:020 min12:020 min12 Jul
Kolkata14:11 → 10:3111:180 min11:180 min12 Jul
Singapore16:41 → 13:0112:460 min12:4615 min12 Jul
Sydney18:41 → 15:0111:370 min11:3748 min12 Jul
Suva20:41 → 17:0111:480 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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