Ruling · Rathayātrā · 1987

Sunday 28 June

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 20 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 27 June

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:43  12:31 madhyāhna ends
Dvitīyā begins 11:22:53
10:5511:1911:4312:0712:3112:5513:19

48 of 48 minutes covered

Midday of Sunday 28 June

Taken. Both middays qualify; the rule takes the second.

madhyāhna begins 11:43  12:31 madhyāhna ends
10:5511:1911:4312:0712:3112:5513:19

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 11:23 on Sat 27 Jun to 13:47 on Sun 28 Jun.

    1987-06-27T07:52:53Z → 1987-06-28T10:17:09Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:43–12:31 on the 27th, 11:43–12:31 on the 28th.

    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 27th and 48 of 48 on the 28th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 1217 s

  5. 05

    Ruling

    Rathayātrā, Tehran, 1987: Sunday 28 June.

    confidence: determinate

Say it like this

In Tehran, Rathayātrā 1987 falls on Sunday 28 June. Dvitīyā runs from 11:23 on Sat 27 Jun to 13:47 on Sun 28 Jun and covers all of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken.

ahargana.org/tehran/festivals/1987/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 28 Jun
Ahargaṇa, classicalDisc centre, no refractionSun 28 Jun
compat-drikpanchangComparison profileSun 28 Jun
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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles00:53 → 03:1712:3248 min12:320 min27 Jun
Chicago02:53 → 05:1712:3048 min12:300 min27 Jun
Jersey City03:53 → 06:1712:3548 min12:350 min27 Jun
Port of Spain03:53 → 06:1711:4548 min11:450 min27 Jun
London08:53 → 11:1712:3948 min12:400 min27 Jun
Durban09:53 → 12:1711:3548 min11:3542 min28 Jun
Dubai11:53 → 14:1711:5848 min11:5848 min28 Jun
Delhi13:23 → 15:4712:000 min12:0048 min28 Jun
Kolkata13:23 → 15:4711:150 min11:1648 min28 Jun
Singapore15:53 → 18:1712:430 min12:4448 min28 Jun
Sydney17:53 → 20:1711:340 min11:3448 min28 Jun
Suva19:53 → 22:1711:450 min11:4548 min28 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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