Ruling · Rathayātrā · 2012

Thursday 21 June

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 457 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 Wednesday 20 June

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 12:42  13:30 madhyāhna ends
11:5412:1812:4213:0613:3013:5414:18

0 of 48 minutes covered

Midday of Thursday 21 June

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 12:42  13:30 madhyāhna ends
11:5412:1812:4213:0613:3013:5414:18

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 21:06 on Wed 20 Jun to 22:14 on Thu 21 Jun.

    2012-06-20T16:36:30Z → 2012-06-21T17:44:17Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 20th, 12:42–13:30 on the 21st.

    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 20th and 48 of 48 on the 21st.

    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 27392 s

  5. 05

    Ruling

    Rathayātrā, Tehran, 2012: Thursday 21 June.

    confidence: determinate

Say it like this

In Tehran, Rathayātrā 2012 falls on Thursday 21 June. Dvitīyā runs from 21:06 on Wed 20 Jun to 22:14 on Thu 21 Jun and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2012/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 21 Jun
Ahargaṇa, classicalDisc centre, no refractionThu 21 Jun
compat-drikpanchangComparison profileThu 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles09:36 → 10:4412:3148 min12:310 min20 Jun
Chicago11:36 → 12:4412:2848 min12:2916 min21 Jun
Jersey City12:36 → 13:4412:3446 min12:3448 min21 Jun
Port of Spain12:36 → 13:4411:440 min11:4448 min21 Jun
London17:36 → 18:4412:380 min12:3848 min21 Jun
Durban18:36 → 19:4411:340 min11:3448 min21 Jun
Dubai20:36 → 21:4411:560 min11:5748 min21 Jun
Delhi22:06 → 23:1411:590 min11:5948 min21 Jun
Kolkata22:06 → 23:1411:140 min11:1448 min21 Jun
Singapore00:36 → 01:4412:420 min12:4248 min21 Jun
Sydney02:36 → 03:4411:330 min11:3348 min21 Jun
Suva04:36 → 05:4411:440 min11:4448 min21 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

About Ahargaṇa