Ruling · Rathayātrā · 1920

Friday 18 June

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 51 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 Thursday 17 June

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 11:36  12:24 madhyāhna ends
10:4811:1211:3612:0012:2412:4813:12

0 of 48 minutes covered

Midday of Friday 18 June

Taken. Dvitīyā reaches neither midday; the rule takes the second day.

madhyāhna begins 11:36  12:24 madhyāhna ends
10:4811:1211:3612:0012:2412:4813:12

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 13:15 on Thu 17 Jun to 09:31 on Fri 18 Jun.

    1920-06-17T09:49:34Z → 1920-06-18T06:05:46Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 17th, 11:36–12:24 on the 18th.

    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 17th and 0 of 48 on the 18th.

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

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: paraviddha → second-day · margin 3037 s

  5. 05

    Ruling

    Rathayātrā, Tehran, 1920: Friday 18 June.

    confidence: determinate

Say it like this

In Tehran, Rathayātrā 1920 falls on Friday 18 June. Dvitīyā runs from 13:15 on Thu 17 Jun to 09:31 on Fri 18 Jun, and reaches madhyāhna on neither day.

ahargana.org/tehran/festivals/1920/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 18 Jun
Ahargaṇa, classicalDisc centre, no refractionFri 18 Jun
compat-drikpanchangComparison profileThu 17 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles01:50 → 22:0611:3048 min11:300 min17 Jun
Chicago04:50 → 01:0612:2748 min12:280 min17 Jun
Jersey City05:50 → 02:0612:3348 min12:330 min17 Jun
Port of Spain05:50 → 02:0611:4348 min11:430 min17 Jun
London10:50 → 07:0612:3748 min12:370 min17 Jun
Durban11:50 → 08:0611:3231 min11:330 min17 Jun
Dubai13:50 → 10:0611:550 min11:560 min18 Jun
Delhi15:20 → 11:3611:580 min11:580 min18 Jun
Kolkata15:20 → 11:3611:130 min11:1322 min18 Jun
Singapore16:50 → 13:0611:410 min11:4148 min18 Jun
Sydney19:50 → 16:0611:320 min11:3248 min18 Jun
Suva21:50 → 18:0611:430 min11:4348 min18 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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