Ruling · Rathayātrā · 2050

Tuesday 21 June

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 7 min 11 s.

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 20 June

Qualifies with 7 of 48 minutes. Not taken.

madhyāhna begins 11:42  12:30 madhyāhna ends
Dvitīyā begins 12:22:51
10:5411:1811:4212:0612:3012:5413:18

7 of 48 minutes covered, the last 7

Midday of Tuesday 21 June

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

madhyāhna begins 11:42  12:30 madhyāhna ends
10:5411:1811:4212:0612:3012:5413:18

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 12:23 on Mon 20 Jun to 13:22 on Tue 21 Jun.

    2050-06-20T08:52:51Z → 2050-06-21T09:52:17Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:42–12:30 on the 20th, 11:42–12:30 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 7 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

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 431 s

  5. 05

    Ruling

    Rathayātrā, Tehran, 2050: Tuesday 21 June.

    confidence: determinate

Say it like this

In Tehran, Rathayātrā 2050 falls on Tuesday 21 June. Dvitīyā runs from 12:23 on Mon 20 Jun to 13:22 on Tue 21 Jun and covers all of madhyāhna that midday. It also reaches the previous midday for 7 minutes; by the rule the second midday is taken.

ahargana.org/tehran/festivals/2050/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 21 Jun
Ahargaṇa, classicalDisc centre, no refractionTue 21 Jun
compat-drikpanchangComparison profileTue 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 Angeles01:53 → 02:5212:3148 min12:310 min20 Jun
Chicago03:53 → 04:5212:2848 min12:290 min20 Jun
Jersey City04:53 → 05:5212:3448 min12:340 min20 Jun
Port of Spain04:53 → 05:5211:4448 min11:440 min20 Jun
London09:53 → 10:5212:3848 min12:380 min20 Jun
Durban10:53 → 11:5211:3448 min11:3418 min21 Jun
Dubai12:53 → 13:5211:560 min11:5748 min21 Jun
Delhi14:23 → 15:2211:590 min11:5948 min21 Jun
Kolkata14:23 → 15:2211:140 min11:1448 min21 Jun
Singapore16:53 → 17:5212:420 min12:4348 min21 Jun
Sydney18:53 → 19:5211:330 min11:3348 min21 Jun
Suva20:53 → 21:5211:440 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

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