Ruling · Rathayātrā · 1912

Tuesday 16 July

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 14 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 15 July

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 11:41  12:29 madhyāhna ends
Dvitīyā begins 12:44:02
10:5311:1711:4112:0512:2912:5313:17

0 of 48 minutes covered

Midday of Tuesday 16 July

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

madhyāhna begins 11:41  12:29 madhyāhna ends
10:5311:1711:4112:0512:2912:5313:17

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 12:43 on Mon 15 Jul to 08:55 on Tue 16 Jul.

    1912-07-15T09:18:19Z → 1912-07-16T05:30:07Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:41–12:29 on the 15th, 11:41–12:29 on the 16th.

    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 15th and 0 of 48 on the 16th.

    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 867 s

  5. 05

    Ruling

    Rathayātrā, Tehran, 1912: Tuesday 16 July.

    confidence: determinate

Say it like this

In Tehran, Rathayātrā 1912 falls on Tuesday 16 July. Dvitīyā runs from 12:43 on Mon 15 Jul to 08:55 on Tue 16 Jul, and reaches madhyāhna on neither day.

ahargana.org/tehran/festivals/1912/rathayatra · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 16 Jul
Ahargaṇa, classicalDisc centre, no refractionTue 16 Jul
compat-drikpanchangComparison profileMon 15 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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles01:18 → 21:3011:3548 min11:350 min15 Jul
Chicago03:18 → 23:3011:3248 min11:320 min15 Jul
Jersey City04:18 → 00:3011:3848 min11:380 min15 Jul
Port of Spain05:18 → 01:3011:4848 min11:480 min15 Jul
London09:18 → 05:3011:4248 min11:420 min15 Jul
Durban11:18 → 07:3011:3848 min11:380 min15 Jul
Dubai12:59 → 09:1111:410 min11:410 min16 Jul
Delhi14:48 → 11:0012:030 min12:030 min16 Jul
Kolkata14:48 → 11:0011:180 min11:180 min16 Jul
Singapore16:18 → 12:3011:460 min11:4644 min16 Jul
Sydney19:18 → 15:3011:370 min11:3748 min16 Jul
Suva21:13 → 17:2511:430 min11:4348 min16 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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