Ruling · Gaurī Tṛtīyā (Gangaur) · 2012

Sunday 25 March

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 580 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 24 March

Tṛtīyā is absent from madhyāhna. Not taken.

madhyāhna begins 12:47  13:35 madhyāhna ends
11:5912:2312:4713:1113:3513:5914:23

0 of 48 minutes covered

Midday of Sunday 25 March

Taken. The only midday Tṛtīyā reaches.

madhyāhna begins 12:46  13:34 madhyāhna ends
11:5812:2212:4613:1013:3413:5814:22

48 of 48 minutes covered

Tṛtīyā presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Tṛtīyā runs from 23:15 on Sat 24 Mar to 01:47 on Mon 26 Mar.

    2012-03-24T18:45:15Z → 2012-03-25T21:17:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 24th, 12:46–13:34 on the 25th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 24th and 48 of 48 on the 25th.

    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: unstated → only-day · margin 34828 s

  5. 05

    Ruling

    Gaurī Tṛtīyā, Tehran, 2012: Sunday 25 March.

    confidence: determinate

Say it like this

In Tehran, Gaurī Tṛtīyā (Gangaur) 2012 falls on Sunday 25 March. Tṛtīyā runs from 23:15 on Sat 24 Mar to 01:47 on Mon 26 Mar and covers all of madhyāhna that midday.

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

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 25 Mar
Ahargaṇa, classicalDisc centre, no refractionSun 25 Mar
compat-drikpanchangComparison profileSun 25 Mar
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/gauri-tritiya · ruleset 2026.3-draft

Month
Caitra, amānta
Pakṣa · aṅga
Śukla · Tṛtīyā
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 102

“S 3 Dolotsava, Gauri trtiya, Andolana trtiya, Saubhagya sayana vrata (paraviddha), Sarhul (Bihar).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceTṛtīyāMadhyāhna 24thCoveredMadhyāhna 25thCoveredRuled
Los Angeles11:45 → 14:1712:3548 min12:3548 min24 Mar
Chicago13:45 → 16:1712:330 min12:3348 min25 Mar
Jersey City14:45 → 17:1712:390 min12:3848 min25 Mar
Port of Spain14:45 → 17:1711:480 min11:4848 min25 Mar
London18:45 → 22:1711:430 min12:4348 min25 Mar
Durban20:45 → 23:1711:380 min11:3848 min25 Mar
Dubai22:45 → 01:1712:010 min12:0148 min25 Mar
Delhi00:15 → 02:4712:040 min12:0348 min25 Mar
Kolkata00:15 → 02:4711:190 min11:1948 min25 Mar
Singapore02:45 → 05:1712:470 min12:4748 min25 Mar
Sydney05:45 → 08:1712:370 min12:3748 min25 Mar
Suva06:45 → 09:1711:480 min11:4848 min25 Mar
Profile · tradition
pac-rp@2026.1 · smarta
Rule
gauri-tritiya@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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